{"title":"Askar","description":"\u003cp\u003eAskar is a leading name in astrophotography, known for well-corrected refractors, astrographs, reducers, flatteners, filters, guide scopes, and imaging accessories. Their product lines, including PHQ, FRA, SQA, APO, and compact portable scopes, are designed to give astrophotographers sharp stars, flat fields, reliable mechanics, and practical camera compatibility.\u003c\/p\u003e\n\u003cp\u003eWhether you are building a beginner imaging setup, a portable wide-field rig, or a full-frame deep-sky system, Askar offers modern optical designs that make it easier to capture nebulae, galaxies, star clusters, and wide-field targets. Ontario Telescope recommends Askar for customers who want strong value, dependable performance, and a complete ecosystem built around real-world astrophotography.\u003c\/p\u003e","products":[{"product_id":"askar-fma135","title":"Askar FMA135 30mm f\/4.5 Mini APO Astrograph","description":"\u003cspan style=\"text-align: justify; background-color: rgb(255, 255, 255); font-family: Arial;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eThe very new beginning of year 2021 witnessed the advent of the Askar FMA135 astrograph which has inherited the consistent quality, compactness and versatility, from the FMA family while possessing incomparable \u003c\/span\u003especialty\u003cspan style=\"font-size: 12pt;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-family: ????; font-size: 14px; text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"text-align: justify; background-color: rgb(255, 255, 255); font-size: 12pt;\"\u003e\u003cspan style=\"text-align: justify; background-color: rgb(255, 255, 255);\"\u003eAs its name indicates, FMA135 was born with a primary objective plus a flattener. The primary objective features an APO triplet structure with a diameter of 35mm and a focal length of 135mm, one of which is an ED glass.\u003c\/span\u003e\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"text-align: justify; background-color: rgb(255, 255, 255); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0); font-family: ????;\"\u003eThe flattener contains three elements which is designed to support APS (advanced photo system) sky imaging and to control the performance at the edge of the photo. The exquisite optical design is the major contribution for its matchless ability in both visual observation and astrophotography as well as chromatic aberration control.\u003c\/span\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0); font-family: ????;\"\u003eFurther, the Askar FMA135 can also work as an excellent finder or guider. Its lightness and grace make it possible to attach the FMA135 to various cameras with corresponding adapters. Once attached, the FMA135 turns to be a 135mm manual lens, which will absolutely bring you an magnificent experience in ground object imaging.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px; text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThere is 1.25\" female thread at the front of the astrograph suitable for all purchasable 1.25\" filters and standard M42×0.75 male thread at the back which accommodates most stock DSLR or astronomy cameras (an extra adapter is needed). Our standard configuration includes a tube ring for the installation of Vixen finder base, a 1.25\" visual back for the attachment of an eyepiece or a guiding camera as well as a high-quality focuser (with thread) and a setting thread to avoid any deviation in astrophotography.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eAs an ingenious optical design, our FMA135 will definitely offer you a super imaging experience.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"margin: 0px; padding: 0px; text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe\u003c\/span\u003e\u003cspan style=\"color: rgb(102, 102, 102); font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e FMA135 can be used in 4 different setups\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"margin: 0px; padding: 0px; color: rgb(102, 102, 102); text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"margin: 0px; padding: 0px; text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eThe FMA 135 mm f\/4.5 as a telephoto lens\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe manual APO telephoto lens is corrected up to full-frame. From the T2 thread you have 55 mm working distance. Ideal for system cameras, DSLR and of course astro cameras. The telephoto lens is so compact that it can be used hands-free. The high speed of f\/4.5 allows short exposure times even under difficult lighting conditions.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eThe FMA 135 f\/4.5 as astrograph\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eAstrophotographers will be delighted with this compact telephoto lens. Stars up to the edge are imaged crispy sharp, when using cameras up to APS-C format. With 55 mm working distance (T2 mount), you can connect all common cameras. The multi-function mount allows easy adaptation to the finder shoe of your telescope or to a piggyback camera mount via the 1\/4\" female thread.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eThe FMA 135 as compact APO refractor and mini guide scope\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe objective provides enough working distance for a 1.25\" star diagonal and standard 1.25\" eyepieces. You can make wonderful wide-field observations or simply connect an autoguider and track your telescope cleanly.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eThe FMA 135 as a spotting scope\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe high-contrast optics enable exciting wildlife and landscape observations. In just a few steps, you have turned the telephoto lens into a compact and crisp spotting scope. You can use all common photo tripods, the adapter is already included.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013648248943,"sku":"FMA135","price":477.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FMA135__27117.jpg?v=1766558604"},{"product_id":"askar-m42-female-m48-male-photo-adapter-for-fma180","title":"Askar M42 Female - M48 Male photo adapter for FMA180","description":"\u003cspan style=\"font-family: Arial;\"\u003eAllows for a 48mm T-Ring and Full Frame camera to be used on the Askar FM180 \u003c\/span\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013652148335,"sku":"FMA180-M42-M48","price":39.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/askar-askar-m42-female-m48-male-photo-adapter-for__28046.jpg?v=1766558684"},{"product_id":"36mm-oiii-7nm-filter","title":"36mm OIII 7nm filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013677248623,"sku":"A-OIII-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__85779.jpg?v=1766559375"},{"product_id":"sii-36mm-filter","title":"SII 36mm Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682032751,"sku":"A-SII-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__36276.jpg?v=1766559624"},{"product_id":"ha-1-25-filter","title":"Ha 1.25\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682163823,"sku":"A-Ha-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__10453.jpg?v=1766559631"},{"product_id":"lrgb-filters-2","title":"LRGB Filters 2\"","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB imaging filter set is designed for those imagers who possess a monochrome camera that use either CCD or CMOS sensors. This filter set enables users to achieve 1:1:1 equalized RGB exposures.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe LRGB filter set includes four mounted imaging filters that pass red, green and blue bands of light together with the full luminance spectrum across the visible band. By taking individual photos with each of the the filters with the help of a monochrome astronomy camera and combining the separate photos with image-processing applications or software, you will get a stunning image of the planets or deep-sky objects. The Askar LRGB imaging filter can greatly simplify and thus reduce the time of post processing.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB filter set has a precise passband including a gap between the red and the green to improve color balance and partially reduce the impact from sodium light. The blue and green filter passbands slightly overlap to allow the emission from nebulae to get a more natural color imaging. The RGB color combination has an equal weight, it means that each color is weighted to approximately 1:1:1, which is critical for automated imaging. Askar LRGB filter set is suitable for planetary or deep-sky object imaging.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB filter set rejects the infrared wavelengths so users don’t need to get an extra IR CUT filter. The Askar LRGB filter set has a terrific transmission at least 90% across its bandpass.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar LRGB filter set is individually examined and tested to ensure that they can satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Designed for monochrome astronomy cameras with CCD or CMOS sensors.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Useful for imaging color pictures of galaxies, star clusters and nebulae.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission can greatly enhance the contrast and bring out the most detailed information of celestial objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003e· Designed to partially cut off the inference of artificial light from sodium vapor street lights and other unwanted disturbance.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar LRGB filter set is parfocal across all the filters.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682294895,"sku":"A-LRGB-2","price":424.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1611712311__66460.jpg?v=1766559637"},{"product_id":"sii-1-25filter","title":"SII 1.25\"Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682327663,"sku":"A-SII-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__95601.jpg?v=1766559642"},{"product_id":"sii-2-filter","title":"SII 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682458735,"sku":"A-SII-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__53715.jpg?v=1766559648"},{"product_id":"ha-2-filter","title":"Ha 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683245167,"sku":"A-Ha-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__10009.jpg?v=1766559654"},{"product_id":"ha-36mm-filter","title":"Ha 36mm Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683376239,"sku":"A-Ha-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__21975.jpg?v=1766559663"},{"product_id":"oiii-7nm-filter-1-25-fitler","title":"OIII 7nm filter 1.25\" Fitler","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683507311,"sku":"A-OIII-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__31385.jpg?v=1766559669"},{"product_id":"oiii-7nm-filter-2-filter","title":"OIII 7nm filter 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683540079,"sku":"A-OIII-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__08164.jpg?v=1766559675"},{"product_id":"askar-fma230-f-4-6-triplet-with-reducer","title":"Askar FMA230 50mm f\/4.6 APO Astrograph with Reducer","description":"\u003cspan style=\"font-family: Arial;\"\u003eThe Askar FMA230 has a compound lens system. The front objective lens comprises three lenses and the posterior reducer is composed of four lenses and thus it’s sometimes dubbed as a “three at the front and four at the rear” system. The aperture size of the objective lens is 50mm and the original focal length is 275mm thus we’ve got a relatively fast focal ratio of f\/5.5. The objective lens contains two ED glasses which are adapted to cure chromatic aberrations.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eOne can barely find an equal counterpart in the market as designing a three-element apochromatic objective lens in astrograph with such size demands more on craftsmanship and processing technique. We made it because we consistently cling to the belief that we have to deliver a better imaging result to our customers. The FMA230 can solely function as a lens to observe the ground scenery or stars in the sky, or as a telescope for direct-focus photography. You should just fine-tune the helical focuser to perfectly focus without adding extra optical devices.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe four-element reducer is a 0.84×optical device which can change the the FMA230 into a 50mm-aperture astrograph with a focal length of 230mm and a focal ratio of f\/4.6. The reducer is designed specially for sophisticated astrophotography, which plays an essential role in improving the image quality generally across the whole field of view. And it pays special attention to the stars at the edge of the image. The pictures will be greatly enhanced and detailed under the help of this dedicated reducer even the imaging equipment you use is a rather professional full-frame ordinary or astronomy camera.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eAskar FMA230 is equipped with useful standard accessories.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe pair of tube rings are artistically pierced. Its stalks are lengthened which means that the tube rings provide more room for the devices, like a camera, that are attached to the FMA230, so they won’t collide with the dovetail plate under the astrograph. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe FMA230 comes with a Vixen-style dovetail plate. Screw the tube-ring-wrapped astrograph onto the dovetail plate and then directly slide the assembly into the slot on top of an equatorial mount. The slot at the center of the dovetail plate is carved for the attachment to a tripod. It’s quite convenient and helpful especially when you carry out some ground imaging or observation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eIn order to solve the awkwardness of carrying around your astrograph when you engage in field astrophotography, the FMA230 is designed with a pretty-looking and utility handle. The detachable handle is installed on the top side of the tube ring. The handle is not just literally a handle, the dovetail slot carved out of the handle can also be a base for the attachment of finders, guiders or ASIAIRs that have a corresponding dovetail foot. So you have more room to integrate as many accessories as possible. Besides, the handle is carved with 45°Arca-swiss style slots at the sides, so an upside-down handle can be directly slid into a corresponding Arca-swiss clamp on a camera tripod.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe lightweight and compact FMA230 is a new sibling from the Askar FMA- family, it will definitely bring your observing and imaging experience to a whole new level! \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013687996527,"sku":"FMA230","price":1008.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FMA230_2525202__14049.1682635769.1280.1280.jpg?v=1766559793"},{"product_id":"askar-eaf-kit-for-acl200","title":"Askar EAF Kit for ACL200","description":"\u003cspan style=\"font-family: Arial; font-size: 12pt; text-align: justify;\"\u003eAs electronically-assisted astronomy becomes more and more popular, many an electronic or computer-commanded device is widely applied in both sky observation and astrophotography. For the purpose of better catering to our customers’ practical needs, we again upgrade the ACL200 lens, introducing the ACL200 AF kit (AF refers to automatic focusing) to the market. The Askar ACL200 AF kit enables users to operate the lens together with ZWO’s EAF (electronic automatic focuser) to realize auto and more accurate focusing.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" microsoft yahei simsun helvetica font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong style=\"text-align: justify; font-size: 12pt;\"\u003eComponents\u003c\/strong\u003e\u003cbr style=\"text-align: justify;\"\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eACL200 AF kit contains several parts:\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eA black square holder, used to accommodate and support the EAF.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eA 20-teeth synchronous pulley\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eA synchronous belt\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eAn Askar Vixen-style dovetail plate\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eAn M5×10 socket head cap screw\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eTwo M4×10 socket head cap screws\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eTwo M6×8 socket head cap screws\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eTwo M4×10 button head screws\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan style=\"text-align: justify;\"\u003eNOTE: the ACL200 lens and ZWO’s EAF appearing in the advertising videos or posters are not included in this kit, they are for demonstration only.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"text-align: justify; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong style=\"text-align: justify; font-size: 12pt;\"\u003eAssembly\u003c\/strong\u003e\u003cbr style=\"text-align: justify;\"\u003e\u003cbr style=\"text-align: justify;\"\u003e\u003cspan style=\"text-align: justify;\"\u003eFirst, take the original black dovetail plate off the ACL200 lens. There are one bigger and two smaller screw holes tapped on one side of the EAF holder, corresponding to the three screw holes at the bottom of the ACL200 lens collar. Connect the ACL200 lens and EAF holder with an M5×10 socket head cap screw and two M4×10 socket head cap screws. Then, insert the synchronous pulley onto the shaft of EAF and put the EAF with pulley into the holder. Wrap the synchronous belt around ACL200 lens and the pulley. Adjust and secure the EAF and its holder, then insert two M4×10 button-head screws into the slots carved out on the side of the holder, tighten them with a wrench. Put the ACL200 lens on the Askar Vixen-style dovetail plate, connect them with two M6×8 socket head cap screws.\u003c\/span\u003e\u003cbr style=\"text-align: justify;\"\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(97, 97, 97); font-family: \" microsoft yahei simsun helvetica font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"http:\/\/www.askarlens.com\/Upload\/162754586949.jpg\" type=\"image\" style=\"border: 0px; vertical-align: middle; color: rgb(97, 97, 97); font-family: \" microsoft yahei simsun helvetica font-size: text-align: justify width:\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013705199727,"sku":"ACL200-EAF","price":156.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/162754565273__84007.jpg?v=1766560214"},{"product_id":"askar-fra500-astrograph","title":"Askar FRA500 Astrograph","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAskar FRA500 is typically a wonderful mix of pragmatism and aesthetics. The astrograph shows smooth lines and a sound layout of components. From the front, the Askar FRA500 has an impressive dew shield decorated with a classic bright-red bezel ring. The total length of FRA500 is 452mm when the dew shield is stretched out and 410mm when contracted back. At the tail end of the astrograph locates a 3.5\" massively-built focuser with dual-speed hand knobs (twin knobs for coarse adjustment and one 1:10 fine adjustment knob), which is of great use in real observation or astrophotography.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe astrograph wears smooth coating and is evenly finished. The graduation inside of the focuser is quite clear and easily readable. The focuser is tough and solid, and on the left side of it, there is a standard finder base with a silver thumb screw. So the FRA500 can piggyback carry finders, guiders or other potential astronomy accessories.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAskar FRA500 comes also with a pair of sought-after tube rings. On the top of the tube rings attached a handle and at the bottom, there is an Askar Losmandy-style dovetail plate. The combination of milk-white main tube and dew shield together with a high-gloss piano-black focuser makes the optical tube assembly calm and deep which is offset by the bright red decorative ring and tube rings.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar FRA500 is 410mm long and weighs about 4kg , so it’s quite convenient for users to carry around or mount on an EQ mount. It’s particularly suitable for astronomy enthusiasts who frequently engage in long-distance trips or out-door astrophotography.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAskar FRA500 together with the FRA- family is well received for large aperture, fast speed, delicate focusing system, unique optical design and the subsequently high-quality imaging results. Wish the Askar FRA500 be a loyal companion alongside your journey of astrophotography.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013705625711,"sku":"FRA500","price":2899.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1629350823__22501.jpg?v=1766560222"},{"product_id":"f3-9-full-frame-reducer-for-fra400-fra500","title":"F3.9 Full Frame Reducer for FRA400\/FRA500","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-size: 12pt; text-align: justify; font-family: Arial;\"\u003eAskar provides a brand-new F3.9 full frame reducer for FRA400 astrograph, further reducing the focal length and thus shortening the exposure time on its original 400 focal length and f\/5.6 focal ratio design basis. The reduction factor is 0.7×, and the reduced focal length is 280mm, which can satisfy most deep-sky astrophotography. The back focus is standard 55mm. The reducer has built-in M48×0.75 thread, easy for the attachment of 2\" filters.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013705789551,"sku":"FRA400\/500 Reducer","price":397.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1588757507__61682.jpg?v=1766560228"},{"product_id":"askar-107phq-super-apo","title":"Askar 107PHQ Super APO","description":"\u003cdiv align=\"center\" style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 60px 0px 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei center font-size:=\"\" text-align:=\"\" line-height:=\"\"\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eAs the first long-focal-ratio Flatfield astrograph from Askar, 107PHQ is born with a special mission: whether you are just getting started in astrophotography, or an enthusiast who has been quite familiar with all equipment and devices, you can always find Askar 107PHQ a useful astrograph which is functionally practical and physically attractive.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eIt's especially amateur or beginner friendly since you don't need to attach an extra field flattener to get a satisfactory picture. And for the fact that you don't need a flattener and you can easily get over back-focus calculation and confusing connection steps, all you need to do is to equip your 107PHQ with any possible imaging devices, make the target stay at the focus, and then the whole optical system is perfect for imaging.  Askar 107PHQ, a versatile all-rounder.  Askar 107PHQ can literally be applied in any conceivable situations, and that’s the top reason why 107PHQ is produced: to slash as much trouble for users as possible.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"text-align: center; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"text-align: center; font-family: Arial;\"\u003eThe sleek 107PHQ is assembled with high-quality CNC-machined components and wrapped with smooth coating. The calm and seriousness is offset by the bright green decorative rings or knobs. The 3.4\" rigid focuser is capable of handling a load of 8kg. It’s designed with a long travel distance of 95mm, which is suitable for visual observation. And it's been optimized especially for astrophotography.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"text-align: center; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: center;\"\u003eThe built-in Flatfield lens is a great contribution to Askar 107PHQ’s imaging ability. It supports 44mm full-frame imaging. The stars around the corner of the images seldom suffer from distortion or deformation. At the center of its field of view, the RMS radius is merely 3um. Even a fastidious user can also be satiated when it comes to the shape of stars. Askar 170PHQ can effectively handle with problems of field curvature and vignette.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\u003cspan style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"text-align: center; font-family: Arial;\"\u003eThe standard package includes an Askar 107PHQ OTA, a set of four-piece M86-M48 adapters, a pair of tube rings, a 300mm Askar Vixen-style dovetail plate and a high-quality aluminum suitcase.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013742653551,"sku":"107PHQ","price":3334.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1648111037__64264.jpg?v=1766561453"},{"product_id":"askar-80phq-refractive-astrograph","title":"Askar 80PHQ Refractive Astrograph","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei center font-size:=\"\" text-align:=\"\"\u003eAskar introduces the brand-new 80PHQ refractive astrograph, and it’s the second long-focal-ratio astrograph from the PHQ- family.\u003c\/span\u003e\u003cdiv\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003eThe overall finish of 80PHQ is evenly painted. The ivory and flawless coating of the main tube feels comfortably pimply, which can not only increase your grip, preventing the telescope from slipping off from your sweaty hands, but also improve its texture, avoiding the tedious monotony.  \u003c\/span\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003eA pair of clamshell-style CNC-manufactured black tube rings tightly hold the OTA. So you can just turn two locking screws to loosen or tighten the tube rings simplifying the setup by avoiding the frequent use of small tools like Allen wrenches or socket head screws. \u003c\/span\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003eThe bright green dust cap, handle, locking screws, focusing knob and decorative rings add more energy and vitality to the otherwise deep and profound astrograph. White and green is the classic combination for PHQ series. \u003c\/span\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003eThere is a 3\" rack-and-pinion rigorous focuser on the rear end of the telescope. It’s a smooth focusing unit with dual-speed adjustment. 