{"title":"Visual \u0026 Planetary Filters","description":"\u003cp\u003eVisual \u0026amp; Planetary Filters from every brand we carry. Part of \u003ca href=\"\/collections\/filters\"\u003eFilters\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"antares-1-25-variable-transmission-filter-1-40","title":"Antares 1.25\" Variable Transmission Filter (1-40%)","description":"\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eWhen observing the Moon or planets, a lot of the time there is just too much light!Neutral density (ND) polarizing filters to cut the brightness down to size. These can of course be stacked for even greater reduction. Available for both 1.25\" and 2\" barrels. \u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e FXP variable polarizing filter will allow transmission of roughly 1% to 40% by rotation of the two elements.\u003c\/span\u003e\u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44012381306991,"sku":"FXP","price":42.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/antaresvariablepolarizer125in600x480__50591.png?v=1766547849"},{"product_id":"antares-fs2-1-25-filter-set-4-colours","title":"Antares FS2 1.25\" Filter set 4 Colours","description":"\u003cspan style=\"font-family: Arial;\"\u003eAntares 1.25\" colour filters set of 4\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;\"\u003eIncludes #11 Yellow-Green, #21 Orange, #80A Light Blue, #ND25 Neutral Density filter 25%\u003c\/span\u003e\u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44012381536367,"sku":"FS2","price":53.46,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/antaresfs2filterset600x480__71712.png?v=1766547877"},{"product_id":"neutral-density-0-9-2-filter","title":"Explore Scientific 2-inch ND 0.9 Neutral Density Moon Filter with 13 Percent Transmission","description":"\u003cspan style=\"font-family: 'Source Sans Pro', sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);\"\u003eThe neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4\"(10.2cm) and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness.\u003c\/span\u003e\u003cbr style=\"font-family: 'Source Sans Pro', sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr style=\"font-family: 'Source Sans Pro', sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: 'Source Sans Pro', sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);\"\u003eColor Filter #ND96 Moon Filter (0.9 density; 13% transmission)\u003c\/span\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44013259292783,"sku":"310240","price":73.67,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2moon_2_1__31188.jpg?v=1766550385"},{"product_id":"starfield-5-x-2-filters-version-2","title":"Starfield 5 x 2\" Filters Version 2","description":"\u003cp\u003e\u003cspan\u003eUltra slim motorized filter wheel - \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eonly 0.7\" thick\u003c\/strong\u003e\u003cspan\u003e! USB controlled (ASCOM driver)and powered (\u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eno additional power supply required\u003c\/strong\u003e\u003cspan\u003e). No motors protruding from the filter wheel to get in the way. Measuring only 7.6\" x 8\" x 0.7\", this is one of the smallest, thinnest motorized filter wheels on the market. Only adds 19mm of back focus to the optical path when used with our adapters. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cspan\u003ePerfect solution for \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eBasler Ace\u003c\/strong\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e ZWO ASI\u003c\/strong\u003e\u003cspan\u003e, QHY, \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eATIK\u003c\/strong\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e Moravian.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eSBIG cameras\u003c\/strong\u003e\u003cspan\u003e. , and more.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cimg src=\"https:\/\/www.xagylastro.com\/images\/Filter-Wheels-ATIK-ZWOASI-SBIG-MORAVIAN-5x2.jpg\" alt=\"5 x 2\" filter=\"\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003cdiv\u003e\n\u003cstrong style=\"box-sizing: border-box;\"\u003eIncludes:\u003c\/strong\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003eT thread male and female adapters\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003e 2\" barrel adapter\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003e 3M USB interface cable\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOptional Accessories:\u003c\/strong\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003e– M48 thread male and female adapters\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003e– C thread adapter\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan\u003eThe filter carousel is threaded for 5 standard \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eM48 x 0.75 filters\u003c\/strong\u003e\u003cspan\u003e. The maximum filter cell height which can be accommodated is 10mm, having thread length of no more than 6mm.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eRead more about this \u003ca href=\"https:\/\/astrobackyard.com\/filter-wheel\/\" title=\"filter wheen\"\u003etelescope filter wheel\u003c\/a\u003e on AstroBackyard.\u003c\/span\u003e\u003c\/div\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44013343178863,"sku":"FW5200V2","price":505.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Filter-Wheels-ATIK-ZWOASI-SBIG-MORAVIAN-5x2__25826.jpg?v=1766550880"},{"product_id":"xagyl-8-x-1-25-filters-version-2","title":"Xagyl 8 x 1.25\" Filters Version 2","description":"\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eUltra slim motorized filter wheel - \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eonly 0.7\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e\" thick! Holds \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e8 x 1.25\"\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e filters and threaded for \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eM28.5 x 0.6.\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eUSB controlled and powered (\u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eno additional power supply required\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e). No motors protruding from the filter wheel to get in the way. Measuring only 7.6\" x 8\" x 0.7\", this is one of the smallest, \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003ethinnest motorized filter wheels on the market\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e. Only adds 19mm of back focus to the optical path when used with our adapters. Perfect solution for \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eZWO ASI\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb bold font-size:=\"\" line-height:=\"\" background-color:=\"\" font-weight:=\"\"\u003e, QHY, \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eATIK\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e,\u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e Moravian \u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eand \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003eSBIG cameras\u003c\/strong\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" line-height:=\"\" background-color:=\"\"\u003e. \u003c\/span\u003e\u003cdiv\u003e\n\u003cspan style=\"line-height: 22.4px; font-family: \" droid serif arial helvetica sans-serif\u003e\u003cbr\u003e\u003c\/span\u003e\u003cdiv\u003e\n\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);\"\u003eUltra slim motorized filter wheel - only 0.7\" thick!\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eHolds 8 1.25\" filters and threaded for M28.5 x 0.6\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eUSB controlled and powered - no additional power supply required\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eNo motors protruding from the filter wheel to get in the way.\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eMeasuring only 7.6\" x 8\" x 0.7\", this is one of the smallest, thinnest motorized filter wheels on the market.\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eOnly adds 19mm of back focus to the optical path when used with our adapters.