80PHQ’s rotator is marked with precise graduation which makes your previous subjective adjustment more accurate.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"text-align: center; font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003eThe Askar 80PHQ inherits the optical design of the PHQ- family, adopting a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness. It’s worth mentioning that all astrographs from PHQ- family come with an integrated lens combination rather than simply placing three major lenses and a corrector together in a line. In another word, the whole optical system cannot solely perform without any piece of these lenses. This structure design leads to a more rational lens arrangement, better vignette control and superior image quality. The focal ratio of 80PHQ is f\/7.5. It’s a “long” focal-ratio astrograph compared with other counterparts from Askar. It’s a little bit longer even compared with 107PHQ which is f\/7 in focal ratio.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"text-align: center; font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"text-align: center; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eSome users may be frustrated that it’s hard to make a trade-off between 107PHQ and 80PHQ, since there seems to be so much in common. And especially for those who are new to astrophotography, the complicated designations and confusing numbers are really a major obstacle when they hopefully try to pick out just the proper one from oceans of dazzling products.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eIndeed, 170PHQ and 80PHQ are similar in many aspects partially because they are both the newly-developed refractive astrographs from the same family. However even if they all have excellent mechanical design and sophisticated optical system, there are noticeable differences between these two.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cdiv style=\"\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eAt the first glance, Askar 80PHQ is much more compact. 107PHQ is 603mm in length and weighs 5.7kg whereas 80PHQ is 448mm in length and weighs 3.9kg. So if your equatorial mount is not capable of holding heavy telescopes, or if you are quite tired of carrying a bulky long focal-ratio telescope travelling all around, then 80PHQ may be a great option.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eLike 107PHQ, you don't need to calculate the back focus distance within the connection limit. Besides, users don't need to add an extra 1× flattener due to its powerful flatfield optical design, which simplifies the operation.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left; font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e \u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013742981231,"sku":"80PHQ","price":2174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1648111412__64065.jpg?v=1766561462"},{"product_id":"askar-fra300-pro-quintuplet-astrograph","title":"Askar FRA300 Pro Quintuplet Astrograph","description":"\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family:\" arial new roman color:black\u003eSince their\r\ninception, Askar FRA series short focal ratio astrograph have been very well\r\nreceived by astronomical amateurs. This year, we launched the Askar FRA300 Pro —— the\r\nsmallest 60mm F\/5 Petzval astrograph with the fastest native focal ratio in the\r\nFRA series so far, its focal length is 300mm. The star is sharp and delicate.\r\nAt the center of its field of view, the RMS radius can reach 2um. Even a\r\nserious user can also be satisfied when it comes to the shape of stars. It\r\nperforms excellence with full-frame and supports 44mm imaging, which is a rare\r\nastrograph for amateur astronomers. Compared with F\/6 or F\/7,F\/5 can\r\neffectively reduce the exposure time, helps you get the same exposure in less\r\ntime. In addition, the entire OTA is compact, making it the portable choice for\r\nfield photographers.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eThe Askar FRA300 Pro 's\r\nobjective lens adopts a quintuplet fully air-spaced structure, including one\r\npiece of ED glass, it also adopts a fully-multi-coating to effectively remove\r\nstray light.\u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family:\" arial new roman color:black\u003eIn particular, the\r\nrear group lens adopts the two pieces of far-separated refractive lenses, which\r\nimproves both the star quality and the aberration correction performance , and\r\nhas a very good control of full-frame peripheral light reduction.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eThanks to the\r\nnative Petzval design, the user does not need to calculate the backfocus, as\r\nlong as the focus is within a certain range is the optimal position.\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family:\" arial yahei color:black\u003e\r\n\u003cbr\u003e\r\nMechanically\u003c\/span\u003e\u003cspan style=\"font-family:\" microsoft yahei mso-ascii-font-family:arial arial\u003e,\u003c\/span\u003e\u003cspan style=\"font-family:\" arial yahei color:black\u003eFRA300 Pro is\r\nassembled with high-quality CNC-machined components , wrapped with smooth spray\r\ncoating and light oxidation process, both beautiful and practical. The tube\r\nring design is equally lightweight and stylish. Despite the increased cost, we\r\nwant enthusiasts to use the FRA300 Pro that perform well in every way and are\r\nconsidered in every detail.\u003c\/span\u003e\u003cspan style=\"font-family:\" arial mso-fareast-font-family: new roman mso-fareast-language:en-ca\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eThe focuser is\r\n2.5\"rack-and-pinion focuser, which is solid and beautiful. It's designed\r\nwith dual-speed hand knobs, twin knobs for coarse adjustment and a fine\r\nadjustment knob to accurate the focus, equipped with a universal M48X0.75\r\nthread adapter. There are also two separate M54X0.75 and M48X0.75 adapters in\r\nthe standard kit for easy access to a variety of imaging equipment and\r\naccessories. The end is equipped with a 360° rotator, which is convenient for\r\nusers to rotate at any angle when shooting. \u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp class=\"MsoNormal\" style=\"margin-bottom:0cm;line-height:normal\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eFRA300 Pro also\r\ncomes standard with a multi-function handle and a 300mm vixen-style dovetail\r\nplate, which can be directly connected to various mounts and accessories, the\r\nmulti-functional handle can also be connected to the universal vixen-style\r\nfinder base. The 300mm dovetail plate allows the astrograph to maintain balance\r\non the mount.\u003c\/span\u003e\u003c\/p\u003e\u003cbr class=\"innova\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013766639727,"sku":"FRA300","price":1376.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FRA300-1__96609.jpg?v=1766562372"},{"product_id":"askar-multi-connection-finder-plate-150","title":"Askar Multi-connection finder plate 150","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAskar MCP150 (Multi-Connection Plate 150) is a professional design especially for FRA600\/5.6 astrograph.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eBut it also works well with other various handles provided by our company.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSo the MCP150 is actually a universal plate for all potential devices equipped with a standard Vixen dovetail foot.\u003c\/span\u003e\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013794263151,"sku":"MCP150","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1604295269__69315.jpg?v=1766562971"},{"product_id":"askar-107phq-130-150-phq-universal-reducer","title":"Askar 107PHQ\/130\/150 PHQ Universal reducer","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: Arial; font-size: 14px;\"\u003eAskar’s new-launched 3” 0.7x full-frame reducer adapts for 107PHQ \u0026amp; 130PHQ.  \u003c\/span\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:=\"\"\u003eIt has a triplet design with one ED glass. \u003c\/span\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003eThe 0.7x reduction gives 107PHQ a shortened focal ratio of 4.9 and a shortened focal length of 524mm. This reducer, connected with the astrographs, can  effectively shorten the exposure time and dramatically increase your field of view, bringing more convenience and possibilities for your deep-sky astrophotography.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013794394223,"sku":"107PHQ-Reducer","price":557.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1655171628__85803.jpg?v=1766562978"},{"product_id":"askar-65phq","title":"Askar 65PHQ","description":"\u003cspan style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: 12pt; color: rgb(68, 68, 68); font-family: Arial;\"\u003e65PHQ has a smaller size than other PHQ astrographs. 65PHQ has a focal ratio of f\/6.4 and a focal length of 416mm. Instead of the quadruplet structure of other PHQs, the 65PHQ is a quintuplet with two ED glasses which offers excellent control of chromatic and other aberrations. With its self-flattening design, 65PHQ offers strong advantages in the astronomical shooting. It supports the full-frame image circle and has a fine spot diagram with tiny distortions of the peripheral stars.\u003c\/span\u003e\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr style=\"font-size: 12pt;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68);\"\u003e65PHQ comes with a telescopic lens hood, a high-quality CNC machined and painted tube, and attractive decorative parts. The OTA weighs 2kg, and the full package with tube rings, etc. weighs 2.8kg. The 2.5” rigid focuser comes with a new-type 360° rotator with scales and a finder base. M68, M54, and M48 camera adapters are also attached, and the M48 adapter has a 2” female thread for installing filters.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); text-align: justify;\"\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); text-align: justify;\"\u003eIt is also a nice choice for your visual observation. With different diagonals and various eyepieces and it can also achieve a perfect focus. It can even be used to observe planets with a super-high magnification eyepiece. The 65PHQ contains a multifunctional handle, a 300mm dovetail plate, and sturdy double tube rings. It is small in size and light in weight, which perfectly caters to your need for viewing and shooting.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013799506031,"sku":"65PHQ","price":1304.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1669614699_252520-_252520Edited__57188.1682636037.1280.1280.jpg?v=1766563134"},{"product_id":"askar-m54-oag","title":"Askar M54 OAG","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eAskar introduced M54 off-axis guider for astronomy enthusiasts to achieve better guiding effect. The prism of Askar M54 OAG is 10×10mm, which can not only collect more light, but also make it easier to capture the targeted star and realize automatic guiding.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eAskar M54 OAG is designed with multiple threads, like M42, M48 and M54, which can basically satisfy the needs of accessory attachment. These novice-friendly adapters are easy to switch and replace. Askar M54 OAG functions well with a full-frame camera, better facilitating the imaging process of astrophotographers. Askar M54 OAG is CNC machined. The surface of the device is solid and smooth with delicate matte black finish.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/163548229665.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/163548295341.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/163548229665.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/163548295341.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013814481007,"sku":"ASK-M54-OAG","price":286.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OAG__07985.jpg?v=1766563506"},{"product_id":"askar-multifunctional-filter-drawer","title":"ASKAR Multifunctional Filter Drawer","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eUsers are often racked by the task of choosing and matching dazzling filters as well as adapters when it comes to using a filter drawer. It just becomes more confusing for those who are quite new to astrophotography. To solve this problem, Askar introduces a multifunctional filter drawer. The major feature or strength of this filter drawer is its integration of the most marketable filters, telescope and astronomy camera adapters. Users basically don’t need to worry about the related issues any more with this five-in-one filter installation device.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/164030982185.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\" width:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003ch3 style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify text-align:=\"\"\u003eBasic Components\u003c\/h3\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003ctable border=\"1\" cellspacing=\"0\" width=\"100%\" style=\"outline: none; border-collapse: collapse; border-spacing: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003ctbody style=\"outline: none; box-sizing: border-box;\"\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eName\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eMain body of Askar filter drawer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eaccommodate the filter slider;\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003econnect the telescope and the astronomy camera\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003esmooth coating;\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eclassic Askar logo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eFilter slider\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003ecarry the filters\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eswap different filters\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003edesigned with threads and circular groove for the attachment of both mounted and unmounted filters;\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\u003ethe filter slider with the smallest opening is used for the attachment of 1.25\" mounted filters and 31mm unmounted filters;\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\u003ethe middle-opening filter slider is used for the attachment of 36mm unmounted filters;\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\u003ethe slider with the largest opening is used to attach 2\" mounted filters and 50mm unmounted filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eAdapters at the telescope side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto connect the filter drawer and the telescope\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003edesigned with M42, M48 and M54 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eAdapters at the camera side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto connect the filter drawer and the camera\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003edesigned with M42, M48 and M54 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eFilter holding ring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto securely hold the unmounted filter\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003ethree different sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\n\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM2×4 countersink screw\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM1.27 wrench\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto fix the filter holding ring onto the filter slider\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\n\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM3×2.5 grub screw\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM1.5 wrench\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto adjust the space between the main body and the camera adapter\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"outline: none; box-sizing: border-box; text-align: center;\"\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 132px;\"\u003e\n\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM3×8 countersink screw\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eM2 wrench\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 199px;\"\u003eto fix the camera adapter on the main body\u003c\/td\u003e\n\u003ctd style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; width: 236px;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/164031069643.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; width: 0px;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003ch3 style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eAssembly Steps\u003c\/h3\u003e\n\u003c\/div\u003e\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\n\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eUsers have to follow the certain steps to successfully assembly the Askar filter drawer and put it into the light path to fit the whole optical system:\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e1. take out the main body of Askar filter drawer\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e2. choose a proper camera adapter according to the thread type of your astronomy camera\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e3. fix the camera adapter on the main body with 5 M3×8 countersink screws and wrench of M2\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e4. choose a proper telescope adapter according to the thread type of your telescope\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e5. thread on the telescope adapter\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e6. connect the filter drawer and your telescope\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e7. connect your astronomy camera and the filter drawer\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e8. make sure that these accessories are tightly connected and the whole system has a correct back focus. You can add extra spacers(optional) to reach the required back focus\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e9. choose a proper filter slider according to the filter you are going to use. If it’s a 1.25\" or 2\" mounted filter, directly thread it onto the filter slider. And if it’s a 31mm, 36mm or 50mm unmounted filter, gently put the filter into the circular groove and superimpose a filter holding ring, fix the holding ring with 3 M2×4 countersink screws and the wrench of M1.27 to securely hold the filter between.\u003c\/div\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e10. Insert the filter slider into the Askar filter draw and it’s ready for astrophotography\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\n\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/164031075611.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; width: 0px;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/164031347270.jpg\" type=\"image\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; width: 1080px;\"\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013818577007,"sku":"ASK-M54-DRW","price":238.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1640310505__45738.jpg?v=1766563752"},{"product_id":"askar-fma180-pro","title":"Askar FMA180 Pro 40mm f\/4.5 APO Astrograph","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Askar FMA180 Pro is a compact 40mm f\/4.5 sextuplet air-spaced APO astrograph designed for deep-sky astrophotography and visual observation. Building on the original FMA180, the Pro model introduces a 360° camera rotator, integrated finder base with bracket, and an internal focusing mechanism — all in a lightweight 0.8 kg package that delivers outstanding chromatic aberration correction across a 44mm full-frame image circle.\u003c\/p\u003e\n\n\u003cp\u003eThe sextuplet optical design uses a three-lens-front, three-lens-rear configuration with two ED (extra-low dispersion) glass elements, providing excellent colour correction and contrast across the full image field. The result is a sharp, flat, and colour-neutral image from edge to edge — well-suited for both one-shot colour and monochrome camera setups.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSextuplet APO Design\u003c\/strong\u003e — Six air-spaced lenses with 2× ED glass for exceptional chromatic aberration correction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Focusing Mechanism\u003c\/strong\u003e — Promotes stability and eliminates image shift during focus adjustments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° Camera Rotator\u003c\/strong\u003e — Allows framing adjustments without repositioning the mount\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Finder Base \u0026amp; Bracket\u003c\/strong\u003e — Supports guide cameras or finder scopes directly on the OTA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e150mm Vixen Dovetail Plate Included\u003c\/strong\u003e — Ready to mount on any Vixen-compatible saddle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-Frame Coverage\u003c\/strong\u003e — 44mm image circle supports APS-C and full-frame sensors\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Field Reducer\u003c\/strong\u003e — Optimized optical path for fast f\/4.5 imaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in 2\" Filter Thread\u003c\/strong\u003e — M48×0.75 rear connection with integrated 2\" filter thread for narrowband or broadband filters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Use\u003c\/strong\u003e — Can be used as a standalone astrograph or mounted to another telescope's finder base as a guide scope (with Vixen plate detached)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact and Lightweight\u003c\/strong\u003e — 167.5mm total length and 0.8 kg make it ideal for travel, dual-rig setups, and lightweight mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOptical Design\u003c\/h2\u003e\n\u003cp\u003eThe FMA180 Pro uses a sextuplet air-spaced APO configuration — three lenses in front and three in the rear — two of which are ED glass elements. This design provides the chromatic aberration correction of a premium apochromat in a physically short tube, enabling a fast f\/4.5 focal ratio at just 180mm focal length. The 55mm standard back focus and M48×0.75 rear thread ensure compatibility with a wide range of imaging cameras, filter drawers, and off-axis guiders.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's New Compared to the FMA180\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAdded 360° rotator for framing flexibility\u003c\/li\u003e\n  \u003cli\u003eAdded integrated finder base and bracket for guide scope or finder scope mounting\u003c\/li\u003e\n  \u003cli\u003eInternal focuser design replaces external focuser for improved rigidity\u003c\/li\u003e\n  \u003cli\u003e150mm Vixen dovetail plate included in the package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eImaging Performance\u003c\/h2\u003e\n\u003cp\u003eThe FMA180 Pro has been used to image a wide range of deep-sky objects including the Rosette Nebula, Orion Nebula, Spaghetti Nebula, Horsehead Nebula, IC 443, NGC 2174, and more — paired with cameras such as the ZWO ASI2600MM Pro, ASI294MC, and ASI294MM Pro. Its fast focal ratio and full-frame coverage make it well-suited for wide-field nebula imaging, Milky Way photography, and multi-panel mosaics.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSextuplet air-spaced APO with 2× ED glass\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm (full-frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e167.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.8 kg (including tube ring and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRear Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 with built-in 2\" filter thread\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eInternal focusing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotator\u003c\/td\u003e\n\u003ctd\u003e360°\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003e150mm Vixen\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage Contents\u003c\/td\u003e\n\u003ctd\u003eFMA180 Pro OTA, instruction manual\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAskar FMA180 Pro OTA (with integrated rotator and finder base)\u003c\/li\u003e\n  \u003cli\u003e150mm Vixen dovetail plate\u003c\/li\u003e\n  \u003cli\u003eM48×0.75 rear adapter\u003c\/li\u003e\n  \u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCamera connection: M48×0.75 with built-in 2\" filter thread\u003c\/li\u003e\n  \u003cli\u003eStandard 55mm back focus is compatible with most imaging cameras and filter accessories\u003c\/li\u003e\n  \u003cli\u003eWorks as a guide scope or finder when mounted via finder base bracket (Vixen dovetail removed)\u003c\/li\u003e\n  \u003cli\u003eCompatible with ZWO ASIAIR, N.I.N.A., Ekos\/KStars, and other capture platforms via standard M48 connection\u003c\/li\u003e\n  \u003cli\u003eAF Kit available separately (Askar FMA180 Pro AF Kit — SKU: FMA180PRO-AF-KIT)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013819461743,"sku":"FMA180Pro","price":637.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FMA180__77144.png?v=1766563855"},{"product_id":"askar-color-magic-duo-narrowband-6nm-d1-h-a-o-iii-imaging-filter-2-mounted","title":"Askar Color Magic Duo-Narrowband 6nm \"D1\" H-a \u0026 O-III Imaging Filter - 2\" Mounted","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eFor all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’ s new-launched 6nm deep-sky Duo-narrowband Filter set colour Magic is a professional astrophotography tool specifically designed for deep-sky imaging.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThis 6nm filter set has a narrow bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 6nm Duo-narrowband Filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAt the same time, the Colour Magic 6nm deep-sky Duo-narrowband Filter has very good halation control, providing more contribution to your astrophotography.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha)\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha) has an ultra-high transmittance over 90% at its center wavelength (500.7nm and 656.3nm). Askar 6nm Duo-narrowband Filter can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the Askar 6nm Duo-narrowband Filter are still very good. You can get astronomical images of high quality with just one duo-narrowband filter and an ordinary astronomical colour camera.\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha) is ideal for photographing emission nebulae, planetary nebulae or supernova remnants, and has a very high transmittance at the central wavelength. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/span\u003e\u003c\/div\u003e\n\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003e\u003c\/span\u003e\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003e\u003cspan style=\"font-family: Arial;\"\u003e6nm Duo-narrowband Filter (OIII \u0026amp; Ha) 2”\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eFWHM: 6nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eCWL: 500.7nm \u0026amp; 656.3nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003ePeak transmittance:90%\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eThickness:1.85 ± 0.05mm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eBarrier property:=OD5 @ 200-1100nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eSurface finish:60\/40\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eParallelism:30”\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013854720111,"sku":"ASK-D1","price":463.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D1__61407.1682636061.1280.1280.jpg?v=1766564673"},{"product_id":"askar-colour-magic-6nm-d-filter-package","title":"Askar Colour Magic 6nm D Filter Package","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eFor all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’ s new-launched 6nm deep-sky Duo-narrowband Filter set colour Magic is a professional astrophotography tool specifically designed for deep-sky imaging.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThis 6nm filter set has a narrow bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 6nm Duo-narrowband Filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eAt the same time, the Colour Magic 6nm deep-sky Duo-narrowband Filter has very good halation control, providing more contribution to your astrophotography.\u003c\/span\u003e\u003cdiv\u003e\n\u003cdiv style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eAfter the 2\" 6nm duo-narrowband filter (Ha+OIII), Askar ColourMagic Specially launches the SII+OIII 2\" 6nm duo-narrowband filter, which is further convenient for astronomy enthusiasts while maintaining quality. When shooting with the 2\" 6nm duo-narrowband filter (Ha+OIII) and a color camera, users will have remarkable results.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eUsually in astrophotography, the Ha signal-to-noise ratio is stronger while the OIII is relatively weak. As our two duo-narrowband filters are Ha+OIII and SII+OIII, the combination can balance the signal-to-noise ratio of each channel when shooting, and after software processing, it can achieve the ideal result almost as well as shooting with a combination of three narrowband filters and mono camera.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eWe name the  Ha+OIII 2\" 6nm duo-narrowband filter “D1” and the SII+OIII filter “D2”, the combination of them is Askar's latest \"D\" filter set. It offers a new way for color camera users to get similar results without using a mono camera and the SHO filters.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/3_1.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eThe Askar D filter set offers a new option for astronomy enthusiasts and is sure to please.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/166684115958.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/166684105298.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013857800303,"sku":"Ask-D-Combo","price":906.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D1D2__02366.1682641095.1280.1280.jpg?v=1766564860"},{"product_id":"askar-colour-magic-6nm-deep-sky-duo-narrowband-filter-oiii-sii","title":"Askar Colour Magic 6nm Deep-sky Duo Narrowband Filter (OIII+SII)","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eFor all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’ s new-launched 6nm deep-sky Duo-narrowband Filter set colour Magic is a professional astrophotography tool specifically designed for deep-sky imaging.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThis 6nm filter set has a narrow bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 6nm Duo-narrowband Filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eAt the same time, the Colour Magic 6nm deep-sky Duo-narrowband Filter has very good halation control, providing more contribution to your astrophotography.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cstrong style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eColour Magic 6nm Duo-narrowband Filter (OIII \u0026amp; SII)\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eWhile most of the commercially available duo-narrowband filters for deep-sky astrophotography are in the Ha and OIII bands, ASKAR offers another structure: SII \u0026amp; OIII.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eWhen shooting deep-sky galaxies with colour cameras, a duo-narrowband filter in the Ha and OIII bands is often used; whereas with a mono camera, a narrowband filter in the Ha, SII and OIII bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by using SII and OIII duo-narrowband filters mentioned above.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) has an ultra-high transmittance over 90% at its center wavelength (500.7nm and 671nm). Askar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the Askar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) are still very good. It is so practical and efficient that you can get astronomical images of high quality with just one duo-narrowband filter and an ordinary astronomical colour camera.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) is ideal for photographing emission nebulae, planetary nebulae or supernova remnants, and has a very high transmittance at the central wavelength. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e6nm Duo-narrowband Filter (OIII \u0026amp; SII) 2”\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eFWHM: 6nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eCWL: 500.7nm \u0026amp; 671nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003ePeak transmittance:90%\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eThickness:1.85 ± 0.05mm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eBarrier property:=OD5 @ 200-1100nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eSurface finish:60\/40\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eParallelism:30”\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013857931375,"sku":"Ask-D2","price":463.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D2__21718.1682641096.1280.1280.jpg?v=1766564866"},{"product_id":"sharpstar-v-exchangeable-astrograph-system","title":"Askar V Modular APO Astrograph Telescope System","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Askar V is a modular APO astrograph system built around two interchangeable objective lenses and three rear optical modules. Instead of being limited to one fixed focal length, the system can be configured as a 60mm or 80mm refractor and paired with the included reducer, flattener, or extender to suit different observing and imaging targets.\u003c\/p\u003e\u003cp\u003eThe V60 objective lens uses a triplet APO design with two ED elements and operates natively at 360mm f\/6. The V80 objective lens also uses a triplet APO design with two ED elements and operates natively at 500mm f\/6.25. With the reducer, flattener, and extender modules, the Askar V becomes a flexible wide-field to medium-field imaging platform for deep-sky astrophotography and high-quality visual use.\u003c\/p\u003e\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\u003cp\u003eThe Askar V is best for astronomers who want one portable refractor system that can cover multiple focal lengths. It is a strong option for beginner-to-intermediate imagers who want room to grow, advanced imagers who want a flexible travel setup, and visual observers who want a premium APO refractor system with more configuration options than a conventional single-purpose optical tube.\u003c\/p\u003e\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModular system with both 60mm and 80mm APO objective lens options.\u003c\/li\u003e\n\u003cli\u003eIncludes reducer, flattener, and extender modules for multiple focal-length configurations.\u003c\/li\u003e\n\u003cli\u003eTriplet APO objective designs with two ED elements for improved colour correction.\u003c\/li\u003e\n\u003cli\u003eStandard 55mm back focus on the rear optical accessories for common imaging setups.\u003c\/li\u003e\n\u003cli\u003eM54 and M48 camera-side adapters with a built-in 2-inch filter thread.\u003c\/li\u003e\n\u003cli\u003eIncludes 1.25-inch and 2-inch visual adapters for visual observing.\u003c\/li\u003e\n\u003cli\u003eUseful for wide-field nebulae, star fields, galaxies, lunar viewing, and portable imaging rigs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWide-field deep-sky astrophotography with the reducer module.\u003c\/li\u003e\n\u003cli\u003eFlat-field imaging with the flattener module.\u003c\/li\u003e\n\u003cli\u003eLonger focal-length imaging or visual observing with the extender module.\u003c\/li\u003e\n\u003cli\u003eTravel astronomy setups where one optical system needs to cover multiple roles.\u003c\/li\u003e\n\u003cli\u003eVisual observing with the included 1.25-inch and 2-inch adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\u003cp\u003eThe rear accessories can be rotated to the correct 60mm or 80mm scale depending on whether the V60 or V80 objective lens is installed. The rear end of each accessory provides M54 and M48 adapter options, includes a built-in 2-inch filter thread, and uses a standard 55mm back focus for camera connection. The system also includes a 360-degree rotator, finder base, 1.25-inch and 2-inch visual adapters, and a multi-function handle that can accept a Vixen-style finder base and other accessories.\u003c\/p\u003e\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThis is a modular system, so the user must select the correct objective lens and accessory scale for each setup.\u003c\/li\u003e\n\u003cli\u003eAstrophotography users still need correct 55mm spacing, camera adapters, a camera, and a suitable mount.\u003c\/li\u003e\n\u003cli\u003eThe reducer, flattener, and extender are not interchangeable with every telescope; they are intended for the Askar V system.\u003c\/li\u003e\n\u003cli\u003eIt is not the simplest option for someone who wants a single fixed-focal-length refractor with no setup decisions.\u003c\/li\u003e\n\u003cli\u003eFor serious planetary imaging, a longer focal length telescope may be a better choice.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the Askar V good for beginners?\u003c\/h3\u003e\u003cp\u003eYes, but it is best for beginners who are comfortable learning how optical configurations work. The system is flexible, but users must choose the correct lens and rear accessory combination.\u003c\/p\u003e\u003ch3\u003eWhat is it best used for?\u003c\/h3\u003e\u003cp\u003eIt is best used for flexible deep-sky astrophotography, portable imaging, wide-field targets, and visual observing with a high-quality APO refractor system.\u003c\/p\u003e\u003ch3\u003eIs it for visual observing or astrophotography?\u003c\/h3\u003e\u003cp\u003eBoth. The Askar V supports astrophotography with reducer, flattener, and extender modules, and it also includes 1.25-inch and 2-inch visual adapters for observing.\u003c\/p\u003e\u003ch3\u003eWhat cameras or accessories can it connect to?\u003c\/h3\u003e\u003cp\u003eThe rear accessories provide M54 and M48 camera-side adapter options and use a standard 55mm back focus. The built-in 2-inch filter thread is useful for common mounted astronomy filters.\u003c\/p\u003e\u003ch3\u003eWhat makes it different from a regular refractor?\u003c\/h3\u003e\u003cp\u003eA regular refractor typically has one fixed aperture and focal length. The Askar V uses interchangeable objective lenses and rear optical modules, giving the user multiple focal-length and focal-ratio combinations in one system.\u003c\/p\u003e\u003ch3\u003eWhen should it not be recommended?\u003c\/h3\u003e\u003cp\u003eDo not choose it if the customer wants the simplest possible fixed telescope, does not want to manage optical configurations, or primarily needs a long focal length planetary telescope.\u003c\/p\u003e\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the Askar V for customers who want one premium, portable APO system that can handle multiple observing and imaging roles. It is especially attractive for imagers who like wide-field targets but also want the option to extend focal length when needed. Choose a simpler fixed refractor if you want fewer setup choices, or a larger\/longer telescope if your main goal is high-magnification planetary work.\u003c\/p\u003e\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\u003cp\u003eThe following vendor graphics show the Askar V system layout, configuration details, and optical report information.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/5b699f4f-73e3-4756-9541-ae4ab85b9c2d.jpg\" alt=\"Askar V modular APO astrograph system layout for V60 and V80 configurations\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/020d4523-d918-42b1-9cb9-736dedd8e27e.jpg\" alt=\"Askar V astrograph product configuration and accessory diagram\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/4546ff99-a021-4a77-83f0-70edf7fab689.jpg\" alt=\"Askar V modular telescope optical configuration report graphic\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/4d64c202-6f6c-4390-9809-99f629a3540b.jpg\" alt=\"Askar V astrograph technical configuration chart\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/fe79dc27-4b93-46cf-8269-e7e51aff4507.jpg\" alt=\"Askar V optical performance report chart\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/9c335bac-8067-47f3-84c4-12fb3b362cec.jpg\" alt=\"Askar V optical report and spot diagram chart\"\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013886996591,"sku":"ASK-V","price":2611.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/V1__38049.jpg?v=1766565549"},{"product_id":"askar-151phq-quadruplet-apo","title":"Askar 151PHQ Quadruplet APO","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Askar 151PHQ is a premium 151mm f\/7 flatfield quadruplet APO astrograph designed for serious deep-sky imaging and high-end visual observing. With a 1057mm focal length, two ED glass elements, and a self-flattening optical design, it delivers a large corrected field without requiring a separate field flattener for native imaging.\u003c\/p\u003e\n\u003cp\u003eThe 151PHQ is the largest model in Askar’s PHQ series and is built for astrophotographers who want refractor contrast, large-aperture light gathering, and a 60mm image circle for modern large-sensor cameras. Its longer focal length makes it especially useful for galaxies, nebula details, star clusters, and high-resolution deep-sky targets where smaller wide-field refractors may not provide enough scale.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cp\u003eThe Askar 151PHQ is best for intermediate to advanced astrophotographers, observatory users, and experienced visual observers who have a mount capable of carrying a large refractor. It is a strong choice for users moving beyond small portable refractors and into a more serious imaging platform with a large corrected field and premium mechanical construction.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e151mm aperture provides strong light-gathering performance for deep-sky imaging.\u003c\/li\u003e\n  \u003cli\u003e1057mm focal length offers useful image scale for galaxies, nebula structure, clusters, and smaller targets.\u003c\/li\u003e\n  \u003cli\u003eNative f\/7 focal ratio balances optical correction, contrast, and long-focal-length performance.\u003c\/li\u003e\n  \u003cli\u003eQuadruplet air-spaced APO design includes two ED glass elements for excellent colour correction.\u003c\/li\u003e\n  \u003cli\u003eSelf-flattening design reduces the need for a separate field flattener in native imaging mode.\u003c\/li\u003e\n  \u003cli\u003e60mm image circle supports large imaging sensors, including full-frame and larger-format camera setups.\u003c\/li\u003e\n  \u003cli\u003e3.4-inch rack-and-pinion focuser includes M68, M54, and M48 adapter support, a 360-degree rotator, and a finder base.\u003c\/li\u003e\n  \u003cli\u003eOptional 3-inch 0.7x reducer can bring the system to approximately 740mm at f\/4.9 for faster imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-resolution deep-sky astrophotography\u003c\/li\u003e\n  \u003cli\u003eGalaxy and nebula detail imaging\u003c\/li\u003e\n  \u003cli\u003eFull-frame and larger-format astronomy camera setups\u003c\/li\u003e\n  \u003cli\u003ePermanent or semi-permanent observatory systems\u003c\/li\u003e\n  \u003cli\u003ePremium refractor-based visual observing\u003c\/li\u003e\n  \u003cli\u003eLonger focal length imaging where a small wide-field refractor is not enough\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003eThe 151PHQ includes a 3.4-inch rack-and-pinion focuser with a 360-degree rotator, finder base, and rear adapter support for M68, M54, and M48 camera connections. The four-piece photographic adapter set steps the rear connection down to M48×0.75 and includes a built-in M48×0.75 filter thread. The optical system supports a 60mm image circle and is well suited to large sensors when paired with appropriate camera adapters.\u003c\/p\u003e\n\u003cp\u003eThe standard package includes the 151PHQ OTA, a pair of tube rings, a handle, an Askar 300mm Losmandy dovetail plate, a set of four photographic adapters, an aluminum case, and a manual. The optional 3-inch 0.7x flatfield reducer is not included, but can be used to reduce the system to approximately 740mm focal length at f\/4.9.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eThis is a large refractor; the OTA weighs approximately 11.6kg, and the total weight with tube rings and dovetail is approximately 13.7kg.\u003c\/li\u003e\n  \u003cli\u003eA capable equatorial mount is required. This telescope is not appropriate for light travel mounts or entry-level mounts.\u003c\/li\u003e\n  \u003cli\u003eNative f\/7 imaging is excellent for image scale and correction, but exposure times will be longer than with faster astrographs unless the optional reducer is used.\u003c\/li\u003e\n  \u003cli\u003eThe 3-inch 0.7x reducer is optional and sold separately unless specifically bundled.\u003c\/li\u003e\n  \u003cli\u003eAlthough the native optical design is self-flattening, users still need the correct mechanical adapters, secure camera connection, and accurate focus for best results.\u003c\/li\u003e\n  \u003cli\u003eThis is not the best first telescope for a beginner unless they already have a suitable mount and imaging experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the Askar 151PHQ good for beginners?\u003c\/h3\u003e\n\u003cp\u003eIt is not usually the best first astrophotography telescope. The optics are straightforward to use because the field is corrected natively, but the telescope is large and heavy and needs a capable mount, good balancing, and careful imaging setup.\u003c\/p\u003e\n\u003ch3\u003eWhat is the Askar 151PHQ best used for?\u003c\/h3\u003e\n\u003cp\u003eIt is best used for high-quality deep-sky astrophotography with large sensors, especially when you want more focal length than a compact wide-field refractor can provide.\u003c\/p\u003e\n\u003ch3\u003eIs it for visual observing or astrophotography?\u003c\/h3\u003e\n\u003cp\u003eIt is primarily an astrograph for imaging, but it can also be used for premium visual observing with the appropriate accessories. Astrophotography is the main reason to choose the 151PHQ.\u003c\/p\u003e\n\u003ch3\u003eDoes it require a separate field flattener?\u003c\/h3\u003e\n\u003cp\u003eNo separate flattener is required for native imaging. The PHQ optical design is self-flattening, which simplifies setup compared with refractors that require a dedicated flattener and strict flattener spacing.\u003c\/p\u003e\n\u003ch3\u003eWhat cameras is it compatible with?\u003c\/h3\u003e\n\u003cp\u003eThe 60mm image circle makes it suitable for full-frame astronomy cameras and larger-format imaging setups, provided the correct mechanical adapters and spacing are used for the camera system.\u003c\/p\u003e\n\u003ch3\u003eCan it be made faster for imaging?\u003c\/h3\u003e\n\u003cp\u003eYes. The optional 3-inch 0.7x flatfield reducer can reduce the system to approximately 740mm focal length at f\/4.9, which shortens exposure time and provides a wider field of view.\u003c\/p\u003e\n\u003ch3\u003eWhat kind of mount does it need?\u003c\/h3\u003e\n\u003cp\u003eBecause the complete setup with tube rings and dovetail is approximately 13.7kg before adding a camera, guide scope, focuser, and accessories, it should be paired with a mount that has a comfortable imaging payload margin.\u003c\/p\u003e\n\u003ch3\u003eWhen should it not be recommended?\u003c\/h3\u003e\n\u003cp\u003eDo not recommend this telescope for lightweight travel rigs, very small mounts, casual grab-and-go observing, or beginners who do not yet have a suitable equatorial mount and imaging workflow.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eOntario Telescope recommends the Askar 151PHQ for astrophotographers who want a premium large-aperture refractor with a long native focal length, flat imaging field, and large sensor support. It solves the problem of getting refractor-quality deep-sky images without adding a separate native field flattener. Choose a smaller PHQ or SQA model if portability, beginner friendliness, or a lighter mount requirement is more important.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following vendor-supplied graphics help show the 151PHQ optical and mechanical layout, native imaging configuration, adapter arrangement, and field performance.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/98c37934-096a-485e-9e5f-3aa0692db920.jpg\" alt=\"Askar 151PHQ optical layout and mechanical diagram for large-format astrophotography\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/307bc671-7fa9-46c6-b166-de2be86ef2b9.jpg\" alt=\"Askar 151PHQ telescope body and adapter diagram for imaging setup\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/b9152fea-5a54-4b65-beaf-6cfc05717813.jpg\" alt=\"Askar 151PHQ rear connection and accessory diagram for camera adapters\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/28082a52-4b55-4374-8169-9ff7b600ac92.jpg\" alt=\"Askar 151PHQ spot diagram and optical performance chart for deep-sky imaging\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014107656303,"sku":"151PHQ","price":6298.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/151phq__21433.png?v=1766571519"},{"product_id":"askar-160apo","title":"Askar 160APO Triplet APO Refractor Telescope","description":"\u003cp\u003eThe \u003cstrong\u003eAskar 160APO\u003c\/strong\u003e is a high-quality large-aperture 160mm f\/7 triplet air-spaced apochromatic refractor from Askar (Jiaxing Sharpstar Optical Instrument Co., Ltd.). Sitting above the 140APO in the APO series, the 160APO offers substantially more light-gathering power, a longer focal length of 1120mm, and an engineering package designed to handle heavy camera and accessory loads — all with the premium optical correction and mechanical refinement the APO series is known for.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced astrophotographers\u003c\/strong\u003e who need maximum aperture in a refractor for high-resolution deep-sky imaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eObservatory builders\u003c\/strong\u003e setting up a dedicated permanent or semi-permanent imaging platform\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGalaxy and globular cluster imagers\u003c\/strong\u003e who benefit from the 1120mm focal length for fine detail\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExperienced visual observers\u003c\/strong\u003e seeking a premium large-aperture refractor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e160mm f\/7 triplet APO optics\u003c\/strong\u003e with one ED glass element for exceptional colour correction at large aperture\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated retractable rear lens tube\u003c\/strong\u003e (115mm) with rudder-type locking ring — binoviewer-ready when contracted, full imaging access when extended\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3.5\" dual-speed rack-and-pinion focuser\u003c\/strong\u003e with 1:10 fine adjustment and 10cm travel, CNC machined with anti-reflective interior\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° high-precision rotator\u003c\/strong\u003e with locking scale markings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e400mm Losmandy dovetail plate included\u003c\/strong\u003e — engineered for the weight of this instrument on heavy-duty mounts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo finder scope bases\u003c\/strong\u003e flanking the focuser\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEAF-compatible focuser\u003c\/strong\u003e for motorized autofocus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShips in a protective aluminum case\u003c\/strong\u003e for safe storage and transport\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 1x flattener (f\/7) and 0.8x reducer (f\/5.6)\u003c\/strong\u003e available separately\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnique identification name ring\u003c\/strong\u003e on every unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-resolution deep-sky astrophotography with full-frame and APS-C cameras\u003c\/li\u003e\n  \u003cli\u003eGalaxy imaging where 1120mm focal length delivers fine structural detail\u003c\/li\u003e\n  \u003cli\u003eEmission nebula and narrowband imaging with LRGB, SHO filter sets\u003c\/li\u003e\n  \u003cli\u003eVisual observing with 1.25\" or 2\" eyepieces and diagonals\u003c\/li\u003e\n  \u003cli\u003eBinoviewer use (rear tube contracted)\u003c\/li\u003e\n  \u003cli\u003eWide-field imaging with the optional 0.8x reducer at f\/5.6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRear thread:\u003c\/strong\u003e M84 female; includes 2\"\/1.25\" visual adapters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 1x flattener:\u003c\/strong\u003e maintains f\/7; corrects field curvature and coma; built-in filter thread and adapter set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 0.8x reducer:\u003c\/strong\u003e reduces to f\/5.6; field flattening included; adapter set included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDovetail:\u003c\/strong\u003e 400mm Losmandy standard (included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEAF:\u003c\/strong\u003e Compatible with ZWO EAF and most motorized focusers (sold separately)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBinoviewer:\u003c\/strong\u003e Rear tube contracts for binoviewer compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAt 13.6kg gross weight, requires a \u003cstrong\u003every high-payload equatorial mount\u003c\/strong\u003e — look for at least 20–25kg imaging capacity\u003c\/li\u003e\n  \u003cli\u003eA \u003cstrong\u003eflattener is strongly recommended\u003c\/strong\u003e for full-frame astrophotography\u003c\/li\u003e\n  \u003cli\u003eThis is an \u003cstrong\u003eadvanced instrument\u003c\/strong\u003e for experienced imagers only — not suitable for beginners\u003c\/li\u003e\n  \u003cli\u003eFlattener, reducer, EAF, and additional accessories sold separately\u003c\/li\u003e\n  \u003cli\u003eDue to size and weight, best suited for observatory or semi-permanent setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 160APO differ from the 140APO?