\u003c\/span\u003e\u003cbr style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cp style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eIncludes:\u003c\/p\u003e\n\u003cul style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003e\u003cli\u003e10' USB interface cable\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eThe filter carousel is threaded for standard M28.5 x 0.6 filters. The maximum filter cell height which can be accommodated is 10mm, having thread length of no more than 6mm.\u003c\/p\u003e\n\u003cp style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eAll downloads are now available in the \u003cstrong\u003eDOWNLOAD\u003c\/strong\u003e section of the Starfield \u003ca href=\"http:\/\/https:\/\/starfieldoptics.com\/fw-manuals-and-drivers\"\u003eXAGYL Astro website\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: \" droid serif arial helvetica sans-serif font-size: line-height: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(102, 102, 102); font-family: \" droid serif arial helvetica sans-serif font-size: line-height: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44013343244399,"sku":"FW8125V2","price":549.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Filter-Wheels-ASCOM-ATIK-ZWOASI-SBIG-MORAVIAN-8x125__50163.jpg?v=1766550885"},{"product_id":"2-dark-filter","title":"2\" Dark Filter","description":"\u003cspan style=\"color: rgb(88, 89, 91); font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eUse this completely opaque filter when generating dark frame if your camera is not equipped with a built in mechanical shutter.\u003c\/span\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44013343277167,"sku":"DF200","price":34.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Dark_2525202__82600.1682634940.1280.1280.jpg?v=1766550890"},{"product_id":"1-25-dark-filter","title":"1.25\" Dark Filter","description":"\u003cspan style=\"color: rgb(88, 89, 91); font-family: verdana, arial, helvetica, sans-serif; font-size: 11px; background-color: rgb(255, 255, 255);\"\u003eUse this completely opaque filter when generating dark frame if your camera is not equipped with a built in mechanical shutter.\u003c\/span\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44013343309935,"sku":"DF125","price":27.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Dark_252520125__55727.1682634940.1280.1280.jpg?v=1766550895"},{"product_id":"xagyl-7-x-36mm-unmounted-filters","title":"Xagyl - 7 x 36mm Unmounted Filters","description":"\u003ch2 style=\"box-sizing: border-box; margin: 0.45em 0px; font-weight: 400; font-family: Oswald, Arial, Helvetica, sans-serif; line-height: 1.5em; padding: 0px; background-color: rgb(255, 255, 255);\"\u003eProduct description\u003c\/h2\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eUltra slim motorized filter wheel - \u003cstrong style=\"box-sizing: border-box;\"\u003eonly 0.7\u003c\/strong\u003e\" thick! Holds \u003cstrong style=\"box-sizing: border-box;\"\u003e7 x 36mm unmounted\u003c\/strong\u003e filters up to 4mm thick using our proprietary \u003cstrong style=\"box-sizing: border-box;\"\u003ezero-stress\u003c\/strong\u003e retainers. USB controlled and powered (\u003cstrong style=\"box-sizing: border-box;\"\u003eno additional power supply required\u003c\/strong\u003e). No motors protruding from the filter wheel to get in the way. Measuring only 7.6\" x 8\" x 0.7\", this is one of the smallest, \u003cstrong style=\"box-sizing: border-box;\"\u003ethinnest motorized filter wheels on the market\u003c\/strong\u003e. Only adds 19mm of back focus to the optical path when used with our adapters. Perfect solution for \u003cstrong style=\"box-sizing: border-box;\"\u003eBasler Ace\u003c\/strong\u003e,\u003cstrong style=\"box-sizing: border-box;\"\u003e ZWO ASI\u003c\/strong\u003e, \u003cspan style=\"font-weight: bold;\"\u003eQHY,\u003c\/span\u003e \u003cstrong style=\"box-sizing: border-box;\"\u003eATIK\u003c\/strong\u003e,\u003cstrong style=\"box-sizing: border-box;\"\u003e Moravian, \u003c\/strong\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eSBIG cameras, and More!\u003c\/strong\u003e\u003cspan style=\"border-style: initial; border-color: initial; border-image: initial; height: auto;\"\u003e\u003cimg src=\"https:\/\/www.xagylastro.com\/images\/fw736v1.jpg\" alt=\"7 x 36mm Motorised Filter Wheel (ASCOM)\" style=\"box-sizing: border-box; border: 0px; max-width: 100%; height: auto;\"\u003e\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eIncludes:\u003c\/strong\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e– T thread male and female adapters\u003cbr style=\"box-sizing: border-box;\"\u003e– 2\" barrel adapter\u003cbr style=\"box-sizing: border-box;\"\u003e– 3M USB interface cable\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOptional Accessories:\u003c\/strong\u003e\u003cbr style=\"box-sizing: border-box;\"\u003e– M48 thread male and female adapters\u003cbr style=\"box-sizing: border-box;\"\u003e– C thread adapter\u003cbr style=\"box-sizing: border-box;\"\u003e\u003cspan style=\"color: rgb(102, 102, 102);\"\u003e\u003cspan style=\"border-style: initial; border-color: initial; border-image: initial; height: auto;\"\u003e\u003cimg src=\"https:\/\/www.xagylastro.com\/images\/8position-125-ASCOM-Filter-Wheel-ATIK-ZWOASI-FLI.jpg\" alt=\"7 x 36mm Motorised Filter Wheel (ASCOM)\" style=\"box-sizing: border-box; border: 0px; max-width: 100%; height: auto;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; font-family: \" droid serif arial helvetica sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe filter carousel is made for standard \u003cstrong style=\"box-sizing: border-box;\"\u003e36mm unmounted\u003c\/strong\u003e filters. The maximum filter glass thickness which can be accommodated is 4mm.\u003c\/p\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44013370540143,"sku":"FW736V1","price":549.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7_252520postion__49227.1682640014.1280.1280.jpg?v=1766551695"},{"product_id":"baader-u-venus-filter-1-25","title":"Baader U-Venus-Filter 1.25","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eBaader U-Filter (Venus and UV) 1¼?\" and 2\"\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eBaader U-Filter with a Transmission peak approx 80% at CWL 350nm , bandwidth 60nm (320-380nm), with complete blocking of the spectral range from 200nm to 1120nm. Dielectric multi-coated coating on optically polished Schott glass UG-11. Enables shooting in the deep UV spectral region; a wavelength range that was previous inaccessible for amateur astronomers. The Solar Calcium K-Line also is within the passband of this filter.\u003c\/p\u003e\u003cdiv class=\"important-note\" style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 10px; font-family: \" open sans sans-serif rgb solid background-color:=\"\" border:=\"\" border-radius:=\"\" font-size:=\"\"\u003e\n\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); line-height: 1.4; text-rendering: optimizespeed; text-transform: uppercase;\"\u003eIMPORTANT NOTE:\u003c\/h4\u003e\n\u003cp style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eThe Baader U-Filter was created for imaging Venus with a webcam, CCD and CMOS cameras. Using the filter for visual observations is impossible due to the eye's insensitivity to this spectral range (UV).\u003c\/p\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eRequirements for Successful use of this Filter\u003c\/h3\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eUV sensitive imaging camera such as the SKYRIS 274M with at least a telescope of 5\" diameter. A telescope with 8\" diameter is recommended.