\u003c\/strong\u003e\u003cbr\u003e\nThe 160APO has a 31% larger aperture area, a longer 1120mm focal length (vs 980mm), a larger 400mm Losmandy dovetail, and ships in an aluminum case instead of an Oxford cloth bag. It requires a heavier mount and is better suited to permanent or observatory setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat mount does it need?\u003c\/strong\u003e\u003cbr\u003e\nAt 13.6kg gross, look for mounts with 20–25kg imaging payload — for example, a Skywatcher EQ8, iOptron CEM120, or equivalent. The included 400mm Losmandy dovetail provides excellent balance options.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the retractable tube stable for imaging?\u003c\/strong\u003e\u003cbr\u003e\nYes. The retractable rear tube is engineered for rigidity — the optical axis is maintained when extended, and the rudder-type locking ring holds it securely under camera loads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need the flattener for astrophotography?\u003c\/strong\u003e\u003cbr\u003e\nFor full-frame sensors, yes — the optional 1x flattener ensures sharp stars edge-to-edge. The 0.8x reducer also provides field flattening while shortening to f\/5.6 for faster exposures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use it for visual observing?\u003c\/strong\u003e\u003cbr\u003e\nYes. It accepts 1.25\" and 2\" eyepieces and diagonals, and is binoviewer-compatible with the rear tube contracted.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eThe Askar 160APO is one of the most capable large-aperture APO refractors available in its price class. Its combination of 160mm optics, long focal length, large Losmandy dovetail, and premium focuser makes it ideal for high-resolution deep-sky imaging — especially galaxies and faint emission nebulae where aperture and focal length make a real difference. Best matched to users with a heavy-payload equatorial mount and an established astrophotography setup. Not recommended for beginners or portable rigs.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following optical reports and technical diagrams are provided by Askar for the 160APO:\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c4c66299-8ebb-4a7f-8803-30a59af835e7.jpg\" alt=\"Askar 160APO Optical Path Diagram showing triplet APO lens configuration\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/850a58d0-a499-44f1-a227-16642dce87c5.jpg\" alt=\"Askar 160APO Spot Diagram showing star point quality across the image field\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/b288cb06-5853-4709-9b0a-e7de4729884c.jpg\" alt=\"Askar 160APO additional Spot Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/e9034687-025b-4925-b0e3-772445963f96.jpg\" alt=\"Askar 160APO Product Size Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/18edc4b2-28a4-4954-9e5a-fd16d14681ad.jpg\" alt=\"Askar 160APO Connection Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/fafe01e1-250c-41bb-bd04-81f28ef1cd08.jpg\" alt=\"Askar 160APO retractable lens tube instruction diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014108508271,"sku":"160APO","price":5383.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/APO160-a__37611.png?v=1766571575"},{"product_id":"160apo-1x-full-frame-flattener","title":"160APO 1x Full-frame Flattener","description":"\u003cp\u003e\u003cspan\u003eThe Askar 160 APO comes with three optional premium accessories, a 1.0x flattener and a 0.8x reducer. Introduced here is the 1.0x flattener, which is optimized for the Askar 160APO, and can provide more possibilities for telescope use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"ie_fimg-1736818366331\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c143bdb5-29f0-4174-ba8f-6b526dcf3732.jpg\" alt=\"长友气体\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_line-1736818366581\" class=\"ie_line\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_text-1736818366586\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eThe 1.0x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 160APO, it still maintained a focal ratio of 7. The flattener corrects field curvature and coma, resulting in flatter field edges and finer star points.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 1.0x flattener adopts a triplet design and supports a 44mm full-frame image circle.  The back focus from the M48 thread is a standard 55mm. The front thread is M92*1. At the camera end, it is equipped with M68*1, M54*0.75, and M48*0.75 three sizes of adapters, which are convenient for connection. At the same time, it has a built-in M48*0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e1x Flattener Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/d9b2c108-4323-4eef-9ba7-2fd468ea243c.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e1x Flattener Installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/6fac3c9d-95bd-414a-83dd-4ad887ac02bf.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/850a58d0-a499-44f1-a227-16642dce87c5.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014108541039,"sku":"ASK-Flat-APO-160","price":477.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/36dcdff4-2634-48ac-baae-73f8f7cb8932__39041.png?v=1766571594"},{"product_id":"160apo-0-8x-full-frame-reducer","title":"160APO 0.8x Full-frame Reducer","description":"\u003cp\u003e\u003cspan\u003eThe Askar 160 APO comes with three optional premium accessories, a 1.0x flattener and a 0.8x reducer. Introduced here is the 0.8x reducer, which is optimized for the Askar 160APO, and can provide more possibilities for telescope use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"ie_fimg-1736818366331\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c143bdb5-29f0-4174-ba8f-6b526dcf3732.jpg\" alt=\"长友气体\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_line-1736818366581\" class=\"ie_line\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_text-1736818366586\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eThe 0.8x reducer can bring Askar 160APO's focal ratio down to F5.6. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 0.8x reducer adopts a quadruplet design and supports a 44mm full-frame image circle. The back focus from the M48 thread is a standard 55mm. The front thread is M92*1. At the camera end, it is equipped with M68*1, M54*0.75, and M48*0.75 three sizes of adapters, which are convenient for connection. At the same time, it has a built-in M48*0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.8x Reducer Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/95ffac13-afa4-40d1-abfb-0be35dfbf66a.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.8x Reducer Installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/24d58b5c-6e62-4a3d-986a-861875d627e5.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cimg class=\"image_resized\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/b288cb06-5853-4709-9b0a-e7de4729884c.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014108704879,"sku":"ASK-0.8-APO-160","price":477.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_160_reducer__35581.png?v=1766571613"},{"product_id":"askar-103apo","title":"Askar 103APO Triplet APO Refractor Telescope","description":"\u003cp\u003eThe \u003cstrong\u003eAskar 103APO\u003c\/strong\u003e is a 103mm aperture, f\/6.8 triplet air-spaced apochromatic refractor designed and manufactured by Askar (Jiaxing Sharpstar Optical Instrument Co., Ltd.). Purpose-built for astrophotography, the 103APO combines a compact, lightweight form factor with a high-performance triplet APO objective that includes one element of ED glass — all at a price point that makes serious imaging accessible to more astronomers.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cp\u003eThe Askar 103APO is best suited for \u003cstrong\u003eintermediate to advanced astrophotographers\u003c\/strong\u003e who want a compact yet capable APO refractor for deep-sky imaging. It is also an excellent choice for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers\u003c\/strong\u003e targeting nebulae, galaxies, and star clusters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-use users\u003c\/strong\u003e who want a telescope capable of both imaging and visual observation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravellers and portable rig builders\u003c\/strong\u003e needing a lightweight, packable APO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVisual observers\u003c\/strong\u003e who want a high-quality, colour-corrected refractor with 1.25\"\/2\" eyepiece support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e103mm f\/6.8 triplet APO optics\u003c\/strong\u003e with one ED glass element — superior chromatic aberration correction versus standard doublets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree optional correctors\u003c\/strong\u003e: 1x flattener (f\/6.8), 0.8x reducer (f\/5.4), and 0.6x reducer (f\/4) — giving the 103APO one of the widest range of focal ratios in its class\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetachable two-section lens tube\u003c\/strong\u003e — enables the 0.6x reducer and binoviewer use without additional adapters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3.3\" dual-speed rack-and-pinion focuser\u003c\/strong\u003e with 1:10 fine-focus adjustment and 10cm travel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° high-precision rotator\u003c\/strong\u003e with locking scale for repeatable framing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo finder scope bases\u003c\/strong\u003e — one on each side of the focuser for flexible accessory mounting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e290mm extended Vixen dovetail plate\u003c\/strong\u003e — compatible with most equatorial mounts; optional Losmandy plate available\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMatting felt interior dew shield and baffled tube interior\u003c\/strong\u003e for maximum stray light reduction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEAF-compatible focuser\u003c\/strong\u003e for motorized autofocus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightweight at just 5.5kg gross\u003c\/strong\u003e (including rings and dovetail)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnique identification name ring\u003c\/strong\u003e on every unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDeep-sky astrophotography with APS-C and full-frame cameras\u003c\/li\u003e\n  \u003cli\u003eWide-field imaging at f\/4 with the optional 0.6x reducer — excellent for large nebulae and star-forming regions\u003c\/li\u003e\n  \u003cli\u003eLRGB and narrowband filter imaging\u003c\/li\u003e\n  \u003cli\u003eVisual observing with 1.25\" and 2\" eyepieces or a diagonal\u003c\/li\u003e\n  \u003cli\u003eBinoviewer use (rear tube section detaches)\u003c\/li\u003e\n  \u003cli\u003eGuided astrophotography on mid-range equatorial mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRear thread:\u003c\/strong\u003e M84 female; includes 2\"\/1.25\" visual adapters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 1x flattener:\u003c\/strong\u003e maintains f\/6.8; corrects field curvature and coma; includes built-in 2\" filter thread and M54\/M48 adapters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 0.8x reducer:\u003c\/strong\u003e reduces to f\/5.4; field flattening included; M54\/M48 adapters included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 0.6x reducer:\u003c\/strong\u003e reduces to f\/4; requires rear tube detachment; M68\/M54\/M48 adapters included; ideal for wide-field imaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDovetail:\u003c\/strong\u003e 290mm Vixen standard; Losmandy dovetail optional\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEAF motorized focuser:\u003c\/strong\u003e Compatible with ZWO EAF and most third-party autofocusers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBinoviewer:\u003c\/strong\u003e Compatible when rear section is removed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eA \u003cstrong\u003eflattener or reducer is recommended\u003c\/strong\u003e for astrophotography with full-frame sensors; the bare OTA may show field curvature on large sensors\u003c\/li\u003e\n  \u003cli\u003eThe 0.6x reducer \u003cstrong\u003erequires detachment of the rear tube section\u003c\/strong\u003e — this is by design, not a deficiency\u003c\/li\u003e\n  \u003cli\u003eRequires a suitable \u003cstrong\u003eequatorial or GoTo mount\u003c\/strong\u003e for astrophotography; alt-az mounts for visual use only\u003c\/li\u003e\n  \u003cli\u003eNot recommended as a first telescope for beginners unfamiliar with equatorial mounts\u003c\/li\u003e\n  \u003cli\u003eAll reducers\/flatteners and EAF are sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 103APO good for beginners?\u003c\/strong\u003e\u003cbr\u003e\nIt is better suited to intermediate users who already understand polar alignment, guiding, and basic astrophotography workflows. Complete beginners may find a simpler setup more approachable first.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between the three optional correctors?\u003c\/strong\u003e\u003cbr\u003e\nThe 1x flattener keeps f\/6.8 and corrects edge aberrations. The 0.8x reducer shortens to f\/5.4 for faster exposures and wider fields. The 0.6x reducer delivers an ultra-fast f\/4 with the widest field, requiring removal of the rear tube section.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use it for visual observing?\u003c\/strong\u003e\u003cbr\u003e\nYes. The 103APO accepts 1.25\" and 2\" diagonals and eyepieces and supports binoviewer use when the rear tube is detached.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003e\nLook for an equatorial mount with at least 8–12kg imaging payload. The 290mm Vixen dovetail fits most mid-range EQ mounts; a Losmandy dovetail is available for heavier-duty setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat cameras is it compatible with?\u003c\/strong\u003e\u003cbr\u003e\nAPS-C and full-frame cameras work well. For full-frame, pair with the 1x flattener or 0.8x reducer for flat, edge-to-edge stars.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs motorized autofocus supported?\u003c\/strong\u003e\u003cbr\u003e\nYes. The focuser is compatible with ZWO EAF and most third-party electronic autofocusers (sold separately).\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eThe Askar 103APO is a standout value in the 100mm APO class. Its triplet optics, premium focuser, and exceptional range of optional correctors — including the rare f\/4 option — make it one of the most versatile compact astrographs available. If you're looking for a portable, capable refractor for deep-sky astrophotography and want the flexibility to shoot at f\/4, f\/5.4, or f\/6.8, the 103APO is hard to beat. Not the best choice for beginners or those without a compatible equatorial mount.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following optical reports and technical diagrams are provided by Askar for the 103APO:\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/4762e8b7-2864-4eb1-abbe-73c85901a578.jpg\" alt=\"Askar 103APO Optical Path Diagram showing triplet lens element configuration\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/5641f5ef-6fd6-4aaa-9405-9914eef55a55.jpg\" alt=\"Askar 103APO Spot Diagram with 1x Flattener\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/b2514716-d145-42d0-8ed0-66b9450d9ac7.jpg\" alt=\"Askar 103APO Spot Diagram with 0.8x Reducer\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/16dafd4c-e367-4689-92e5-e3f9f444acc4.jpg\" alt=\"Askar 103APO Spot Diagram with 0.6x Reducer\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/b56e16a0-7774-4019-83d3-5440c60a6e46.jpg\" alt=\"Askar 103APO Product Size Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/76104d42-e25d-4a5e-8de3-e82d81d42fb5.jpg\" alt=\"Askar 103APO Connection Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ea041ee5-da40-4df3-ac57-43702506c5cd.jpg\" alt=\"Askar 103APO Segmented Lens Tube Detachment Diagram\" style=\"max-width:100%;margin-bottom:12px;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014112079983,"sku":"103APO","price":1678.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/APO103-d__91289.png?v=1766571661"},{"product_id":"askar-130phq","title":"Askar 130PHQ","description":"\u003cp class=\"e_text-8 s_title response-transition\"\u003e130PHQ is a long-focal-ratio, flatfield astrograph newly launched after 107PHQ. Instead of buying extra flatteners, calculating the backfocus of flattener or making tedious connection to match the distance, astrophotographers can simply equip it with any possible imaging devices, make the target stay at the focus, and then the whole optical system is perfect for imaging. 130PHQ has a larger size than 107PHQ, with an aperture 23mm larger than 107PHQ. 130PHQ has a focal ratio of f\/7.7 which is longer than 107PHQ’ s f\/7, and a focal length of 1000mm. The quadruplet lens with two ED glasses offers excellent control of chromatic and other aberrations. With its self-flattening design, 130PHQ offers strong advantages in astronomical shooting. It supports a medium frame 60mm image circle, has a fine spot diagram with tiny distortion of the peripheral stars, and its central RMS radius is less than 2 microns.\u003c\/p\u003e\n\u003cdiv id=\"saf-detail-0\" class=\"cbox-15 p_loopItem\"\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cdiv id=\"ce_detail-275107\" class=\"ce_detail\" data-layout=\"flow\"\u003e\n\u003cdiv id=\"ie_grid-1667527470979\" class=\"ie_grid\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox response-transition\"\u003e\n\u003cdiv id=\"content_ie-1667527470979-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell response-transition\"\u003e\n\u003cdiv id=\"ie_grid-1667527470984\" class=\"ie_grid\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv id=\"content_ie-1667527470984-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\u003cdiv id=\"ie_text-1669603692344\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e130PHQ comes with a telescopic lens hood, a high quality CNC machined and painted tube and attractive decorative parts. The 3.4\" rigid focuser comes with M68, M54, and M48 adapters and a finder base. When used with the 3\" 0.7 x flat field reducer, the telescope can reach a focal ratio of f\/5.4 and a focal length of 700mm, effectively reducing exposure time. The multifunctional handle comes with a central slot for attaching an M6 screw with an M6 screw hole. Standard Losmandy dovetail plate, together with sturdy double tube ring, is perfectly suited for viewing and shooting.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_fimg-1669603845703\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/93f71e7e-3059-44f2-b166-12284032d9b9.jpg\" alt=\"长友气体\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/142b5de7-81b4-4e96-bfdb-f3cdead5f762.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-15 p_loopItem\"\u003e \u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014112407663,"sku":"130PHQ","price":5074.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/PHQ130-a__97306.png?v=1766571673"},{"product_id":"askar-c1-duo-band-ha-oiii-filter","title":"Askar C1 Duo-band Ha+OIII filter","description":"\u003cp\u003e\u003cspan\u003eColour Magic C1 Duo-band filter (Hα+OIII) has a high transmittance of over 90% at its center wavelength (500.7nm and 656.6nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing the contrast throughout the image， enhancing the contrast of your pictures, and making it easier to display the details of the stars. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC1 Duo-band Filter (OIII \u0026amp; Ha) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e OIII：35nm±5nm\/Ha：15nm±3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e500.7nm \u0026amp; 656.6nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e90%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eOD3 @ 200-1000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Filters VS D Filters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg id=\"1744242701691588608\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/d9fc62ca-200d-4a8d-97da-271704275a65.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg id=\"1737360492640669696\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/ee17a63e-9952-4318-948b-5c899d9a6cb1.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-2\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-3\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg id=\"1737361294995132416\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/7793cf4b-19ea-4534-8384-94312e50ffa8.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIC 1848 Soul Nebula(HOO)  |  ASKAR 103APO+0.6x Full-frame Reducer+ASI 2600MC Pro  |  Colour Magic C1 Duo-band Filter (Hα+OIII)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014116307055,"sku":"Colourmagic-C1","price":169.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_C1__52135.png?v=1766571845"},{"product_id":"colour-magic-c2-duo-band-filter-sii-oiii","title":"Colour Magic C2 Duo-band Filter (SII+OIII)","description":"\u003cp\u003e\u003cspan\u003eColour Magic C 2\" Duo-band filter is a professional astrophotography tool specifically designed for deep-sky imaging. The Colour Magic C2 duo-band filter is SII+OIII filter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"ie_text-1703049718429\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eWhen shooting deep-sky galaxies with color cameras, a duo-band filter in the Hα +OⅢ bands is often used; whereas with a mono camera, a narrowband filter in the Hα, SⅡ, and OⅢ bands is often used, leaving users with color cameras missing one band of nebula detail. This can be compensated by using the Colour Magic C Duo-band filter (SⅡ+OIII) mentioned above.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_text-1703049761038\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eColour Magic C2 Duo-band filter (SII+OIII) has a high transmittance of over 90% at its center wavelength (500.7nm and 672nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing the contrast throughout the image， enhancing the contrast of your pictures, and making it easier to display the details of the stars. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC2 Duo-band Filter (OIII \u0026amp; SⅡ) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e OIII：35nm±5nm\/SⅡ：15nm±3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e500.7nm \u0026amp; 672nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e90%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eOD3 @ 200-1000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Filters VS D Filters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg id=\"1744242701691588608\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/d9fc62ca-200d-4a8d-97da-271704275a65.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg id=\"1737360492925882368\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/323c00e7-5b5e-4cd0-aa35-63b46d222edc.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-2\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-3\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg id=\"1737361320663388160\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/b2dd3440-07a9-4ff9-8aa9-47dc53dfa253.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIC 1848 Soul Nebula(SOO)  |  ASKAR 103APO+0.6x Full-frame Reducer+ASI 2600MC Pro  |  Colour Magic C2 Duo-band Filter (SII+OIII)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014116470895,"sku":"Colourmagic-C2","price":169.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_C2__16649.png?v=1766571859"},{"product_id":"71f-flat-field","title":"Askar 71F 71mm f\/6.9 Flat-Field APO Astrograph","description":"\u003ch2\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eAskar 71F Flat-Field APO Astrograph\u003c\/strong\u003e is a lightweight, compact 71mm quadruplet refractor designed for both astrophotography and visual observing. With a 490mm focal length and native f\/6.9 focal ratio, it offers a practical balance of portability, reach, and corrected imaging performance.\u003c\/p\u003e\u003cp\u003eThe 71F uses a quadruplet air-spaced APO optical design with one ED glass element. Its self-flattened design supports a 44mm full-frame image circle, allowing imagers to use the telescope without purchasing a separate field flattener or calculating traditional backfocus spacing before imaging.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThis telescope is best for astrophotographers who want a portable, corrected refractor for wide-field deep-sky imaging, as well as visual observers who want a compact APO refractor that can also serve as an imaging OTA.