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eSingle Shot CCD are not suitable for use with the U-Filter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/logo_dodi_sunspot_01_318ad84b-6926-4fcd-bc89-d9a0503b8a07.jpg?v=1766554304\" height=\"144\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eAnother field of application is the recording of the flare structures of the solar atmosphere - not just the edge of the Sun, but also in the solar centre. The Calcium-K line, where the torch areas are clearly visible, lying in the passband of the filter. \u0026amp; Copy; Dominique Dierick\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/baader-ufilter-neu-c14_2010-07-01_2017-09-49_463abb86-c2c9-42cb-b853-4cddf3b9bb96.jpg?v=1766554307\" height=\"150\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Recording © W. Paech\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/venus_2007_paech_bc39c18c-4663-4e02-af72-5eb0deb7f898.jpg?v=1766554309\" height=\"135\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Recording © W. Paech\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/rietze_venus_321e301c-9d12-48bf-8d5e-a7d0f2e125cf.gif?v=1766554312\" height=\"150\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Sickle – 2\/3 closed, a rare photo © M. Rietze\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePhilosophy, Application and Technique\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe planet Venus is surrounded by a closed cloud cover, which moves at high speed around the planet. Here, different cloud bands, which show a steady change of details form similar to the cloud cover of Jupiter. Unfortunately, these clouds can not be seen in visible light, unlike Jupiter, meaning Venus appears completely structureless. However, by using a camera that is sensitive to inaccessible wavelengths unlike the eye, this cloud structure detail can be seen, in particular using ideal wavelengths in UV range between 320nm and 390nm.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eSince the early days of amateur astronomy, amateurs have been trying to work in this light. The difficulty is procuring a suitable filter to work precisely in this short wavelength region adequately. A sharp short-pass filter with high transmission is virtually impossible to produce. This also applies, surprisingly, to interference filters. While a theoretically ideal UV bandpass can be produced, there is inevitably at least one second passage window in the visible range. This is fatal because this undesirable area cannot be blocked with coloured glass. In such a case you would need again an ideal short-pass filter, which again is not produced in sufficient quality.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eAmateurs have tried with modest success to create a filter for stacking one UV passage without a second passage area. This meant a strongly reduced contrast and modest transmission, which is not ideal. Those who believe you can make do with a less transmission filter are soon disabused. In addition the glass of many telescope optics in the UV have a much lower transmission, which does not help.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe good idea of using an excellent UV-interference filter with a second window in the visible light, and evaluate only the blue channel in the resulting images of the colour camera used of course does not either. The filter on the semiconductor is subject to the same problems mentioned above. Also the blue channel gets light from the other channels added to it. Since the semiconductor is not very UV sensitive, the low leakage of the visual light tends to be shifted to the UV. This double image show significantly the effect of refraction and can make the UV detail inaccessible due to this inefficient rejection of light outside of the 320-390nm spectral range.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eWith the latest dielectric coating technology, it is possible to achieve an ideal UV characteristic with the highest transmission while blocking other transmission windows. This has made it possible for the first time for an amateur astronomer to photographically observe the changing clouds of Venus and to say goodbye to the vacuous white crescent. All Baader filters are finely polished optically (increases image quality). High magnification during eyepiece projection is also possible, without reducing the sharpness of the optics.\u003c\/p\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003chr style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/u_filter_beb2ba57-230c-4d25-a5ba-a87d71eae664.jpg?v=1766554317\" height=\"122\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/div\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eNon-Astronomical Application Areas\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThese filters can be used in the observation, by technical photography, of nature. For instance they are used to determine the health of plants. Automotive experts can examine if a vehicle has been repaired as the repaired surfaces are very clearly seen due to differing reflectance. Many other applications are still in testing.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eLeft Picture:\u003c\/strong\u003e Dr. K. Schmitt is using our UV filters to assess the damage by disease. In this example to make the damage to Primroses clearly visible a normal daylight and a UV image are taken. Using a subtraction algorithm the difference in the image shows the damage much more clearly than in the visual image. The pictures were taken with a Nikon D70, Nikkor 105mm UV.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eRight Picture: \u003c\/strong\u003eI am truly pleased with the new 2\" Baader U filter. I thank you and your team for making it! A TRUE MASTERPIECE ! You can see an Ultraviolet capture using this filter on a Nikon D70 camera. The car is uniformly a metallic grey under normal, visible light. The non-factory paint job shows up only under UV. This is my year round test object. With best regards, Sincerely, Vivek Iyer.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader U Filter is only produced in set sizes relevant for use with astronomical telescopes. However, we do produce a family of adaptor rings to mount any of our 2 inch (50.8mm) filters in front of any camera lens which has a filter thread. It is important to note that not all cameras and lenses are suited to UV photography and this could result in a low signal to noise ratio in the image produced. For best results it is advised to use a specialized camera body responsive to UV light (that does not have typical blocking filters that everyday cameras have) and a suitable UV-transmitting photographic lens which has adequate glass substrates for the transmission of UV light.\u003c\/p\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013472743535,"sku":"FUV-1","price":419.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Baader_252520U_252520filter__03181.1682640252.1280.1280.jpg?v=1766554319"},{"product_id":"baader-fringe-killer-filter-2","title":"Baader Fringe Killer Filter 2\"","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003e2\" Baader Fringe Killer Filter\u003c\/h3\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePlaneoptically polished with Phantom Group Coating\u003c\/h4\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-125_200_6ff8b5d9-20f7-4313-b575-65316817cdfd.jpg?v=1766554397\" alt=\"Baader Fringe Killer\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eBaader Fringe Killer\u003c\/div\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe most delicate details of lunar craters and planetary surfaces are much more visible!\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader Fringe-Killer Filter prevents unwanted colour fringes in both the blue spectral range and in the IR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality! This fine optical precision tool also allows inexpensive refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.