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-flattened optical design:\u003c\/strong\u003e The 71F does not require a separate field flattener for standard imaging use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-frame ready:\u003c\/strong\u003e The 44mm image circle supports full-frame imaging sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuadruplet APO optics:\u003c\/strong\u003e The air-spaced quadruplet design includes one ED glass element to help control chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable build:\u003c\/strong\u003e The OTA weighs only 2.5kg, with a 3.0kg gross weight including the tube rings and dovetail plate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging-friendly mechanics:\u003c\/strong\u003e Includes a 2.4\" dual-speed rack-and-pinion focuser, 1:10 fine adjustment, and a 360° rear rotator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible connection options:\u003c\/strong\u003e The photographic adapter system includes M48×0.75 and M54×0.75 connections with a built-in 2\" filter thread.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWide-field deep-sky astrophotography\u003c\/li\u003e\n\u003cli\u003eFull-frame imaging setups\u003c\/li\u003e\n\u003cli\u003ePortable refractor imaging rigs\u003c\/li\u003e\n\u003cli\u003eVisual observing with compatible eyepieces and accessories\u003c\/li\u003e\n\u003cli\u003eTravel-friendly astronomy setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe Askar 71F includes a set of photographic adapters, a pair of tube rings, a handle, and a 230mm Vixen-style dovetail plate. The dovetail plate includes slotted 1\/4\" and 3\/8\" screw holes for direct tripod attachment. The focuser provides M64×0.75, M54×0.75, and M48×0.75 rear-end connection options depending on the adapter configuration.\u003c\/p\u003e\u003cp\u003eThe telescope also includes multiple finder mounting options, with a finder slot on the handle and two finder bases on the focuser body. Sharpstar\/Askar also shows optional EAF installation support on the product page.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eTechnical Diagrams\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe following Sharpstar\/Askar technical diagrams are included for setup planning, mechanical spacing, accessory connection, and imaging performance reference.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/8fea8184-f19b-4167-8000-5f6b82ffbc68.jpg\" alt=\"Askar 71F product size diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003e71F Connection Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c4e96a62-154d-46ae-9c4c-c056597265dc.jpg\" alt=\"Askar 71F connection diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eLocking Screw Position Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/fb7489d3-de4a-4c26-bcae-55a86166d738.jpg\" alt=\"Askar 71F locking screw position diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eEAF Installation Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/6a4a88e7-e8b7-494c-b196-f987f67b375a.jpg\" alt=\"Askar 71F optional EAF installation diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/bbb48223-3f1a-4483-a38f-d799c720a9e6.jpg\" alt=\"Askar 71F EAF installation detail diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Path Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/41058961-83a2-4a2d-a246-9f289d69c42b.jpg\" alt=\"Askar 71F optical path diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/a91f2077-d8ca-4b0c-a2e2-fb08ce115b2b.jpg\" alt=\"Askar 71F spot diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot a fast reducer setup by default:\u003c\/strong\u003e The native focal ratio is f\/6.9. A reducer, if desired, is a separate accessory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging train planning still matters:\u003c\/strong\u003e The telescope is self-flattened, but users still need the correct mechanical adapters, camera spacing within the available focuser travel, and sufficient focus travel for their setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount capacity matters:\u003c\/strong\u003e The OTA is compact, but total system weight increases with camera, guide scope, filter wheel, focuser motor, and other accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\u003ch3\u003e\u003cstrong\u003eDoes the Askar 71F need a separate field flattener?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eNo. The 71F is designed as a self-flattened astrograph, so a separate flattener is not required for standard imaging use.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCan the Askar 71F cover a full-frame camera?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eYes. Sharpstar\/Askar lists a 44mm image circle, which is suitable for full-frame imaging.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat is the focal length?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe native focal length is 490mm.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat focuser does it use?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 71F uses a 2.4\" dual-speed rack-and-pinion focuser with 1:10 fine adjustment and a 360° rear rotator.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat is included in the standard package?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe listed standard package includes the 71F OTA, tube rings, handle, 230mm Vixen dovetail plate, and photographic adapters.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eOur Recommendation\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the Askar 71F for imagers who want a compact, full-frame-capable refractor with built-in field correction and no separate flattener requirement. It is a strong choice for portable deep-sky imaging setups where simplicity, corrected optics, and manageable weight are priorities.\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014120206447,"sku":"71F","price":939.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/71Fa__59523.png?v=1766572032"},{"product_id":"lrgb-filters-1-25","title":"LRGB Filters 1.25\"","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB imaging filter set is designed for those imagers who possess a monochrome camera that use either CCD or CMOS sensors. This filter set enables users to achieve 1:1:1 equalized RGB exposures.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe LRGB filter set includes four mounted imaging filters that pass red, green and blue bands of light together with the full luminance spectrum across the visible band. By taking individual photos with each of the the filters with the help of a monochrome astronomy camera and combining the separate photos with image-processing applications or software, you will get a stunning image of the planets or deep-sky objects. The Askar LRGB imaging filter can greatly simplify and thus reduce the time of post processing.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB filter set has a precise passband including a gap between the red and the green to improve color balance and partially reduce the impact from sodium light. The blue and green filter passbands slightly overlap to allow the emission from nebulae to get a more natural color imaging. The RGB color combination has an equal weight, it means that each color is weighted to approximately 1:1:1, which is critical for automated imaging. Askar LRGB filter set is suitable for planetary or deep-sky object imaging.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar LRGB filter set rejects the infrared wavelengths so users don’t need to get an extra IR CUT filter. The Askar LRGB filter set has a terrific transmission at least 90% across its bandpass.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar LRGB filter set is individually examined and tested to ensure that they can satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Designed for monochrome astronomy cameras with CCD or CMOS sensors.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Useful for imaging color pictures of galaxies, star clusters and nebulae.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission can greatly enhance the contrast and bring out the most detailed information of celestial objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003e· Designed to partially cut off the inference of artificial light from sodium vapor street lights and other unwanted disturbance.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar LRGB filter set is parfocal across all the filters.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44038681133167,"sku":"A-LRGB-1","price":249.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1611712311__66460.1682640785.1280.1280__67513.jpg?v=1767595380"},{"product_id":"askar-131f-flat-field-quadruplet-astrograph","title":"Askar 131F Flat-Field Quadruplet Astrograph","description":"\u003ch2\u003eAskar 131F Flat-Field Quadruplet Astrograph — 131mm f\/7.5\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 131F Flat-Field\u003c\/strong\u003e is a premium 131mm aperture quadruplet APO astrograph designed for serious deep-sky astrophotographers and visual observers who want a large-aperture, plug-and-shoot instrument with no compromises. Built around a self-flattening quadruplet optical design — three elements at the front, one correcting element at the rear — the 131F delivers a flat, fully corrected image circle of 44mm, covering full-frame sensors without the need for a separate field flattener.\u003c\/p\u003e\n\n\u003cp\u003eWith a 983mm focal length at f\/7.5, the 131F occupies an ideal position for wide-field deep-sky imaging: enough aperture to collect serious light on faint nebulae and galaxies, and a focal ratio that keeps exposure times manageable. One piece of ED (extra-low dispersion) glass in the optical group keeps chromatic aberration tightly controlled across the full field.\u003c\/p\u003e\n\n\u003cp\u003eTrue to the Askar F Series philosophy, backfocus calculation is completely eliminated. Simply attach your camera adapter, achieve focus, and begin imaging — no spacer math, no flattener purchase required. The included photographic extension tube features a built-in 2-inch filter thread and ships with both M48×0.75 and M54×0.75 adapter options, covering a wide range of DSLR and dedicated astronomy cameras.\u003c\/p\u003e\n\n\u003cp\u003eThe mechanical package is equally well considered: a precision 3-inch rack-and-pinion focuser with 1:10 fine-focus adjustment, a built-in 360° camera rotator, a retractable dew shield, two finder scope bases, and a 300mm Losmandy-style dovetail plate — all finished in the iconic Askar blue-and-white CNC-machined tube body.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntermediate and advanced astrophotographers\u003c\/strong\u003e who want to step up to a large-aperture, full-frame-capable astrograph without the complexity of external flatteners or backfocus calculations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers\u003c\/strong\u003e targeting nebulae, galaxy clusters, and large emission regions who want both resolution and field width in a single instrument.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOne-scope-for-everything users\u003c\/strong\u003e — the 131F performs equally well for visual observing with standard 1.25\" and 2\" eyepieces, making it genuinely dual-purpose.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImagers who use full-frame cameras\u003c\/strong\u003e — the 44mm image circle fully covers Sony, Nikon, and Canon full-frame sensors as well as large dedicated astronomy sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eObservers who prefer a clean, streamlined workflow\u003c\/strong\u003e — the self-flattening design removes setup variables and lets you focus on the sky.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 131F?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-flattening quadruplet design\u003c\/strong\u003e — no separate field flattener to buy, no backfocus distance to calculate. Attach and shoot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-frame sensor coverage\u003c\/strong\u003e — the 44mm image circle covers all modern full-frame DSLR and mirrorless sensors as well as large-format dedicated astronomy cameras.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eED glass chromatic control\u003c\/strong\u003e — a single ED element in the quadruplet group suppresses false colour across the entire image field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in 360° camera rotator\u003c\/strong\u003e — frame your target at any angle without repositioning the entire telescope.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium 3\" R\u0026amp;P focuser with 1:10 fine adjustment\u003c\/strong\u003e — large-format, low-flex focuser suited to heavy camera payloads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose: imaging and visual\u003c\/strong\u003e — the included 1.25\"\/2\" visual adapter makes the 131F a capable visual telescope alongside its imaging role.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComprehensive standard package\u003c\/strong\u003e — tube rings, handle, 300mm Losmandy dovetail plate, and photographic adapter set are all included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRetractable dew shield\u003c\/strong\u003e — practical field protection without adding to transport length.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky astrophotography (nebulae, galaxy groups, star-forming regions)\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR and mirrorless astrophotography\u003c\/li\u003e\n  \u003cli\u003eDedicated astronomy camera imaging (mono and colour sensors)\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging (2\" filter thread built-in)\u003c\/li\u003e\n  \u003cli\u003eVisual deep-sky observing with 1.25\" and 2\" eyepieces\u003c\/li\u003e\n  \u003cli\u003eDual-rig or multi-telescope observatory setups\u003c\/li\u003e\n  \u003cli\u003eAstrophotography club and outreach use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCamera compatibility:\u003c\/strong\u003e The 131F ships with M48×0.75 and M54×0.75 photographic adapters. DSLR users will need their camera's standard T-ring. Dedicated astronomy camera users with M42, M54, or M48 connections are directly supported. The built-in 2-inch filter thread on the extension tube accepts standard 2\" astronomy filters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMount compatibility:\u003c\/strong\u003e The included 300mm Losmandy-style dovetail plate is compatible with any mount that accepts a standard Losmandy D-plate saddle. At 7.9kg (OTA) and 9.4kg gross, a robust equatorial mount — such as a Sky-Watcher EQ6-R, iOptron CEM70, or equivalent — is recommended for imaging use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e The Askar 131F 0.74× reducer is available separately to bring the system to approximately f\/5.6 for faster imaging. Electronic focuser motor adapters are compatible with the 3\" focuser for remote or automated focus control.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGuiding:\u003c\/strong\u003e Two built-in finder bases allow a guide scope to be mounted directly on the tube. Dedicated guide scopes such as the Askar 52mm guide scope series are compatible.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight requires a capable mount\u003c\/strong\u003e — at 9.4kg with rings and dovetail, this telescope needs a mid- to heavy-duty equatorial mount. It is not suited to lightweight travel mounts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ef\/7.5 is not ultrafast\u003c\/strong\u003e — for very faint targets in light-polluted skies, the optional 0.74× reducer (sold separately) is recommended to achieve f\/5.6 for shorter exposures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot ideal for planetary or lunar imaging\u003c\/strong\u003e — the 983mm focal length and f\/7.5 ratio are optimized for wide-field deep sky; high-power planetary work benefits from longer focal lengths.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge instrument\u003c\/strong\u003e — at up to 1026mm total length with the dew shield extended, this is a full-size observatory-class refractor. Travel and portability should be considered.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo electronic focuser included\u003c\/strong\u003e — the focuser is manual; an electronic focuser motor is available separately if motorized focus control is desired.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a field flattener with the Askar 131F?\u003c\/strong\u003e\u003cbr\u003e\nNo. The self-flattening quadruplet design produces a flat field natively. No separate flattener purchase is required, and no backfocus distance calculation is needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it cover a full-frame sensor?\u003c\/strong\u003e\u003cbr\u003e\nYes. The 44mm image circle fully covers all current full-frame DSLR, mirrorless, and dedicated astronomy camera sensors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs it suitable for beginners?\u003c\/strong\u003e\u003cbr\u003e\nThe 131F is best suited to intermediate or advanced users who already have a capable equatorial mount and some experience with astrophotography. The self-flattening design does remove significant complexity, but the telescope's size, weight, and price point are more appropriate for experienced observers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat camera connections does it support?\u003c\/strong\u003e\u003cbr\u003e\nThe standard adapters cover M48×0.75 and M54×0.75 connections. DSLR users need a standard camera T-ring. Most dedicated astronomy cameras (ZWO, QHY, Player One, etc.) with M54 or M48 connections attach directly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use it for visual observing?\u003c\/strong\u003e\u003cbr\u003e\nYes. The included 1.25\"\/2\" visual adapter lets you use standard eyepieces. The 131mm aperture and 983mm focal length provide excellent wide-field visual views of open clusters, nebulae, and galaxies.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003e\nA mount rated for at least 12–15kg of payload is recommended for imaging. Examples: Sky-Watcher EQ6-R Pro, iOptron CEM70, Rainbow RST-135, or equivalent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs a reducer available?\u003c\/strong\u003e\u003cbr\u003e\nYes. The Askar 131F 0.74× reducer (sold separately) reduces the focal ratio to approximately f\/5.6, enabling faster exposures and a wider field of view.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat makes it different from similarly priced astrographs?\u003c\/strong\u003e\u003cbr\u003e\nThe self-flattening quadruplet design is the key differentiator — you get a flat field across a 44mm image circle without buying or collimating an additional flattener. The built-in 360° rotator, 3\" focuser, and full accessory package also add significant real-world value over comparable bare OTAs.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 131F Flat-Field\u003c\/strong\u003e for astrophotographers who are ready to step up to a large-aperture, full-frame-ready instrument and want the simplest possible imaging workflow. The self-flattening design is genuinely useful — it eliminates an entire category of compatibility and spacing problems that trip up even experienced imagers. Paired with a capable equatorial mount and a modern astronomy camera, the 131F is an exceptionally capable deep-sky imaging system.\u003c\/p\u003e\n\n\u003cp\u003eIf you are a beginner, a lighter and simpler telescope will serve you better while you develop your technique. If you primarily image planets or the Moon, a longer focal length instrument is a better match. But if wide-field deep-sky imaging on full-frame sensors is your goal, the Askar 131F is one of the most complete, ready-to-image packages available at this aperture class.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\n\u003cp\u003eThe following optical and mechanical diagrams are provided for customers who wish to review the Askar 131F's optical performance data, mechanical dimensions, connection specifications, and assembly details before purchasing or setting up the instrument.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/8a883eef-96d8-4147-a206-fe1420dd4855.jpg\" alt=\"Askar 131F Product Size Diagram - mechanical dimensions and tube length measurements\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/a9e9b79d-844c-4873-9502-9cc87b6f3bf8.jpg\" alt=\"Askar 131F Product Size Diagram - additional mechanical dimensions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/dbaae082-9703-4ccc-a319-b6dedcb3e3d8.jpg\" alt=\"Askar 131F Connection Diagram - photographic adapter and camera connection threading specifications\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/37f4ab88-3b9a-4c66-88f2-1674920272bb.jpg\" alt=\"Askar 131F Locking Screw Position Diagram - focuser and adapter locking screw locations\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/1acc5643-0b25-4789-a1b5-11c889ba55e2.jpg\" alt=\"Askar 131F Electronic Focuser Assembly Diagram - motorized focuser motor mounting instructions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/e9cb86dc-bee7-488c-89ef-47160eaf5769.jpg\" alt=\"Askar 131F Optical Path Diagram - quadruplet lens group layout and light path illustration\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/96389167-369e-4ff4-bbd2-43768e5ac17d.jpg\" alt=\"Askar 131F Spot Diagram - optical star spot performance across full-frame image circle\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154388476015,"sku":"131F-FLAT-FIELD","price":2798.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1114d666-31b5-46c4-85c4-3c57ff6d48e7.png?v=1779666429"},{"product_id":"askar-111f-flat-field-quadruplet-astrograph","title":"Askar 111F Flat-Field Quadruplet Astrograph","description":"\u003ch2\u003eAskar 111F Flat-Field Quadruplet Astrograph — 111mm f\/6.9\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 111F Flat-Field\u003c\/strong\u003e is a 111mm aperture, 766mm focal length quadruplet APO astrograph built around Askar's proven self-flattening design philosophy. At a native f\/6.9 focal ratio, it sits between the compact 91F and the larger 131F in the F Series lineup — offering meaningful aperture and a relatively fast ratio in a package that tops out under 6kg with rings and dovetail, making it compatible with a wider range of equatorial mounts than its larger sibling.\u003c\/p\u003e\n\n\u003cp\u003eThe optical design uses four air-spaced elements — three in the front group and one correcting element in the rear — with one piece of ED glass to manage chromatic aberration across the full field. An internal baffle in the tube body further reduces stray light, and the system natively supports a 44mm image circle covering full-frame sensors. Like all F Series telescopes, it requires no separate field flattener and no backfocus calculation: connect your camera, achieve focus, and begin imaging.\u003c\/p\u003e\n\n\u003cp\u003eThe mechanical package is comprehensive: a 3\" rack-and-pinion focuser with 1:10 fine adjustment, a built-in 360° camera rotator, a retractable dew shield, two finder scope bases on the tube plus one on the handle, and a 300mm Vixen-style dovetail plate with 1\/4\" and 3\/8\" tripod screw holes. The tube body is precision CNC-machined in the signature Askar blue-and-white finish.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntermediate astrophotographers\u003c\/strong\u003e stepping up from a smaller instrument who want full-frame sensor coverage with no flattener complexity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers\u003c\/strong\u003e targeting nebulae, galaxy groups, and emission regions where 111mm of aperture provides meaningful light collection advantage over sub-100mm instruments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount-limited users\u003c\/strong\u003e who want more aperture than the 91F but need to stay within the payload range of mounts like the Sky-Watcher HEQ5, iOptron CEM40, or equivalent.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose users\u003c\/strong\u003e who want both astrophotography and visual observing capability in one instrument, since the 111F accepts standard 1.25\" and 2\" eyepieces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBudget-conscious upgraders\u003c\/strong\u003e who want a large-image-circle full-frame astrograph at a lower price point than the 131F.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 111F?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-flattening quadruplet\u003c\/strong\u003e — no additional flattener needed, no backfocus distance to calculate. Attach your camera and shoot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e44mm full-frame image circle\u003c\/strong\u003e — covers full-frame DSLR, mirrorless, and large dedicated astronomy camera sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eED glass chromatic control\u003c\/strong\u003e — one ED element in the quadruplet group suppresses false colour across the entire image field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in 360° camera rotator\u003c\/strong\u003e — frame your target at any angle without moving the telescope.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3\" R\u0026amp;P focuser with 1:10 fine adjustment\u003c\/strong\u003e — large-format, low-flex focuser with fine control protective cap.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple finder base positions\u003c\/strong\u003e — finder scope can be repositioned between handle slot and focuser-side bases without disassembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLighter than the 131F\u003c\/strong\u003e — at 6.76kg gross (with rings and Vixen dovetail), compatible with a broader range of imaging mounts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2\" filter thread built-in\u003c\/strong\u003e — the photographic extension tube accepts standard 2-inch astronomy filters directly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky astrophotography (nebulae, galaxy clusters, emission regions)\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR and mirrorless astrophotography\u003c\/li\u003e\n  \u003cli\u003eDedicated astronomy camera imaging (ZWO, QHY, Player One, Touptek, etc.)\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging\u003c\/li\u003e\n  \u003cli\u003eVisual deep-sky observing with 1.25\" and 2\" eyepieces\u003c\/li\u003e\n  \u003cli\u003eModerate-payload equatorial mount imaging setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e Ships with M48×0.75 and M54×0.75 photographic adapters. DSLR users need a standard camera T-ring. The built-in 2\" filter thread on the extension tube accepts standard astronomy filters. Most dedicated astronomy cameras with M54 or M48 nose threads connect directly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMount compatibility:\u003c\/strong\u003e The 300mm Vixen-style dovetail plate fits any Vixen-compatible saddle. The 1\/4\" and 3\/8\" holes allow direct tripod mounting. At 6.76kg gross, mounts rated for 10–12kg imaging payload are appropriate — such as the Sky-Watcher HEQ5 Pro, iOptron CEM40, ZWO AM5, or equivalent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e The Askar 111F 0.74× Reducer (sold separately) drops the system to approximately f\/5.1 (566mm focal length) for wider-field, faster imaging. An electronic focuser motor is available separately for remote focus control.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGuiding:\u003c\/strong\u003e Two finder bases on the focuser body plus the handle slot provide three guide scope mounting positions. Compatible with Askar 52mm guide scope series and other standard guide scopes.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ef\/6.9 is not ultrafast\u003c\/strong\u003e — for very faint targets in light-polluted skies, the optional 0.74× reducer (sold separately) is recommended.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot ideal for planetary or lunar imaging\u003c\/strong\u003e — optimized for wide-field deep sky, not high-magnification planetary detail.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo electronic focuser included\u003c\/strong\u003e — motorized focus requires a separately purchased focuser motor.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot a beginner instrument\u003c\/strong\u003e — most appropriate for users with an equatorial mount and some astrophotography experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a field flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The self-flattening quadruplet design produces a flat field natively across the 44mm image circle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it cover full-frame sensors?\u003c\/strong\u003e\u003cbr\u003eYes. The 44mm image circle covers all current full-frame DSLR, mirrorless, and dedicated astronomy camera sensors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eA mount rated for 10–12kg payload is recommended for imaging. Examples: Sky-Watcher HEQ5 Pro, iOptron CEM40, ZWO AM5N, or equivalent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does the 111F compare to the 91F?\u003c\/strong\u003e\u003cbr\u003eThe 111F has 22% more aperture (111mm vs 91mm), a slightly faster native ratio (f\/6.9 vs f\/6.7), and a longer 766mm focal length vs 609mm. It is heavier (5.74kg net vs 3.92kg) and does not include eyepieces or an erecting prism in the standard package. The 91F is better for users with smaller mounts or who want a more complete visual\/travel kit out of the box.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does the 111F compare to the 131F?\u003c\/strong\u003e\u003cbr\u003eThe 131F has more aperture (131mm) and a longer focal length (983mm) but is significantly heavier (7.9kg net) and requires a heavier-duty mount. The 111F is the better choice for users with mid-weight mounts who still want full-frame coverage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs a reducer available?\u003c\/strong\u003e\u003cbr\u003eYes. The Askar 111F 0.74× Reducer (sold separately) reduces the system to f\/5.1 and 566mm focal length.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 111F Flat-Field\u003c\/strong\u003e for astrophotographers who want a meaningful aperture upgrade over a 60–91mm instrument while keeping the system weight manageable for mid-range equatorial mounts. The self-flattening design eliminates the most common source of setup complexity for newer imagers, and the full-frame image circle means the optics will not limit you as your camera equipment evolves. It is a strong all-round deep-sky imaging platform at a competitive price point in the 100–120mm aperture class.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\n\u003cp\u003eThe following diagrams are provided for customers who wish to review the optical performance data, mechanical dimensions, and connection specifications of the Askar 111F before purchasing or setting up the instrument.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/454295a5-664d-43a2-9b8e-1b65a715a593.jpg\" alt=\"Askar 111F Product Size Diagram - tube length and mechanical dimensions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/39e3d53e-59fa-4ba9-bb6a-d46e147a0f0b.jpg\" alt=\"Askar 111F Product Size Diagram - additional dimension reference\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/d77cda7c-afa8-4052-9c88-e7ad4d7a8ac1.jpg\" alt=\"Askar 111F Connection Diagram - photographic adapter and camera thread connection details\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/37f4ab88-3b9a-4c66-88f2-1674920272bb.jpg\" alt=\"Askar 111F Locking Screw Position Diagram - focuser and adapter lock locations\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/1acc5643-0b25-4789-a1b5-11c889ba55e2.jpg\" alt=\"Askar 111F Electronic Focuser Assembly Diagram - motor mounting instructions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/d7da6964-5f63-4a1b-add1-645d41eba620.jpg\" alt=\"Askar 111F Optical Path Diagram - quadruplet lens group and light path layout\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/d3529dd7-ba1a-4553-af4b-787d4e747dc3.jpg\" alt=\"Askar 111F Spot Diagram - star spot performance across full-frame image circle\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154393686127,"sku":"111F-FLAT-FIELD","price":2098.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ee178691-b536-4f04-81d1-9acd6a365330.png?v=1779667136"},{"product_id":"askar-91f-flat-field-quadruplet-astrograph","title":"Askar 91F Flat-Field Quadruplet Astrograph","description":"\u003ch2\u003eAskar 91F Flat-Field Quadruplet Astrograph — 91mm f\/6.7\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 91F Flat-Field\u003c\/strong\u003e is a 91mm aperture, 609mm focal length quadruplet APO astrograph and the most accessible telescope in the Askar F Series. At a native f\/6.7 focal ratio, it combines a compact and lightweight build — just 3.92kg OTA — with the same self-flattening, full-frame-capable optical performance that defines the entire F Series lineup.\u003c\/p\u003e\n\n\u003cp\u003eThe four-element optical design (three front elements, one rear correcting element) includes one piece of ED glass to suppress chromatic aberration. The system natively supports a 44mm image circle covering full-frame sensors with no external flattener required and no backfocus calculation needed. Simply attach your camera, achieve focus, and begin imaging.\u003c\/p\u003e\n\n\u003cp\u003eThe 91F is the most complete package in the F Series out of the box: in addition to the standard photographic extension tube with M48×0.75 and M54×0.75 adapters, it ships with an 8mm eyepiece (76×), a 20mm eyepiece (30×), and a 1.25\" 45° erecting prism — making it immediately ready for visual observing, birdwatching, and terrestrial use the moment it arrives.\u003c\/p\u003e\n\n\u003cp\u003eThe mechanical package includes a 3\" R\u0026amp;P focuser with 1:10 fine adjustment, a 360° camera rotator, a retractable dew shield, a matting-felt-lined tube interior, two finder bases on the focuser plus a handle slot, and a 230mm Vixen-style dovetail plate with 1\/4\" and 3\/8\" tripod holes. The exterior features the signature Askar blue-and-white CNC-machined finish.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeginner to intermediate astrophotographers\u003c\/strong\u003e who want a full-frame-capable, self-flattening instrument with no setup complexity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravel and portable rig users\u003c\/strong\u003e — at 3.92kg OTA and a maximum length under 640mm with dew shield extended, it pairs well with compact travel mounts like the ZWO AM5, iOptron HEM27, Sky-Watcher Star Adventurer GTi, and similar.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose visual and imaging users\u003c\/strong\u003e — the included eyepiece and erecting prism kit makes it ready for daytime spotting and nighttime visual observing right out of the box.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBirders and nature observers\u003c\/strong\u003e looking for a versatile, optically excellent spotting scope that doubles as an astrograph.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers on smaller mounts\u003c\/strong\u003e who need a flat-field full-frame instrument within a tight weight budget.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 91F?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-flattening quadruplet\u003c\/strong\u003e — no separate flattener, no backfocus calculation. Attach and shoot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e44mm full-frame image circle\u003c\/strong\u003e — covers all modern full-frame DSLR, mirrorless, and dedicated astronomy sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightest F Series telescope\u003c\/strong\u003e — at 3.92kg OTA (4.52kg gross), suitable for the widest range of mounts including travel-grade systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMost complete standard package\u003c\/strong\u003e — the 91F includes 8mm and 20mm eyepieces plus a 1.25\" erecting prism, unlike the larger F Series models.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eED glass chromatic control\u003c\/strong\u003e — one ED element minimizes false colour across the full image field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in 360° rotator\u003c\/strong\u003e — frame targets at any angle without repositioning the mount.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMatting felt interior\u003c\/strong\u003e — stray light absorption lining inside the tube for better contrast.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRetractable dew shield\u003c\/strong\u003e — compact for transport, extended for use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTripod-mountable dovetail\u003c\/strong\u003e — 230mm Vixen plate with 1\/4\" and 3\/8\" screw holes for direct tripod use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky astrophotography (nebulae, star clusters, large emission regions)\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR, mirrorless, and dedicated astronomy camera imaging\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging (built-in 2\" filter thread)\u003c\/li\u003e\n  \u003cli\u003eVisual deep-sky observing with included 8mm and 20mm eyepieces\u003c\/li\u003e\n  \u003cli\u003eBirdwatching, wildlife, and terrestrial spotting\u003c\/li\u003e\n  \u003cli\u003eTravel and portable mount setups\u003c\/li\u003e\n  \u003cli\u003eBeginner astrophotography and astronomy outreach\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e Ships with M48×0.75 and M54×0.75 adapters. DSLR users need a standard T-ring. Dedicated astronomy cameras with M54 or M48 connections attach directly. Built-in 2\" filter thread on the extension tube accepts standard astronomy filters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMount compatibility:\u003c\/strong\u003e The 230mm Vixen dovetail fits any Vixen-compatible saddle. The 1\/4\" and 3\/8\" tripod holes allow direct tripod mounting without a mount at all. At 4.52kg gross, compatible with lightweight mounts including ZWO AM5, iOptron HEM27, Sky-Watcher HEQ5, Star Adventurer GTi, and similar. A mount rated for at least 6–8kg payload is recommended for imaging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e The Askar 91F 0.75× Reducer (sold separately) brings the system to f\/5 and 455mm focal length for wider-field, faster imaging. An electronic focuser motor is available separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIncluded visual accessories:\u003c\/strong\u003e 8mm eyepiece (76× magnification), 20mm eyepiece (30× magnification), and 1.25\" 45° erecting prism for correct-image terrestrial and astronomical viewing.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmaller aperture than 111F\/131F\u003c\/strong\u003e — 91mm collects less light than larger F Series instruments; exposures will be longer on faint targets. Consider the optional 0.75× reducer or a larger telescope for very faint, small-scale objects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ef\/6.7 is moderate speed\u003c\/strong\u003e — not ultrafast; the optional 0.75× reducer (sold separately) brings it to f\/5 for shorter exposures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot ideal for planetary imaging\u003c\/strong\u003e — the 609mm focal length is optimized for wide-field deep sky, not high-magnification planetary detail.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo electronic focuser included\u003c\/strong\u003e — motorized focus requires a separately purchased motor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The self-flattening quadruplet produces a flat field across the 44mm image circle natively.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it cover full-frame sensors?\u003c\/strong\u003e\u003cbr\u003eYes. The 44mm image circle fully covers all current full-frame DSLR, mirrorless, and dedicated astronomy cameras.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs it good for beginners?\u003c\/strong\u003e\u003cbr\u003eYes — it is the most beginner-friendly instrument in the F Series. The included eyepieces and erecting prism mean it can be used for visual observing immediately, and the self-flattening design removes the most common astrophotography setup hurdle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eFor imaging, a mount rated for at least 6–8kg payload is recommended. For visual use only, it can be used on a camera tripod via the built-in tripod screw holes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs a reducer available?\u003c\/strong\u003e\u003cbr\u003eYes. The Askar 91F 0.75× Reducer (sold separately) reduces the system to f\/5 and 455mm focal length.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does it compare to the 111F?\u003c\/strong\u003e\u003cbr\u003eThe 91F is lighter (3.92kg vs 5.74kg), shorter, includes eyepieces and an erecting prism, and is better suited for smaller mounts and travel. The 111F has more aperture and a longer focal length for more resolution on smaller targets.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use it for birdwatching?\u003c\/strong\u003e\u003cbr\u003eYes. The included 20mm eyepiece and erecting prism give a correct-image view for terrestrial spotting. It functions as an excellent spotting scope in addition to its astronomy role.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 91F Flat-Field\u003c\/strong\u003e as the best entry point into the F Series for most buyers. It is the lightest, most portable, and most complete package — ready for visual observing, birdwatching, and astrophotography the moment it arrives. If you are using a compact or travel mount, or you want one instrument that handles astronomy and daytime optics equally well, the 91F is an outstanding choice.\u003c\/p\u003e\n\n\u003cp\u003eIf you need more aperture for fainter targets or higher resolution and have a heavier mount, consider the 111F or 131F. But for first-time F Series buyers and travel users, the 91F delivers the full F Series experience in the most accessible package.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\n\u003cp\u003eThe following optical and mechanical diagrams are provided for customers who wish to review the Askar 91F’s optical performance, mechanical dimensions, and connection specifications.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/6d3433e9-069f-4e8f-8fe5-f64659c95b6e.jpg\" alt=\"Askar 91F Product Size Diagram - tube length and mechanical dimensions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/d8b7fe34-d5d0-4555-bbc9-ead405dfacf2.jpg\" alt=\"Askar 91F Connection Diagram - photographic adapter and camera thread connection details\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/37f4ab88-3b9a-4c66-88f2-1674920272bb.jpg\" alt=\"Askar 91F Locking Screw Position Diagram - focuser and adapter lock locations\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/1acc5643-0b25-4789-a1b5-11c889ba55e2.jpg\" alt=\"Askar 91F Electronic Focuser Assembly Diagram - motor mounting instructions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/fabf66d1-bbc7-47d2-95d9-13cbfcf8d59e.jpg\" alt=\"Askar 91F Optical Path Diagram - quadruplet lens group and light path layout\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/9204b293-5dea-45bd-a45d-91db45661241.jpg\" alt=\"Askar 91F Spot Diagram - star spot performance across the full-frame image circle\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154396504175,"sku":"91F-FLAT-FIELD","price":1398.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/4a0aa511-087e-46a0-897a-b099e77a876e.png_560xaf.webp?v=1779668266"},{"product_id":"askar-131f-0-74-focal-reducer","title":"Askar 131F 0.74× Focal Reducer","description":"\u003ch2\u003eAskar 131F 0.74× Focal Reducer — For the Askar 131F Flat-Field Astrograph\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 131F 0.74× Reducer\u003c\/strong\u003e is a dedicated focal reducer designed exclusively for the Askar 131F Flat-Field astrograph. It reduces the 131F’s native f\/7.5 focal ratio down to f\/5.6, shortening the effective focal length from 983mm to 733.6mm. This delivers a wider field of view and significantly faster exposures — roughly 80% of the original exposure time — making it particularly valuable for capturing large nebulae, expansive star fields, faint emission structures, and fast-moving or time-sensitive celestial events.\u003c\/p\u003e\n\n\u003cp\u003eIn addition to reducing the focal ratio, the reducer incorporates built-in field-flattening correction that eliminates field curvature across the 44mm full-frame image circle. Stars remain sharp and round from the centre of the frame to the corners, with no additional flattener required at the reduced focal ratio.\u003c\/p\u003e\n\n\u003cp\u003eThe optical design uses a triplet lens group for smooth, well-corrected reduction across the full field. The standard back focus distance is 55mm measured from the M48×0.75 male thread. Both ends of the reducer body feature M72×1 threads. The package includes M54×0.75 and M48×0.75 adapter rings for direct connection to the 131F’s photographic extension tube, and the rear adapter ring has a built-in M48×0.75 standard 2\" filter thread for direct filter installation. The body is precision CNC-machined and ships with protective metal thread caps on both ends.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAskar 131F owners\u003c\/strong\u003e who image large nebulae, emission regions, or wide star fields and want a broader field of view without changing telescopes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImagers in light-polluted skies\u003c\/strong\u003e who benefit from the faster f\/5.6 ratio to shorten sub-exposure times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNarrowband and broadband filter users\u003c\/strong\u003e who want the faster ratio for more efficient filter imaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAstrophotographers\u003c\/strong\u003e who want to switch between the native f\/7.5 (for tighter framing) and f\/5.6 (for wider field) without buying a second telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 131F 0.74× Reducer?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDedicated design\u003c\/strong\u003e — optically optimized specifically for the 131F, not a generic reducer. Delivers consistent correction across the full 44mm image circle at the reduced ratio.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in field flattening\u003c\/strong\u003e — no additional flattener needed at f\/5.6; the reducer handles both reduction and correction simultaneously.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFaster imaging\u003c\/strong\u003e — f\/5.6 vs f\/7.5 means roughly 44% less exposure time needed for the same signal level.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWider field\u003c\/strong\u003e — 733.6mm focal length vs 983mm gives approximately 26% more field width in each direction.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard back focus\u003c\/strong\u003e — 55mm from M48 thread eliminates guesswork; direct adapter connections included in the box.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter-ready rear\u003c\/strong\u003e — built-in M48×0.75 thread accepts standard 2\" astronomy filters without an additional adapter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCNC precision body with dust caps\u003c\/strong\u003e — professional-grade build quality with protective metal end caps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky nebula imaging with the Askar 131F\u003c\/li\u003e\n  \u003cli\u003eLarge emission and reflection nebulae (Orion, Rosette, North America, etc.)\u003c\/li\u003e\n  \u003cli\u003eGalaxy groups and clusters requiring wider framing\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging in light-polluted sites\u003c\/li\u003e\n  \u003cli\u003eTime-lapse or short-exposure widefield astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible telescope:\u003c\/strong\u003e Askar 131F Flat-Field only. Not designed for use with any other telescope.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e The 131F’s photographic extension tube connects directly to the reducer via the included M54×0.75 or M48×0.75 adapter rings. Both end threads on the reducer body are M72×1.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBack focus:\u003c\/strong\u003e 55mm from the base of the M48×0.75 male thread. No additional spacing calculation required when using the supplied adapters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFilter compatibility:\u003c\/strong\u003e The built-in rear M48×0.75 thread accepts standard 2\" (48mm) astronomy filters directly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCamera compatibility:\u003c\/strong\u003e Works with any camera system that connects via the included M54 or M48 adapter rings — DSLRs with T-rings, and dedicated astronomy cameras with M54 or M48 nose threads.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e131F only\u003c\/strong\u003e — this reducer is not compatible with the 91F, 111F, or any other telescope. Each F Series model has its own dedicated reducer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — focal reducers are imaging-only accessories and are not used with eyepieces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e55mm back focus must be respected\u003c\/strong\u003e — using spacers or adapters that change the back focus distance from the specified 55mm will degrade corner star quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does the 0.74× reducer do to the 131F?\u003c\/strong\u003e\u003cbr\u003eIt reduces the focal length from 983mm to 733.6mm and the focal ratio from f\/7.5 to f\/5.6, giving a wider field of view and faster exposures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it work on the 91F or 111F?\u003c\/strong\u003e\u003cbr\u003eNo. Each F Series telescope has its own dedicated reducer. The 91F uses the 0.75× Reducer and the 111F uses the 0.74× Reducer — both are different products.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I still need a field flattener at f\/5.6?\u003c\/strong\u003e\u003cbr\u003eNo. The reducer has field-flattening correction built in and covers the full 44mm image circle with sharp stars to the corners.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the back focus distance?\u003c\/strong\u003e\u003cbr\u003e55mm measured from the base of the M48×0.75 male thread on the rear of the reducer.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we consider the \u003cstrong\u003eAskar 131F 0.74× Reducer\u003c\/strong\u003e a worthwhile companion purchase for any 131F owner who does wide-field deep-sky imaging. The improvement in field width and exposure speed is significant, and the fact that it handles both reduction and field flattening in one unit keeps the imaging train simple. If you own a 131F and shoot large nebulae or work under moderate light pollution, this reducer will meaningfully expand what you can do with the telescope.\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154396668015,"sku":"131F-REDUCER-074X","price":418.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/39700a9a-6969-4a4b-bb2c-f65eb7ad5c26.png?v=1779667444"},{"product_id":"askar-111f-0-74-focal-reducer","title":"Askar 111F 0.74× Focal Reducer","description":"\u003ch2\u003eAskar 111F 0.74× Focal Reducer — For the Askar 111F Flat-Field Astrograph\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 111F 0.74× Reducer\u003c\/strong\u003e is a dedicated focal reducer designed exclusively for the Askar 111F Flat-Field astrograph. It reduces the 111F’s native f\/6.9 focal ratio down to f\/5.1, shortening the effective focal length from 766mm to 566mm. This produces a wider field of view and a faster optical system that reduces exposure times — making it ideal for large nebulae, expansive emission regions, and imaging sessions where efficiency matters.\u003c\/p\u003e\n\n\u003cp\u003eThe reducer incorporates built-in field-flattening correction, eliminating field curvature and ensuring sharp, round stars from the centre of the frame all the way to the corners of a 44mm full-frame image circle. No additional flattener is required at the reduced focal ratio.\u003c\/p\u003e\n\n\u003cp\u003eThe optical design features a triplet lens group for smooth, well-corrected reduction. The standard back focus distance is 55mm from the M48×0.75 male thread. Both ends of the reducer body feature M68×1 threads. The 111F’s photographic extension tube connects directly via the included M54×0.75 and M48×0.75 adapter rings. The rear adapter ring has a built-in M48×0.75 standard 2\" filter thread. The body is precision CNC-machined and ships with protective metal thread caps on both ends.