\u003c\/p\u003e\u003cdiv class=\"emptyClear\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; font-family: \" open sans sans-serif both rgb clear:=\"\" height:=\"\" font-size:=\"\" color:=\"\" background-color:=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" width=\"150\" height=\"144\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eExample of Sirius with and without the Fringe Killer\u003cbr style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eThe Baader Fringe Killer Overview\u003c\/h4\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eFACTS AND FIGURES\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eForms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eAchieved in the passband the highest transmission rate of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eBuilt-in IR-cut filter for the range 656-1150 nm; perfect for the CCD and Digital Camera-use in deep sky, moon or planets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eThe clearly visible colour correction of the Baader Fringe Killer. \u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eTHE HIGHLIGHTS OF THE BAADER FRINGE KILLER\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eProvides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eCancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eEven weak nuances remain clearly visible in the planet due to the excellent colour balance.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eIn conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eThe combination with the Neodymium Skyglow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003ePlaneoptically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eNo deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eHight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eMakes the performance of a simple f\/8 economy refractor look like a classic f\/15 Fraunhofer achromat. See it to believe it!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013474119791,"sku":"FFK-2","price":167.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FFR__93362.jpg?v=1766554405"},{"product_id":"moon-filter-set-1-25","title":"MOON FILTER SET, 1.25”","description":"\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eOur Moon is the most popular object to observe with a telescope. It’s an obvious target that’s easy to locate and full of exciting geographical features to explore. Moon filters enhance lunar viewing by cutting down on the Moon’s bright glare, improving contrast and making faint details easier to observe. Amateur astronomers refer to Moon filters as “sunglasses for the Moon” because they provide a more comfortable view and reduce eye fatigue.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThis Moon Filter Set contains all the filters you will ever need to observe the Moon during its various phases. The set allows you to choose the best filter to use with different eyepiece and telescope combinations. Use the darkest filter with larger aperture telescopes and lower magnification eyepieces. Use the lighter filters with smaller telescopes and higher magnification eyepieces.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThis kit is essential for those looking to take the next step in exploring their telescope’s full lunar capability, or for seasoned lunar observers who use a variety of telescopes and eyepieces to observe the Moon.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eIn this kit, you will receive:\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; margin: 0px 0px 15px 7px; padding: 0px; list-style: none; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; position: relative; margin-bottom: 5px; padding-left: 15px;\"\u003e\n\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eThree neutral density (ND) filters: ND96-0.9 13% T, ND96-0.6 25% T, and ND96-0.3 50% T —\u003c\/span\u003eThese filters dim the entire visual spectrum from 400-700nm equally. The ND96-0.9 filter transmits 13% of the incoming light, the ND96-0.6 transmits 25% and the ND96-0.3 transmits 50%. They do not impart any color to the Moon, but reduce lunar brightness. With several ND filters to choose from, you can find just the right level of light transmission for the Moon depending on its phase, the aperture of your telescope, and the magnification of your eyepiece. ND filters can also be used reduce the glare from Venus to better see its crescent phases, and to help dim bright daytime views when using a telescope terrestrially.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; position: relative; margin-bottom: 5px; padding-left: 15px;\"\u003e\n\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eA Moon \u0026amp; Sky Glow filter — \u003c\/span\u003eThis filter selectively reduces light transmission at different wavelengths and greatly improves contrast for observing subtle lunar features. This filter imparts a very light purple color to the Moon. For those in light-polluted skies, the Moon \u0026amp; Sky Glow filter provides some contrast enhancement when viewing deep sky objects due to the filter blocking some wavelengths associated with common forms of light pollution, e.g. low-pressure sodium (LPS) street lights. Here is the transmission graph for the Moon \u0026amp; Sky Glow filter:\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Graph_large_cd788026-814c-428e-a213-c2d4e229ed64.jpg?v=1766554897\" alt=\"\" style=\"box-sizing: inherit; border-style: none; max-width: 100%;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; margin: 0px 0px 15px 7px; padding: 0px; list-style: none; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; position: relative; margin-bottom: 5px; padding-left: 15px;\"\u003e\n\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eA durable plastic carrying case — \u003c\/span\u003eThe Moon Filter Set comes with a foam-lined plastic case to store all four filters when they are not in use and protect them during transit.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; position: relative; margin-bottom: 5px; padding-left: 15px;\"\u003e\n\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eMoon map and legend — \u003c\/span\u003eFamiliarize yourself with the Moon, our neighboring world with the help of our handheld Moon map. The Moon map comes complete with a legend highlighting 17 key features to explore including Sea of Tranquility, Tycho, Plato, Copernicus and many more. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eHousing\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eEach filter is housed in an aluminum cell, providing a rigid, durable frame for the filter glass. The filters thread onto Celestron 1.25” eyepieces and most other 1.25” eyepieces with a standard filter thread. The filters have threads on the top and bottom to stack with other filters for even more light filtration options.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bolder;\"\u003eExplore the Moon\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eYour Moon Filter Set also includes a free download of \u003cspan style=\"box-sizing: inherit;\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/blogs\/celestron-in-the-community\/lunar-landscapes-the-photography-of-robert-reeves\" style=\"box-sizing: inherit; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(253, 130, 4); transition: color 0.3s cubic-bezier(0.55, 0.085, 0.68, 0.53) 0s;\"\u003eRobert Reeves’ eBook, Lunar Landscapes\u003c\/a\u003e,\u003c\/span\u003e which goes into fascinating detail about the sizes of craters, how marias are formed, the natural history of the Moon, and more.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013529301103,"sku":"94315","price":83.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/94315_Moon_Filter_Kit_1-25_01_570x3802x__47123.jpg?v=1766554899"},{"product_id":"baader-fringe-killer-filter-1-25","title":"Baader Fringe Killer Filter 1.25\"","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003e1.25\" Baader Fringe Killer Filter\u003c\/h3\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePlaneoptically polished with Phantom Group Coating\u003c\/h4\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-125_200_889b78ff-fcd8-47a9-8a04-a39c269d5ca1.jpg?v=1766557692\" alt=\"Baader Fringe Killer\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eBaader Fringe Killer\u003c\/div\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe most delicate details of lunar craters and planetary surfaces are much more visible!\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader Fringe-Killer Filter prevents unwanted colour fringes in both the blue spectral range and in the IR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality! This fine optical precision tool also allows inexpensive refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.