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAskar 111F owners\u003c\/strong\u003e who image large nebulae or wide star fields and want a broader field of view and faster exposures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImagers in light-polluted environments\u003c\/strong\u003e who benefit from the faster f\/5.1 ratio to shorten sub-exposure times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNarrowband and broadband filter users\u003c\/strong\u003e wanting more imaging efficiency from their 111F setup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhotographers who want flexibility\u003c\/strong\u003e — switching between the native f\/6.9 (for tighter framing and higher resolution) and f\/5.1 (for wider field) without a second telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 111F 0.74× Reducer?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDedicated design\u003c\/strong\u003e — optimized specifically for the 111F; delivers consistent, well-corrected performance across the full 44mm image circle at f\/5.1.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in field flattening\u003c\/strong\u003e — one accessory handles both reduction and corner correction simultaneously.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignificantly faster system\u003c\/strong\u003e — f\/5.1 vs f\/6.9 means roughly 45% less exposure time required for the same signal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWider field\u003c\/strong\u003e — 566mm vs 766mm focal length gives approximately 26% more field width per axis.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard 55mm back focus\u003c\/strong\u003e — no spacing guesswork; direct adapter connections are included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter-ready\u003c\/strong\u003e — built-in M48×0.75 rear thread accepts standard 2\" astronomy filters directly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCNC body with protective caps\u003c\/strong\u003e — professional build quality with dust-proof metal end caps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky nebula imaging with the Askar 111F\u003c\/li\u003e\n  \u003cli\u003eLarge emission and reflection nebulae\u003c\/li\u003e\n  \u003cli\u003eGalaxy groups and wide star fields requiring broader framing\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging\u003c\/li\u003e\n  \u003cli\u003eEfficient imaging from light-polluted sites\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible telescope:\u003c\/strong\u003e Askar 111F Flat-Field only. Not compatible with the 91F, 131F, or other telescopes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Connects via the 111F’s photographic extension tube using the included M54×0.75 or M48×0.75 adapter rings. Both ends of the reducer body are M68×1 threads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBack focus:\u003c\/strong\u003e 55mm from the base of the M48×0.75 male thread. No additional spacing calculation required when using the supplied adapters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFilter compatibility:\u003c\/strong\u003e Built-in rear M48×0.75 thread accepts standard 2\" astronomy filters directly.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e111F only\u003c\/strong\u003e — this reducer is not compatible with the 91F, 131F, or any other telescope in the F Series.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — focal reducers are imaging-only accessories.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e55mm back focus must be respected\u003c\/strong\u003e — altering the back focus distance from 55mm will degrade corner star quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does this reducer do to the 111F?\u003c\/strong\u003e\u003cbr\u003eIt reduces the focal length from 766mm to 566mm and the focal ratio from f\/6.9 to f\/5.1, giving a wider field of view and faster exposures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it work on the 91F or 131F?\u003c\/strong\u003e\u003cbr\u003eNo. Each F Series telescope requires its own dedicated reducer. The 91F uses the 0.75× Reducer (M59 thread) and the 131F uses a different 0.74× Reducer (M72 thread).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a separate flattener at f\/5.1?\u003c\/strong\u003e\u003cbr\u003eNo. Field flattening is built into the reducer and covers the full 44mm image circle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the back focus distance?\u003c\/strong\u003e\u003cbr\u003e55mm from the base of the M48×0.75 male thread on the rear of the reducer.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 111F 0.74× Reducer\u003c\/strong\u003e as a natural pairing for any 111F owner who regularly images large nebulae or works under light-polluted skies. The step from f\/6.9 to f\/5.1 is meaningful in practice — combined with the wider field, it transforms the 111F into a noticeably more capable wide-field imaging system. For 111F owners who haven’t yet added a reducer, this is the one accessory most likely to expand their imaging possibilities.\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154397028463,"sku":"111F-REDUCER-074X","price":418.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1b1d4dbf-a360-4f29-a533-6f4e17a2feed.png?v=1779667504"},{"product_id":"askar-91f-0-75-focal-reducer","title":"Askar 91F 0.75× Focal Reducer","description":"\u003ch2\u003eAskar 91F 0.75× Focal Reducer — For the Askar 91F Flat-Field Astrograph\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 91F 0.75× Reducer\u003c\/strong\u003e is a dedicated focal reducer designed exclusively for the Askar 91F Flat-Field astrograph. It reduces the 91F’s native f\/6.7 focal ratio down to f\/5, shortening the effective focal length from 609mm to 455mm. This delivers a noticeably wider field of view and a faster optical system that meaningfully reduces exposure times — particularly useful for large nebulae, wide star fields, and imaging from light-polluted locations.\u003c\/p\u003e\n\n\u003cp\u003eAlongside focal reduction, the reducer incorporates built-in field-flattening correction that eliminates field curvature across the full 44mm image circle. Stars are sharp and round from the centre to the corners of a full-frame sensor, with no additional flattener required at the reduced ratio.\u003c\/p\u003e\n\n\u003cp\u003eThe optical design uses a triplet lens group for smooth, well-corrected reduction. The standard back focus distance is 55mm from the M48×0.75 male thread. Both ends of the reducer body feature M59×1 threads. The 91F’s photographic extension tube connects directly via the included M54×0.75 and M48×0.75 adapter rings. The rear adapter ring has a built-in M48×0.75 standard 2\" filter thread for direct filter installation. The body is precision CNC-machined and ships with protective metal thread caps on both ends to guard against dust when not in use.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAskar 91F owners\u003c\/strong\u003e who want a wider field of view and faster exposures for large nebulae and star fields.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImagers in light-polluted skies\u003c\/strong\u003e who benefit from the faster f\/5 ratio to shorten sub-exposure times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravel astrophotographers\u003c\/strong\u003e already using the compact 91F who want to maximise field width on a lightweight setup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNarrowband and broadband filter users\u003c\/strong\u003e who want more imaging speed from the 91F system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUsers wanting flexibility\u003c\/strong\u003e between the native f\/6.7 (tighter framing, higher resolution) and f\/5 (wider field, faster) without a second telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 91F 0.75× Reducer?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDedicated design\u003c\/strong\u003e — optically optimized specifically for the 91F for consistent, well-corrected performance across the full 44mm image circle at f\/5.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in field flattening\u003c\/strong\u003e — one accessory handles both reduction and corner correction simultaneously.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignificantly faster system\u003c\/strong\u003e — f\/5 vs f\/6.7 means roughly 44% less exposure time required for the same signal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWider field\u003c\/strong\u003e — 455mm vs 609mm focal length gives approximately 25% more field width per axis.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard 55mm back focus\u003c\/strong\u003e — no spacing guesswork; direct adapter connections are included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter-ready rear thread\u003c\/strong\u003e — built-in M48×0.75 accepts standard 2\" astronomy filters directly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightest F Series reducer\u003c\/strong\u003e — at just 0.3kg, adds virtually no weight penalty to the 91F travel setup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCNC body with protective caps\u003c\/strong\u003e — professional build quality with dust-proof metal end caps for storage and transport.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky nebula and star cluster imaging with the Askar 91F\u003c\/li\u003e\n  \u003cli\u003eLarge emission and reflection nebulae (Orion, Rosette, Heart and Soul, etc.)\u003c\/li\u003e\n  \u003cli\u003eMilky Way core and wide star field imaging\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging from light-polluted sites\u003c\/li\u003e\n  \u003cli\u003ePortable and travel astrophotography setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible telescope:\u003c\/strong\u003e Askar 91F Flat-Field only. Not compatible with the 111F, 131F, or any other telescope.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Connects via the 91F’s photographic extension tube using the included M54×0.75 or M48×0.75 adapter rings. Both ends of the reducer body are M59×1 threads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBack focus:\u003c\/strong\u003e 55mm from the base of the M48×0.75 male thread. No additional spacing calculation required when using the supplied adapters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFilter compatibility:\u003c\/strong\u003e Built-in rear M48×0.75 thread accepts standard 2\" astronomy filters directly.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e91F only\u003c\/strong\u003e — not compatible with the 111F (which uses a 0.74× reducer with M68 threads) or the 131F (which uses a 0.74× reducer with M72 threads).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — focal reducers are imaging-only accessories and are not used with eyepieces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e55mm back focus must be respected\u003c\/strong\u003e — using additional spacers that alter the back focus from 55mm will degrade corner star quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does this reducer do to the 91F?\u003c\/strong\u003e\u003cbr\u003eIt reduces the focal length from 609mm to 455mm and the focal ratio from f\/6.7 to f\/5, giving a wider field of view and faster exposures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it work on the 111F or 131F?\u003c\/strong\u003e\u003cbr\u003eNo. Each F Series telescope has its own dedicated reducer with different thread sizes. The 111F uses a 0.74× Reducer (M68 thread) and the 131F uses a 0.74× Reducer (M72 thread).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener at f\/5?\u003c\/strong\u003e\u003cbr\u003eNo. Field flattening is built into the reducer and covers the full 44mm image circle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the back focus?\u003c\/strong\u003e\u003cbr\u003e55mm from the base of the M48×0.75 male thread on the rear of the reducer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this suitable for a travel setup?\u003c\/strong\u003e\u003cbr\u003eYes. At 0.3kg it adds minimal weight and the compact size fits easily into any imaging kit bag.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 91F 0.75× Reducer\u003c\/strong\u003e as an ideal companion for the 91F — particularly for imagers who primarily target large nebulae or who shoot from light-polluted sites where a faster focal ratio makes a real practical difference. At f\/5, the 91F system becomes one of the most capable and portable wide-field full-frame imaging setups available at this price point. For 91F owners who haven’t yet added a reducer, this is the single most impactful accessory purchase you can make for the telescope.\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154399125615,"sku":"91F-REDUCER-075X","price":278.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/697d8e02-5798-4712-9d20-77ec86f1ed18.png?v=1779667568"},{"product_id":"askar-60f-flat-field-quadruplet-astrograph","title":"Askar 60F Flat-Field Quadruplet Astrograph","description":"\u003ch2\u003eAskar 60F Flat-Field Quadruplet Astrograph — 60mm f\/6.8\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar 60F Flat-Field\u003c\/strong\u003e is the most compact and portable telescope in the Askar F Series — a 60mm aperture, 408mm focal length quadruplet APO astrograph that weighs just 2.36kg and measures as little as 289mm in total length with the dew shield retracted. Despite its small footprint, it delivers the same self-flattening full-frame performance that defines the entire F Series: a 44mm image circle covering full-frame sensors, no separate flattener required, and no backfocus calculation needed.\u003c\/p\u003e\n\n\u003cp\u003eThe quadruplet optical design (three front elements, one rear correcting element) includes one piece of ED glass to control chromatic aberration. A 2.4\" rack-and-pinion focuser with 1:10 fine adjustment and a 360° rotator handles the imaging side. The matting-felt-lined tube interior reduces stray light, and the signature Askar blue-and-white CNC finish keeps the aesthetic consistent with the rest of the F Series lineup.\u003c\/p\u003e\n\n\u003cp\u003eThe 60F ships with a photographic extension tube featuring a built-in 2\" filter thread and M48×0.75 and M54×0.75 adapters, a 230mm Vixen-style dovetail plate with 1\/4\" and 3\/8\" tripod screw holes (for direct tripod mounting without any mount), tube rings, and a handle. Two finder base positions on the focuser body plus the handle slot provide three guide scope or accessory mounting positions.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravel and portable rig astrophotographers\u003c\/strong\u003e who need a full-featured, full-frame-capable astrograph in the smallest and lightest possible package.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeginner to intermediate astrophotographers\u003c\/strong\u003e who want to start with a self-flattening instrument and remove the complexity of external flatteners from day one.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhotographers using ultralight mounts\u003c\/strong\u003e such as the ZWO AM5, iOptron HEM27, Sky-Watcher Star Adventurer GTi, or any mount where weight is a critical constraint.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose users\u003c\/strong\u003e wanting a compact refractor for wide-field visual observing with standard 1.25\" and 2\" eyepieces, as well as astrophotography.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAstrophotographers on a budget\u003c\/strong\u003e who want the F Series self-flattening design at the most accessible price point in the lineup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar 60F?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmallest F Series astrograph\u003c\/strong\u003e — 289mm body length with dew shield retracted and 2.36kg OTA weight; the most portable full-frame-capable astrograph in the Askar lineup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-flattening quadruplet\u003c\/strong\u003e — no separate flattener needed, no backfocus calculation. Attach and shoot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e44mm full-frame image circle\u003c\/strong\u003e — covers all modern full-frame DSLR, mirrorless, and dedicated astronomy camera sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eED glass chromatic control\u003c\/strong\u003e — one ED element in the quadruplet group suppresses false colour across the full image field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in 360° rotator\u003c\/strong\u003e — frame targets at any angle without repositioning the mount.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.4\" R\u0026amp;P focuser with 1:10 fine adjustment\u003c\/strong\u003e — rigid, low-flex focuser with anti-slip fine adjustment cover.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect tripod mounting\u003c\/strong\u003e — the 230mm Vixen dovetail includes 1\/4\" and 3\/8\" screw holes so the 60F can be used on a camera tripod with no equatorial mount.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMatting felt tube interior\u003c\/strong\u003e — stray light absorption lining for better contrast.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRetractable dew shield\u003c\/strong\u003e — compact for transport; extends for field use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTravel and portable astrophotography on ultralight mounts\u003c\/li\u003e\n  \u003cli\u003eWide-field deep-sky imaging (large nebulae, star clusters, Milky Way fields)\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR, mirrorless, and dedicated astronomy camera imaging\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging\u003c\/li\u003e\n  \u003cli\u003eWide-field visual observing with 1.25\" and 2\" eyepieces\u003c\/li\u003e\n  \u003cli\u003eBeginner and entry-level astrophotography\u003c\/li\u003e\n  \u003cli\u003eTripod-mounted solar system observing with appropriate solar filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e Ships with M48×0.75 and M54×0.75 photographic adapters. DSLR users need a standard T-ring. Dedicated astronomy cameras with M54 or M48 nose threads connect directly. The built-in 2\" filter thread accepts standard astronomy filters. Note: the 60F uses M64×0.75 as the primary rear-end thread (vs M64×1 on the 91F), so verify adapter compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMount compatibility:\u003c\/strong\u003e The 230mm Vixen dovetail fits any Vixen-compatible saddle. The built-in 1\/4\" and 3\/8\" screw holes allow direct tripod use. At 2.86kg gross, compatible with the full range of ultralight mounts — a mount rated for at least 4–6kg payload is recommended for imaging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e The Askar 60F 0.75× Reducer (sold separately) reduces the system to f\/5.1 and 311mm focal length for an even wider field and faster exposures. An electronic focuser motor is available separately for remote focus control.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmaller aperture than other F Series models\u003c\/strong\u003e — 60mm collects significantly less light than the 91F or larger models. Exposures will be longer on faint targets. The optional 0.75× reducer helps offset this.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.4\" focuser (not 3\")\u003c\/strong\u003e — the 60F uses a 2.4\" focuser rather than the 3\" found on the 91F and above. Fully adequate for the optical format, but worth noting for users accustomed to 3\" systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for planetary imaging\u003c\/strong\u003e — the 408mm focal length is optimized for wide-field deep sky, not high-magnification planetary work.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo electronic focuser included\u003c\/strong\u003e — motorized focus requires a separately purchased motor.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo eyepieces included\u003c\/strong\u003e — unlike the 91F, the 60F does not ship with eyepieces. A 1.25\" or 2\" eyepiece is required for visual use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The self-flattening quadruplet produces a flat field across the 44mm image circle natively.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it cover full-frame sensors?\u003c\/strong\u003e\u003cbr\u003eYes. The 44mm image circle covers all modern full-frame DSLR, mirrorless, and dedicated astronomy sensors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs it good for beginners?\u003c\/strong\u003e\u003cbr\u003eYes — the low weight, simple setup, and self-flattening design make it one of the most beginner-friendly astrographs available. It can also be used on a camera tripod for simple visual observing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the lightest mount that can carry it for imaging?\u003c\/strong\u003e\u003cbr\u003eAt 2.86kg gross, even the lightest equatorial tracking mounts — including the Sky-Watcher Star Adventurer GTi, ZWO AM5, iOptron SkyGuider Pro — can carry it for astrophotography.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs a reducer available?\u003c\/strong\u003e\u003cbr\u003eYes. The Askar 60F 0.75× Reducer (sold separately) reduces the system to f\/5.1 and 311mm focal length.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does it compare to the 91F?\u003c\/strong\u003e\u003cbr\u003eThe 60F is lighter (2.36kg vs 3.92kg), shorter (289mm vs 513mm body), and less expensive. The 91F has more aperture (91mm vs 60mm), a longer focal length (609mm vs 408mm), and includes eyepieces and an erecting prism in the standard package. Choose the 60F for maximum portability; the 91F for more aperture and a more complete out-of-the-box kit.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar 60F Flat-Field\u003c\/strong\u003e for anyone who prioritizes portability above all else without sacrificing flat-field, full-frame optical quality. It is the ideal grab-and-go astrograph for travel, star parties, and ultralight mount setups — and one of the best entry points into serious astrophotography at a highly accessible price. If you need more aperture and aren’t constrained by weight or mount payload, the 91F or 111F will serve you better. But for true portability with no optical compromises, the 60F is in a class of its own in the F Series.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\n\u003cp\u003eThe following optical and mechanical diagrams are provided for customers who wish to review the Askar 60F’s optical performance, mechanical dimensions, connection specifications, and assembly details.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/4da5ff7b-ecc0-4710-8946-ed19031fbba6.jpg\" alt=\"Askar 60F Product Size Diagram - tube length and mechanical dimensions with dew shield contracted and extended\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/3a4ccbd6-82bd-426b-a686-67e2262fa975.jpg\" alt=\"Askar 60F Connection Diagram - photographic adapter and camera thread connection details\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/a859e8f9-aad8-44ea-97e7-b667b77bb291.jpg\" alt=\"Askar 60F Locking Screw Position Diagram - focuser and adapter lock screw locations\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ba0e401b-24ed-4669-a3e2-00786aa1f7ef.jpg\" alt=\"Askar 60F Electronic Focuser Assembly Diagram - motorized focuser motor mounting instructions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/4e404fdd-a0cd-4dee-94a8-dd323ee7b67b.jpg\" alt=\"Askar 60F Optical Path Diagram - quadruplet lens group and light path layout\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ce20716a-504a-4d0b-8479-0b5157d2bf41.jpg\" alt=\"Askar 60F Spot Diagram - star spot performance across the full-frame 44mm image circle\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154399879279,"sku":"60F-FLAT-FIELD","price":698.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a3dac66d-7f5a-40dd-b940-f107973989cf.png?v=1779667843"},{"product_id":"askar-sqa55-quintuplet-petzval-astrograph-55mm-f-4-8","title":"Askar SQA55 Quintuplet Petzval Astrograph 55mm f\/4.8","description":"\u003ch2\u003eAskar SQA55 Quintuplet Petzval Astrograph — 55mm f\/4.8\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA55\u003c\/strong\u003e is a 55mm aperture, 264mm focal length, f\/4.8 quintuplet air-spaced Petzval astrograph designed for astrophotographers who demand sharp, flat full-frame star fields with the speed and portability to image anywhere. The optical design incorporates one piece of SD glass and one piece of ED glass to suppress chromatic aberration across the entire 44mm image circle, producing clean round stars from centre to corner on full-frame and APS-C sensors.\u003c\/p\u003e\n\n\u003cp\u003eAs a Petzval-design telescope, the SQA55 does not require a separate flattener — the five-element optical group delivers a flat field natively. A manual focus ring with an adjustable dew shield allows precise focus control in the field, and the 14-blade aperture diaphragm provides smooth out-of-focus backgrounds when the aperture is stopped down for daytime or landscape photography.\u003c\/p\u003e\n\n\u003cp\u003eThe SQA55 ships with a military-grade waterproof carrying case — one of the only astrographs in this aperture class to do so — making it a genuinely travel-ready system for remote dark-sky sites, star parties, and expeditions.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTravel and portable-mount astrophotographers\u003c\/strong\u003e who need a full-frame-capable astrograph in the smallest, lightest, most rugged package available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntermediate to advanced astrophotographers\u003c\/strong\u003e who want a fast, high-quality Petzval design without adding a flattener to their imaging train.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide-field deep-sky imagers\u003c\/strong\u003e targeting large nebulae, star clusters, and Milky Way fields that benefit from 264mm focal length and f\/4.8 speed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-use photographers\u003c\/strong\u003e who also want a high-quality telephoto lens for landscape and daytime photography.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImagers in light-polluted skies\u003c\/strong\u003e where the f\/4.8 speed dramatically shortens required exposure times.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar SQA55?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuintuplet Petzval with SD + ED glass\u003c\/strong\u003e — flat-field, colour-corrected performance across the full 44mm image circle at f\/4.8 with no external flattener required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast f\/4.8 focal ratio\u003c\/strong\u003e — collects light significantly faster than f\/6 or f\/7 instruments, cutting exposure times for faint nebulae and galaxies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMilitary-grade waterproof case included\u003c\/strong\u003e — the only astrograph in this class that ships with expedition-grade protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e14-blade aperture iris\u003c\/strong\u003e — adjustable from f\/4.8 to f\/22 for daytime photography with smooth, rounded bokeh.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose design\u003c\/strong\u003e — usable as a high-quality telephoto lens for landscape, wildlife, and event photography.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-frame 44mm image circle\u003c\/strong\u003e — covers all modern full-frame DSLR, mirrorless, and dedicated astronomy cameras.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact and lightweight at 1.84kg OTA\u003c\/strong\u003e — compatible with ultralight tracking mounts for travel imaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuick-release accessory system\u003c\/strong\u003e — four quick-release bases on the tube body accept the optional quick-release handle bar and accessories tool-free.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky astrophotography (nebulae, star clusters, Milky Way)\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging from light-polluted sites\u003c\/li\u003e\n  \u003cli\u003eTravel and remote dark-sky imaging on ultralight mounts\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR, mirrorless, and dedicated astronomy camera imaging\u003c\/li\u003e\n  \u003cli\u003eLandscape and telephoto photography (daytime use with aperture iris)\u003c\/li\u003e\n  \u003cli\u003ePortable guided and unguided wide-field imaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCamera connection:\u003c\/strong\u003e M48×0.75 rear thread with built-in M48×0.75 2\" filter thread. Compatible with standard T-rings and M48 camera adapters. The recommended back focus connection distance is 55mm (range: 50–60mm). DSLR and mirrorless cameras connect via a T-ring; dedicated astronomy cameras with M48 nosepieces connect directly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter compatibility:\u003c\/strong\u003e M67 front thread (67mm screw-in filters); M48×0.75 rear thread accepts 2\" astronomy filters directly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e SQA55 Quick-Release Handle Bar, SQA55 AF Kit (electronic focuser adapter, sold separately).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot compatible\u003c\/strong\u003e with the SQA Series Handle Bar or SQA Series Heightening Section — those accessories require a different mounting interface and are designed for the SQA70 and larger models.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual focus only\u003c\/strong\u003e — the SQA55 does not have a motorized focuser. An electronic focuser requires the optional SQA55 AF Kit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — the SQA55 has no eyepiece holder or visual adapter. It is a dedicated photographic instrument.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e55mm back focus must be respected\u003c\/strong\u003e — the specified 50–60mm back focus range is critical for field flatness. Spacers outside this range will degrade corner star quality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClosest focus distance 5m\u003c\/strong\u003e — the SQA55 cannot focus on subjects closer than 5 metres, limiting its terrestrial photography applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo dovetail plate included\u003c\/strong\u003e — the SQA55 ships with the OTA, handle, and carrying case only. A dovetail plate or tube rings are required for mounting on a standard saddle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The quintuplet Petzval design provides a flat field natively across the full 44mm image circle at f\/4.8.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it for visual observing?\u003c\/strong\u003e\u003cbr\u003eNo. The SQA55 is a dedicated imaging instrument with no eyepiece holder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the back focus?\u003c\/strong\u003e\u003cbr\u003e55mm recommended, with a usable range of 50–60mm from the base of the M48×0.75 male thread.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a motorized focuser available?\u003c\/strong\u003e\u003cbr\u003eYes — the optional SQA55 AF Kit adapts virtually any brand of electronic focuser motor to the SQA55's focus ring, sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work as a camera lens?\u003c\/strong\u003e\u003cbr\u003eYes, with the aperture iris set between f\/4.8 and f\/22. The closest focus distance is 5m, so it is best suited for landscape, astroscape, and distant subjects rather than close-up photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eAt 2.18kg gross, any equatorial tracking mount with at least a 4–6kg payload rating works well for imaging, including ultralight mounts like the ZWO AM5, iOptron HEM27, or Sky-Watcher Star Adventurer GTi.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar SQA55\u003c\/strong\u003e for any astrophotographer who values portability without optical compromise. The f\/4.8 speed, flat-field Petzval design, and military-grade carrying case make it one of the most capable travel astrographs available at any price point. If you regularly image from remote locations, dark-sky parks, or travel internationally for astrophotography, the SQA55 delivers professional-grade results from a system that fits in carry-on luggage. For larger aperture or longer focal length, consider the SQA70 or SQA85.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following diagrams are provided for customers who wish to review the mechanical dimensions, camera connection specifications, and electronic focuser assembly details for the Askar SQA55.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ad04c525-150e-432d-9d40-029448807e34.jpg?vf=B7gH3s\" alt=\"Askar SQA55 Product Size Diagram - tube and dew shield dimensions\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/1e3ab7f8-e65b-4607-83e8-a7797fbe3809.jpg?vf=B7gH3s\" alt=\"Askar SQA55 Connection Diagram - M48 rear adapter and camera connection details\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/6e54949f-2222-49c1-97bf-44f8e520df8a.jpg?vf=B7gH3s\" alt=\"Askar SQA55 AF Kit Assembly Diagram - electronic focuser motor installation on SQA55 focus ring\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154403614831,"sku":"SQA55-PETZVAL","price":1113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/855d05fd-bdbb-47f2-ab27-4f90b22a2dd3.png?v=1779668681"},{"product_id":"askar-sqa70-quintuplet-petzval-astrograph-70mm-f-4-8","title":"Askar SQA70 Quintuplet Petzval Astrograph 70mm f\/4.8","description":"\u003ch2\u003eAskar SQA70 Quintuplet Petzval Astrograph — 70mm f\/4.8\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA70\u003c\/strong\u003e is a 70mm aperture, 336mm focal length, f\/4.8 quintuplet air-spaced Petzval astrograph delivering sharp, flat full-frame star fields across the 44mm image circle. Two pieces of ED glass in the quintuplet optical group control chromatic aberration across the full field, and the Petzval design eliminates the need for an external flattener. With 27% more aperture than the SQA55 and a 336mm focal length that suits both wide-field nebulae and moderately framed galaxies, the SQA70 sits at a versatile middle position in the SQA Series lineup.\u003c\/p\u003e\n\n\u003cp\u003eThe rear adapter accepts M42, M48 (with built-in 2\" filter thread), and M54 connections — giving the SQA70 the widest camera compatibility in the SQA Series. The dew shield retracts for transport, and the OTA ships with an Oxford cloth case. The optional SQA Series Handle Bar and Heightening Section are both compatible with the SQA70.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntermediate to advanced astrophotographers\u003c\/strong\u003e upgrading from smaller astrographs who want more aperture and slightly longer reach than the SQA55.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-frame imagers\u003c\/strong\u003e who want a versatile focal length that works for both large emission nebulae and framing individual galaxies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAstrophotographers on mid-payload mounts\u003c\/strong\u003e — at 3.5kg gross, the SQA70 works well on mounts rated for 6–10kg payload.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose users\u003c\/strong\u003e wanting a fast Petzval for deep-sky imaging that can also serve as a telephoto for daytime photography (no aperture iris — fixed f\/4.8).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar SQA70?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuintuplet Petzval with 2× ED glass\u003c\/strong\u003e — flat-field, well-corrected across the full 44mm image circle at f\/4.8 with no flattener needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast f\/4.8\u003c\/strong\u003e — short exposure times for faint nebulae, ideal for narrowband imaging from light-polluted skies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidest camera compatibility in the SQA Series\u003c\/strong\u003e — M42, M48, and M54 rear adapters included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile focal length at 336mm\u003c\/strong\u003e — well-suited to large nebulae, galaxy groups, and Milky Way star fields.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad back-focus range (37–68mm)\u003c\/strong\u003e — accommodates OAGs, filter drawers, and other accessories in the imaging train.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional Handle Bar and Heightening Section compatible\u003c\/strong\u003e — easy to add carry handle and OTA clearance accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWide-field and mid-focal-length deep-sky astrophotography\u003c\/li\u003e\n  \u003cli\u003eLarge emission and reflection nebulae, galaxy groups, star clusters\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband filter imaging\u003c\/li\u003e\n  \u003cli\u003eFull-frame DSLR, mirrorless, and dedicated astronomy camera imaging\u003c\/li\u003e\n  \u003cli\u003eGuided and unguided portable setups on mid-payload mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e M42, M48 (with built-in M48×0.75 2\" filter thread), and M54 adapters included. Recommended back focus 55mm; usable range 37–68mm from the rear adapter base.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e SQA Series Handle Bar, SQA Series Heightening Section (both compatible). An electronic focuser motor can be fitted; contact us for the correct adapter for your focuser brand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMount requirements:\u003c\/strong\u003e At 3.5kg gross, a mount with at least 6–8kg payload is recommended for stable imaging.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo aperture iris\u003c\/strong\u003e — the SQA70 is fixed at f\/4.8. It cannot be stopped down for daytime photography the way the SQA55 can.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — no eyepiece holder or visual adapter is included or available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronic focuser not included\u003c\/strong\u003e — manual focus only; a separate motor adapter is required for automated focusing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot compatible\u003c\/strong\u003e with the SQA55 Quick-Release Handle Bar or SQA55 AF Kit — those are SQA55-specific accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The Petzval quintuplet design provides a flat field natively across 44mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the SQA70 compare to the SQA55?\u003c\/strong\u003e\u003cbr\u003eThe SQA70 has more aperture (70mm vs 55mm), a longer focal length (336mm vs 264mm), and wider camera compatibility (M42\/M48\/M54 vs M48 only). The SQA55 has an aperture iris for daytime use and ships with a military waterproof case. The SQA70 is better for imaging; the SQA55 is more portable and travel-rugged.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the back focus?\u003c\/strong\u003e\u003cbr\u003e55mm recommended; 37–68mm usable range from the rear adapter base.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar SQA70\u003c\/strong\u003e for astrophotographers who want more aperture and focal length than the SQA55 while keeping the system compact and versatile. Its broad camera compatibility, wide back-focus range, and fast f\/4.8 Petzval optics make it an excellent choice for a dedicated imaging refractor on a mid-sized mount.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following diagrams cover the mechanical dimensions, camera connection specifications, locking screw positions, and electronic focuser assembly for the Askar SQA70.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/8d292646-f919-4112-bd3f-5dd0f2bf88b5.jpg?vf=B7gH3s\" alt=\"Askar SQA70 Product Size Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/3409f52b-4f6b-46f1-8352-b582287a7052.jpg?vf=B7gH3s\" alt=\"Askar SQA70 Connection Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c5de3e75-9421-4e89-84e0-f05312ce3cb8.jpg?vf=B7gH3s\" alt=\"Askar SQA70 Locking Screw Position Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ecf1a960-561a-4e5e-803a-f96bbd192fc5.jpg?vf=B7gH3s\" alt=\"Askar SQA70 Electronic Focuser Assembly Diagram part 1\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/0e0ab408-fc4e-4bd9-b6fc-98ee34b536a9.jpg?vf=B7gH3s\" alt=\"Askar SQA70 Electronic Focuser Assembly Diagram part 2\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154403909743,"sku":"SQA70-PETZVAL","price":2233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/cc4f41c4-88c5-4e56-9324-f33223f7d5b0.jpg?v=1779668767"},{"product_id":"askar-sqa85-quintuplet-petzval-astrograph-85mm-f-4-8","title":"Askar SQA85 Quintuplet Petzval Astrograph 85mm f\/4.8","description":"\u003ch2\u003eAskar SQA85 Quintuplet Petzval Astrograph — 85mm f\/4.8\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA85\u003c\/strong\u003e is an 85mm aperture, 408mm focal length, f\/4.8 quintuplet air-spaced Petzval astrograph incorporating two pieces of SD glass for high-grade chromatic aberration correction across its full-frame image circle. As the mid-range model in the SQA Series, the SQA85 steps up from the SQA70 with a significantly larger 85mm aperture and 408mm focal length — the same focal length as the Askar 60F, but delivered at f\/4.8 vs f\/6.8, meaning dramatically faster light collection and shorter required exposures.\u003c\/p\u003e\n\n\u003cp\u003eThe Petzval optical design provides a flat field natively, eliminating the need for a separate field flattener. Rear adapter options include M48, M54, and M68, making the SQA85 compatible with medium-format astrocameras. The optional SQA Series Handle Bar and Heightening Section are compatible, and the OTA ships in an Oxford cloth carry case.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced astrophotographers\u003c\/strong\u003e seeking a large-aperture, flat-field imaging refractor at a fast focal ratio.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-frame and medium-format imagers\u003c\/strong\u003e who want a Petzval astrograph with M68 connection compatibility for larger sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers targeting faint nebulae and galaxies\u003c\/strong\u003e who benefit from the 85mm aperture and f\/4.8 speed to shorten total integration time significantly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAstrophotographers on medium-to-large payload mounts\u003c\/strong\u003e — at 4.62kg gross, a mount rated for at least 8–10kg is recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar SQA85?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo pieces of SD glass\u003c\/strong\u003e — superior chromatic aberration correction compared to standard ED glass designs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast f\/4.8 with 85mm aperture\u003c\/strong\u003e — significantly more light-gathering than smaller aperture or slower focal ratio alternatives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eM48, M54, and M68 rear adapters\u003c\/strong\u003e — compatible with medium-format astrocameras and the widest range of dedicated astronomy cameras.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo external flattener required\u003c\/strong\u003e — flat-field Petzval design covers the full 44mm image circle natively.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad back-focus range (40–70mm)\u003c\/strong\u003e — accommodates filters, OAGs, and accessory adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced deep-sky astrophotography (faint nebulae, galaxy fields, star-forming regions)\u003c\/li\u003e\n  \u003cli\u003eNarrowband imaging (Hα, OIII, SII) from suburban and light-polluted sites\u003c\/li\u003e\n  \u003cli\u003eFull-frame and medium-format camera imaging\u003c\/li\u003e\n  \u003cli\u003eLong-integration imaging sessions on medium-to-large equatorial mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e M48, M54, and M68 adapters included. Built-in M48×0.75 2\" filter thread. Recommended back focus 55mm; usable range 40–70mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e SQA Series Handle Bar, SQA Series Heightening Section (both compatible). Electronic focuser motor fitting is possible with appropriate adapter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMount requirements:\u003c\/strong\u003e Minimum 8–10kg payload recommended for stable imaging with the SQA85.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — no eyepiece holder or visual adapter is available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronic focuser not included\u003c\/strong\u003e — manual focus only without a separately purchased motor adapter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRequires a capable mount\u003c\/strong\u003e — at 4.62kg gross, lightweight tracking mounts are not suitable for stable long-exposure imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the SQA85 compare to the SQA70?\u003c\/strong\u003e\u003cbr\u003eThe SQA85 has 85mm vs 70mm aperture, 408mm vs 336mm focal length, SD glass vs ED glass, and M68 compatibility for larger sensors. It collects more light per unit time but requires a heavier mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a flattener?\u003c\/strong\u003e\u003cbr\u003eNo. The Petzval quintuplet design provides a flat field natively.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sensors does it cover?\u003c\/strong\u003e\u003cbr\u003eThe 44mm image circle covers all full-frame sensors. M68 adapters allow connection to medium-format astrocameras up to 55mm diagonal.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eAt Ontario Telescope and Accessories, the \u003cstrong\u003eAskar SQA85\u003c\/strong\u003e is our recommendation for advanced astrophotographers ready to step up to a larger-aperture, faster Petzval system. The two pieces of SD glass, M68 adapter compatibility, and f\/4.8 speed make it an excellent choice for serious narrowband and broadband imaging on a mid-to-large equatorial mount.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/94dac034-2489-4eea-b0a7-1eb07dbebac1.jpg?vf=B7gH3s\" alt=\"Askar SQA85 Product Size Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/3ebdb692-2464-4f34-a8ea-5e2fe2b05a40.jpg?vf=B7gH3s\" alt=\"Askar SQA85 Connection Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/65b887ac-8ae3-4bbb-82e8-582719bd009d.jpg?vf=B7gH3s\" alt=\"Askar SQA85 Locking Screw Position Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/41845f58-0a1b-4c7e-a55a-304511b3d947.jpg?vf=B7gH3s\" alt=\"Askar SQA85 Electronic Focuser Assembly Diagram part 1\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/e6f74d23-8648-4887-aae9-f6a0767a384d.jpg?vf=B7gH3s\" alt=\"Askar SQA85 Electronic Focuser Assembly Diagram part 2\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154404073583,"sku":"SQA85-PETZVAL","price":3353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/77765394-ec4f-4c6a-88e7-8849461b2e13.png?v=1779668845"},{"product_id":"askar-sqa106-quintuplet-petzval-astrograph-106mm-f-4-8","title":"Askar SQA106 Quintuplet Petzval Astrograph 106mm f\/4.8","description":"\u003ch2\u003eAskar SQA106 Quintuplet Petzval Astrograph — 106mm f\/4.8\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA106\u003c\/strong\u003e is a 106mm aperture, 509mm focal length, f\/4.8 quintuplet air-spaced Petzval astrograph with two pieces of SD glass. As the larger of the two medium-format-capable SQA models, the SQA106 delivers a 55mm image circle that covers medium-format astrocameras such as the QHY600 and ZWO ASI6200, as well as all full-frame sensors. Its 509mm focal length at f\/4.8 is well-suited to framing individual galaxies, compact nebulae, and star-forming regions that benefit from moderate magnification with fast light collection.\u003c\/p\u003e\n\n\u003cp\u003eRear adapter options include M48, M54, and M68. The optional SQA Series Handle Bar and Heightening Section are both compatible. The OTA ships with an Oxford cloth case.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced astrophotographers\u003c\/strong\u003e with medium-to-large equatorial mounts seeking the highest-aperture fast Petzval refractor in the SQA Series below the SQA130.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedium-format imagers\u003c\/strong\u003e using cameras with sensors up to 55mm diagonal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep-sky imagers targeting compact or moderately sized objects\u003c\/strong\u003e where a 509mm focal length provides more framing detail than wider systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSerious imagers\u003c\/strong\u003e who need M68 compatibility for maximum sensor coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Askar SQA106?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e106mm aperture at f\/4.8\u003c\/strong\u003e — the largest aperture fast Petzval astrograph in the SQA Series before the flagship SQA130.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedium-format 55mm image circle\u003c\/strong\u003e — covers APS-C, full-frame (44mm), and medium-format sensors up to 55mm diagonal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo pieces of SD glass\u003c\/strong\u003e — premium chromatic correction for clean star colour across the entire field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e509mm focal length\u003c\/strong\u003e — versatile for galaxy clusters, compact nebulae, and detailed wide-field imaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad back-focus range (48–78mm)\u003c\/strong\u003e — accommodates OAGs, filter drawers, and spacers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced deep-sky astrophotography (galaxies, planetary nebulae, star clusters)\u003c\/li\u003e\n  \u003cli\u003eNarrowband and broadband imaging on large equatorial mounts\u003c\/li\u003e\n  \u003cli\u003eMedium-format astrocamera imaging\u003c\/li\u003e\n  \u003cli\u003eLong-integration sessions requiring maximum aperture efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCamera connections:\u003c\/strong\u003e M48, M54, and M68 adapters included. Recommended back focus 55mm; usable range 48–78mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e SQA Series Handle Bar, SQA Series Heightening Section.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMount requirements:\u003c\/strong\u003e At 8.12kg gross, a mount rated for at least 12–15kg payload is recommended.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavier system\u003c\/strong\u003e — at 8.12kg gross, requires a substantial equatorial mount. Not suitable for lightweight tracking mounts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot for visual observing\u003c\/strong\u003e — no eyepiece holder or visual adapter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronic focuser not included\u003c\/strong\u003e — requires a separately purchased motor adapter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the SQA106 differ from the SQA85?\u003c\/strong\u003e\u003cbr\u003eThe SQA106 has 106mm vs 85mm aperture, 509mm vs 408mm focal length, and a larger 55mm image circle vs 44mm. It covers medium-format sensors and provides more detail on compact objects but requires a heavier mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sensors does it cover?\u003c\/strong\u003e\u003cbr\u003eUp to 55mm diagonal — covers APS-C, full-frame (44mm), and medium-format cameras such as the QHY600M, ZWO ASI6200, and similar.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eAt Ontario Telescope and Accessories, we recommend the \u003cstrong\u003eAskar SQA106\u003c\/strong\u003e for advanced astrophotographers on capable mounts who want to step up to a larger aperture, longer focal length Petzval system with medium-format coverage. If your mount can handle the weight, the SQA106 delivers the best combination of speed, aperture, and sensor coverage in the SQA Series before the flagship SQA130.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/781d6501-472e-47d0-a857-87ac0595cb7e.jpg?vf=B7gH3s\" alt=\"Askar SQA106 Product Size Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/6054cd08-1ef2-4216-ab11-03c3e751632c.jpg?vf=B7gH3s\" alt=\"Askar SQA106 Connection Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/a07f750f-28e5-40f9-b02a-a58bb523ae21.jpg?vf=B7gH3s\" alt=\"Askar SQA106 Locking Screw Position Diagram\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/c1beb3c6-1947-4f0f-9922-265ec2103f99.jpg?vf=B7gH3s\" alt=\"Askar SQA106 Electronic Focuser Assembly Diagram part 1\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image1.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/60137c2e-6cfe-441e-9a53-547241935d8c.jpg?vf=B7gH3s\" alt=\"Askar SQA106 Electronic Focuser Assembly Diagram part 2\" style=\"max-width:100%;display:block;margin:1em 0;\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53154404171887,"sku":"SQA106-PETZVAL","price":4753.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/da1939c1-188a-4d4b-9147-ace5a3276b88.png?v=1779668921"}],"url":"https:\/\/ontariotelescope.com\/collections\/askar-telescopes.oembed?page=3","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}