\u003c\/p\u003e\u003cdiv class=\"emptyClear\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; font-family: \" open sans sans-serif both rgb clear:=\"\" height:=\"\" font-size:=\"\" color:=\"\" background-color:=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" width=\"150\" height=\"144\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eExample of Sirius with and without the Fringe Killer\u003cbr style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eThe Baader Fringe Killer Overview\u003c\/h4\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eFACTS AND FIGURES\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eForms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eAchieved in the passband the highest transmission rate of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eBuilt-in IR-cut filter for the range 656-1150 nm; perfect for the CCD and Digital Camera-use in deep sky, moon or planets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eThe clearly visible colour correction of the Baader Fringe Killer. \u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eTHE HIGHLIGHTS OF THE BAADER FRINGE KILLER\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eProvides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eCancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eEven weak nuances remain clearly visible in the planet due to the excellent colour balance.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eIn conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eThe combination with the Neodymium Skyglow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003ePlaneoptically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eNo deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eHight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eMakes the performance of a simple f\/8 economy refractor look like a classic f\/15 Fraunhofer achromat. See it to believe it!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013614170223,"sku":"FFK-1","price":129.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FFR__96052.jpg?v=1766557700"},{"product_id":"moon-filter-1-25","title":"MOON FILTER - 1.25\"","description":"\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThe Moon has the distinction of being the most often viewed celestial object through backyard telescopes. It is undoubtedly beautiful and mysterious, and is one of those constants in our lives that connects us to every other being on our planet. Regardless of who we are or where we live or travel, we all look at the same moon.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eIt is difficult to look at the Moon through a telescope and see all of the details due to its brightness. Our eyes are not ready for the bright beam of light that emits from the eyepiece, and they “stop down”, just as they would when you step out into the sunlight on a bright summer’s day. When we’re in the sunlight, we often wear sunglasses. They help us relax our eyes, protect us from glare, and help us see things more clearly. When amateur astronomers observe the Moon, we use a moon filter. A Celestron Moon Filter provides similar benefits to those of sunglasses...our eye relaxes and opens up to let us see more detail. This is especially important when observing the Moon when it is near full.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThe Celestron Moon Filter simply screws onto the insert barrel of most 1.25” eyepieces. It only takes a second or two to transform your regular eyepiece into one suited for lunar observations. A Moon Filter is also helpful when observing Venus or bright terrestrial scenes. This filter is not suitable for viewing the Sun.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013646184559,"sku":"94119","price":18.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/94119-A_Moon_Filter_1-25_01_570x3803x__18346.jpg?v=1766558523"},{"product_id":"baader-semi-apo-filter-2","title":"Baader Semi APO Filter 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\" padding:=\"\" margin-left:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eTwo filters made into one for maximum brightness\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eCombines Fringe-Killer with Moon \u0026amp; Skyglow for Semi-APO contrast with refractors\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eNon-aging sealed coating edges\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\"\u003eBaader's ideal solution for Achromat owners. The Semi-APO works like it's name implies - delivering a very neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats. The Semi-APO filter combines a stronger Fringe Killer coating formula with the Moon\u0026amp;Skyglow Neodymium substrate. The result is similar performance to the Fringe Killer + Moon\u0026amp;Skyglow combination, but with a slightly stronger violet cut - and at an even greater $$ value.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe Semi-APO filter benefits from all the host of world-class Baader filter attributes. The Semi-APO filter is truly the world's most advanced 'minus-violet' type filter in every regard. It's high efficiency and neutral coloration make it practically disappear in use - while making most of the violet fringe disappear! The effects on sharpness, contrast, and aesthetics are remarkable, even with small refractors. The RGB enhancement of the Neodymium substrate actually boosts color contrasts, particularly for Jupiter and Mars.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eAs a side benefit, the Semi-APO filter has also proven to be the best Mars filter we've used - with ALL Telescopes, including large Dobsonians, SCTs, and Apochromats. The unique properties that result from the combination of the Fringe Killer's blue wavelength attenuation (attenuation - not total elimination), plus the selective Neodymium RGB passbands, result in a significant contrast enhancement of Martian features. The image retains its natural coloration and brightness, and the optically polished surfaces maintain every bit of the image sharpness, unlike other manufacturer's filters.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe high quality of Baader Planetarium filters permits their use well ahead of the focal plane with no image degradation (ie, for cameras or binoviewers). The inclusion of Baader's renowned UV\/IR Cut coatings on the Semi-APO eliminate UV and IR wavelengths to make it ideal for high-resolution imaging with Webcams, DSLR, and CCD cameras (see the UV\/IR Cut filter below, for more detail on these coatings). The high transmission and fringe reduction work great for both planetary and deep sky imaging.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013683671151,"sku":"FSAPO-2","price":210.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Semi_252520APO_2525202__88570.1682640796.1280.1280.jpg?v=1766559681"},{"product_id":"optolong-variable-polarizer-filter-1-25","title":"Optolong Variable Polarizer Filter - 1.25\"","description":"\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Variable Polarizing Filter - 1.25”\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAdjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is similar to a pair of sunglasses. They work fine, but sometimes the scene is too dark or too bright, and there’s not a lot you can do about it. A variable polarizing filter is much more flexible than a Moon filter. It allows you to set the percentage of attenuation by turning the top section of the two-piece filter. Simply attach the 1.25” threaded filter to a like-sized eyepiece or astro accessory barrel, and then slowly rotate the top half of the filter—it turns 360°—to achieve the results you desire. Now you can apply more filtering to a full moon and less to a beautiful crescent—it’s your call!\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 Optolong 1.25” Variable Polarizing Filter also works great to cut brightness when you are using your telescope for terrestrial observations or photography. If you have ever done photography through a SLR or DSLR camera, you may have already been introduced to the qualities of a polarizing filter, since it is a very popular accessory for polarizing the light and making the sky appear more blue. You will especially appreciate a polarizing filter when viewing over water or photographing a scene that includes a river or body of water. Simply turn the filter until you achieve the most glare-free results—you will really see the difference!\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 Optolong 1.25” Variable Polarizing Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 26mm.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eQuality Filter Materials:\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;\"\u003eSchott B260 substrate material from Germany, 2.0mm thick\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eCNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eMultiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition\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-weight: bold; font-family: Arial;\"\u003eOptolong Filter Manufacturing Processes and Parameters\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;\"\u003eFilter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality, according to MIL-O-13830, is 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e95% transmission\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThin metal cells have a clear aperture of 26mm for 1.25” filters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eEach filter comes with a plastic case with high pressure EVA case lining\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013688160367,"sku":"VPO-125","price":59.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/variable_polarizer_125_grande_1__48237.png?v=1766559804"},{"product_id":"optolong-planetary-filter-kit-1-25","title":"Optolong Planetary Filter Kit - 1.25\"","description":"\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eOptolong Planetary Filters Kit \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong Planetary filters kit including UV\/IR Cut, R, G, B and IR685 filter, 5pcs filters in total. These five filters are bundled by \"Solar System Seal\".\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eWhat filters are used for Planetary photography?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003ePhotography of planets and deepsky imaging, both are fine to use the combination of monochrome camera and filters. But slightly different, planets photography will not use what deepsky image use like Ha, SII, OIII filter. Planetary photography using filters often are IR, UV, filters, etc. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe main aim is to capture the specific spectrum, such as rich carbon dioxide. One of the most common filter used is an infrared filter or IR filter\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn nature, the longer the wavelength of light, the less affected it is by atmospheric seeing. Relatively, receiving the influence of red light, or infrared light is far less than the other bands. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThus when imaging a planet, and to aid in reducing the influence of less than optimal seeing conditions, the use of an an IR filter is used to capture  only  infrared, or near-infrared light. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn visible light, planetary imagers will use the more traditional RGB filters. For Mercury, Venus, Uranus and Neptune, IR685 comes fist, and for Saturn, Jupiter, UV\/IR Cut, R, G, B are good. However, the portfolio of IRRGB is popular. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; background-color: rgb(0, 0, 205); color: rgb(255, 255, 255);\"\u003eIR685 Introduction\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong IR Pass685 filter is designed to block the most visible lights and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths. The advantage of the IR685 filter is to reduce the effects of atmospheric jitter. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe sensor of  a CCD or CMOS camera is capable of detecting light in the 350nm -1100nm range including infrared wavelengths. Optolong IR685 cuts off the visible part of the spectrum and allows near infrared light to pass.  In poor seeing conditions the light signal that is most effected by this atmospheric condition is rejected. It will highly improves images on visibility, contrast and details of planets and the moon.  IR685 is usually used as a key factor of portfolio IRRGB. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eImaging Target:\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIR685 is for imaging of bright planets, stars, and comet, like Uranus, Neptune, Jupiter, Saturn, Mars, Moon, et. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR685 Spectrum for Reference\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a55a2444e33d1df2170a42299f735741_c208151a-805b-45e5-acb8-5b4a87dc48bf.png?v=1766561971\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 346px; width: 631px;\"\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eHow to read the chart?\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe vertical axis is Transmission in %.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR685 characteristic:\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eTave: T\u0026gt;95%\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eTransmission area: 700-1100nm\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eBlocking are:  300-600nm\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eBlocking depth: blocked\u0026gt;99%\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSurface quality: 60\/40(Refer to MIL-O-13830)\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSurface accuracy: ?\/4\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eParallelism: 30'\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; background-color: rgb(0, 0, 205); color: rgb(255, 255, 255);\"\u003eUV\/IR Cut, R, G, B Filters Introduction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eUV and IR light focus at a different point.  Optolong UV\/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum.  This will eliminate star bloat from your images.  \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong RGB set divides the spectrum into its components red, green and blue. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eRGB, parfocal: 1:1:1\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eCreate images in their true original colors showing a wealth of natural detail;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSteep bandpass filters to eliminate UV and IR interference;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eUV\/IR Cut, Red, Green, and Blue filters to reproduce the star's color;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eMain use \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn visible light, astrophotographers are use  traditional RGB fitters. If you have Optolong LRGB filters, just try R filter for moon photography, and expect good results. If you want more clear details of the Moon, then consider Optolong IR685 filter.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSuitable for color CMOS and CCD cameras and modified DSLRs;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eAvailable to assist in focusing;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eAct as an outstanding dust shield, which prevents the possibility of dust settling on the lens when long time exposure. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eUV\/IR Cut, R, G, B Filters Spectrum for Reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3a6352900ea5f34a85be941765242934_753e81ef-dd74-4e51-8e0b-da9d5e87f5d0.png?v=1766561972\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 495px; width: 800px;\"\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eHow to read the chart?\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe vertical axis is Transmission in %.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe WHITE line shows the transmission of the UV\/IR Cut filter. R filters line is shown in RED. G filter line is shown in GREEN. And the B filter line is shown in BLUE.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013756579951,"sku":"O-UVIRGB685-1","price":349.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/o-UVIRRGB685__63068.jpg?v=1766561975"},{"product_id":"optolong-variable-polarizer-filter-2","title":"Optolong Variable Polarizer Filter - 2\"","description":"\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Variable Polarizing Filter - 1.25”\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAdjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is similar to a pair of sunglasses. They work fine, but sometimes the scene is too dark or too bright, and there’s not a lot you can do about it. A variable polarizing filter is much more flexible than a Moon filter. It allows you to set the percentage of attenuation by turning the top section of the two-piece filter. Simply attach the 1.25” threaded filter to a like-sized eyepiece or astro accessory barrel, and then slowly rotate the top half of the filter—it turns 360°—to achieve the results you desire. Now you can apply more filtering to a full moon and less to a beautiful crescent—it’s your call!\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 Optolong 1.25” Variable Polarizing Filter also works great to cut brightness when you are using your telescope for terrestrial observations or photography. If you have ever done photography through a SLR or DSLR camera, you may have already been introduced to the qualities of a polarizing filter, since it is a very popular accessory for polarizing the light and making the sky appear more blue. You will especially appreciate a polarizing filter when viewing over water or photographing a scene that includes a river or body of water. Simply turn the filter until you achieve the most glare-free results—you will really see the difference!\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 Optolong 1.25” Variable Polarizing Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 26mm.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eQuality Filter Materials:\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;\"\u003eSchott B260 substrate material from Germany, 2.0mm thick\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eCNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eMultiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition\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-weight: bold; font-family: Arial;\"\u003eOptolong Filter Manufacturing Processes and Parameters\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;\"\u003eFilter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality, according to MIL-O-13830, is 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e95% transmission\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThin metal cells have a clear aperture of 26mm for 1.25” filters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eEach filter comes with a plastic case with high pressure EVA case lining\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013884276847,"sku":"VPO-2","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/variable_polarizer_125_grande_1__34952.png?v=1766565480"},{"product_id":"variable-polarizing-filter-1-25","title":"Variable Polarizing Filter - 1.25”","description":"\u003cul\u003e\n\u003cli\u003eA customizable way to reduce brightness and glare on the brightest celestial objects like the Moon, Venus, and bright double stars\u003c\/li\u003e\n\u003cli\u003eAdjust the level of light transmission from 1-40% for the best possible view for your specific target and current viewing conditions\u003c\/li\u003e\n\u003cli\u003eSimple to use—just rotate filter’s lower ring to adjust brightness\u003c\/li\u003e\n\u003cli\u003eThreads onto any Celestron 1.25” eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA customizable way to reduce brightness and glare on the brightest celestial objects like the Moon, Venus, and bright double stars\u003c\/p\u003e\n\u003cp\u003eAdjust the level of light transmission from 1-40% for the best possible view for your specific target and current viewing conditions\u003c\/p\u003e\n\u003cp\u003eSimple to use—just rotate filter’s lower ring to adjust brightness\u003c\/p\u003e\n\u003cp\u003eThreads onto any Celestron 1.25” eyepiece\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44014089601135,"sku":"94107","price":59.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/94107_Variable_Polarizing_Filter_1-25_01_570x3802x__14959.jpg?v=1766570602"},{"product_id":"nd3-0-neutral-density-filter-1-25","title":"ND3.0 neutral density filter 1.25\"","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1.  Neutral Density Filters Introduction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNeutral Density (ND) filters are designed to reduce transmission evenly acorss a portion of a specific spectrum. ND filters are typically defined by their Optical Density (OD) which describes the amount of energy blocked by the filter. A high optical density value indicates very low transmission, and low optical density indicates high transmission (Equations 1-2). ND filters can be stacked to achieve a customs optical density. To calculate the final system OD, simply add the OD of each filter together.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypes of Neutral Density Filters\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere are two types of ND filters: reflective and absorptive.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReflective ND filters\u003c\/strong\u003e consist of thin film optical coating, typically metallic, that have been applied to a galls substrate. The coating can be optimized for specific wavelength ranges such as UV-VIS or NIR. Thin film coaitng primarily reflects light back toward the source. Special care should be taken to ensure the reflected light does not interfere with the system setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAbsorptive ND filters\u003c\/strong\u003e utlize a glass substrate to absorb light by a specific percentage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e2. ND3.0 Filter Characteristic\u003c\/strong\u003e\u003cbr\u003eSbustrate: optical galss\u003cbr\u003eThickness: 1.85mm\u003cbr\u003eT=0.1%\u003cbr\u003eSurface quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014103658607,"sku":"O-ND3-1","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ND3-a__80533.jpg?v=1766571329"},{"product_id":"baader-semi-apo-filter-1-25","title":"Baader Semi APO Filter 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\" padding:=\"\" margin-left:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eTwo filters made into one for maximum brightness\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eCombines Fringe-Killer with Moon \u0026amp; Skyglow for Semi-APO contrast with refractors\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eNon-aging sealed coating edges\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\"\u003eBaader's ideal solution for Achromat owners. The Semi-APO works like it's name implies - delivering a very neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats. The Semi-APO filter combines a stronger Fringe Killer coating formula with the Moon\u0026amp;Skyglow Neodymium substrate. The result is similar performance to the Fringe Killer + Moon\u0026amp;Skyglow combination, but with a slightly stronger violet cut - and at an even greater $$ value.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe Semi-APO filter benefits from all the host of world-class Baader filter attributes. The Semi-APO filter is truly the world's most advanced 'minus-violet' type filter in every regard. It's high efficiency and neutral coloration make it practically disappear in use - while making most of the violet fringe disappear! The effects on sharpness, contrast, and aesthetics are remarkable, even with small refractors. The RGB enhancement of the Neodymium substrate actually boosts color contrasts, particularly for Jupiter and Mars.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eAs a side benefit, the Semi-APO filter has also proven to be the best Mars filter we've used - with ALL Telescopes, including large Dobsonians, SCTs, and Apochromats. The unique properties that result from the combination of the Fringe Killer's blue wavelength attenuation (attenuation - not total elimination), plus the selective Neodymium RGB passbands, result in a significant contrast enhancement of Martian features. The image retains its natural coloration and brightness, and the optically polished surfaces maintain every bit of the image sharpness, unlike other manufacturer's filters.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe high quality of Baader Planetarium filters permits their use well ahead of the focal plane with no image degradation (ie, for cameras or binoviewers). The inclusion of Baader's renowned UV\/IR Cut coatings on the Semi-APO eliminate UV and IR wavelengths to make it ideal for high-resolution imaging with Webcams, DSLR, and CCD cameras (see the UV\/IR Cut filter below, for more detail on these coatings). The high transmission and fringe reduction work great for both planetary and deep sky imaging.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44038681100399,"sku":"FSAPO-1","price":94.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fsapo-1_11_2__08679.jpg?v=1767595370"},{"product_id":"explore-scientific-1-25-inch-nd-0-9-neutral-density-moon-filter","title":"Explore Scientific 1.25-inch ND 0.9 Neutral Density Moon Filter with 13 Percent Transmission","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis is the Explore Scientific ND96 neutral density filter in the 1.25-inch size, item 310245, supplied at an optical density of 0.9. Explore Scientific publishes a transmission figure of 13 per cent and describes the filter as transmitting light uniformly across the entire visual spectrum. In practice that means it takes roughly seven eighths of the light out of the view without tinting it, which is exactly what you want when the problem is simply too much brightness. The vendor recommends it for reducing glare and irradiation when observing the Moon with any telescope of 4 inches (10.2cm) aperture and larger, and notes its usefulness in splitting close double stars where one member of the pair is far brighter than the other.\u003c\/p\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eAnyone who has put a 6-inch or 8-inch telescope on a gibbous Moon knows the problem this solves. The Moon is not a faint object; through a decent aperture it is dazzling, and the dazzle is not just uncomfortable. Once the eye is flooded, it loses the ability to discriminate subtle tonal differences, and irradiation, the tendency of a very bright area to visually bleed into the dark area beside it, softens the terminator and washes out the low-contrast detail on crater floors and mare surfaces. You end up seeing a brilliant white disc rather than a landscape. Cutting the brightness back lets the eye work in a comfortable range again, and detail that was always in the image becomes visible.\u003c\/p\u003e\u003cp\u003eThe second job is double stars. When a bright primary sits close to a much fainter companion, the glare halo around the primary can simply swallow the companion. Dimming both by the same factor shrinks that halo and often lifts the secondary clear of it, which is why experienced double star observers keep a neutral density filter in the case even when the Moon is nowhere in the sky.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Design\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOptical density of 0.9, giving a published transmission of 13 per cent across the visual spectrum\u003c\/li\u003e\n\u003cli\u003eNeutral by design, so lunar and planetary colour and albedo relationships are preserved rather than tinted\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch filter thread that fits the barrel of most 1.25-inch eyepieces and many diagonals\u003c\/li\u003e\n\u003cli\u003eRecommended by Explore Scientific for telescopes of 4 inches (10.2cm) aperture and larger\u003c\/li\u003e\n\u003cli\u003eUseful on unequal double star pairs where glare from the primary hides the companion\u003c\/li\u003e\n\u003cli\u003eThreads onto other 1.25-inch filters if you want to stack density or combine with a colour filter\u003c\/li\u003e\n\u003cli\u003eEntirely passive, with no power, adapters or maintenance required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFilter Design\u003c\/h2\u003e\u003cp\u003eOptical density is a base-ten logarithmic measure of attenuation. A density of 0.9 corresponds to ten raised to the power of minus 0.9, which is about 0.126, or the 13 per cent that Explore Scientific publishes. Expressed another way, the filter costs you a little over two magnitudes of brightness. The important word in the name is neutral: the attenuation is intended to be flat with wavelength, so red, green and blue are reduced by the same proportion. That is what separates a neutral density filter from a coloured or so-called moon filter with a green cast, which changes the apparent tone of what you are looking at. Because lunar and planetary observing depends heavily on reading subtle albedo differences, keeping the response flat matters more than it might sound. The other reason density is chosen rather than simply stopping down the aperture is resolution. An aperture mask reduces brightness but also reduces the resolving power and increases the diffraction pattern, whereas a neutral density filter leaves the full aperture and its full resolution intact and only removes light.\u003c\/p\u003e\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLunar observing near first and last quarter through to full, especially with 4-inch and larger telescopes\u003c\/li\u003e\n\u003cli\u003eSplitting close double stars where the components differ significantly in brightness\u003c\/li\u003e\n\u003cli\u003eTaming brightness on Venus, which is dazzling and largely featureless at full aperture\u003c\/li\u003e\n\u003cli\u003eComfortable extended lunar sessions and public viewing, where eye fatigue is a real limit\u003c\/li\u003e\n\u003cli\u003eStacking with a second filter when the Moon is full and a single density is not enough\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\u003cp\u003eThe cell uses the common 1.25-inch filter thread and screws into the barrel of the great majority of 1.25-inch eyepieces, as well as many 1.25-inch star diagonals and camera nosepieces. Because the front of the cell is also threaded, you can stack this filter with another neutral density or with a colour filter, though every additional glass surface adds a little scatter, so stack only when you need to. If you use 2-inch eyepieces, this filter will not fit them and you will want the 2-inch equivalent. If you are unsure whether your particular eyepiece barrel is threaded, send us the model and our team in Bolton will confirm before you order.\u003c\/p\u003e\u003ch2\u003eGood to Know Before You Order\u003c\/h2\u003e\u003cp\u003eExplore Scientific publishes no shipping weight for this item, so we are confirming it on our own scales before the listing goes live. That is why it is currently unpublished. Contact us and we will give you a shipping figure for your address. Two other things are worth stating plainly. First, this is not a solar filter and must never be used to look at the Sun. Neutral density filters of this type are eyepiece filters, and no eyepiece filter is safe for solar observing; solar work requires a certified full aperture filter fitted at the front of the telescope. Second, 0.9 is a moderate density. On a full Moon through a large aperture some observers still find it bright and prefer to stack a second filter or step up to a variable polarising filter that can be dialled continuously. Only the filter and its case are included.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow much does it actually dim the view?\u003c\/strong\u003e To about 13 per cent of the unfiltered brightness, a little over two magnitudes. That is a substantial cut and it is the right order of magnitude for the Moon in a 4-inch to 10-inch telescope.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it add a colour cast?\u003c\/strong\u003e It is designed not to. The attenuation is intended to be uniform across the visual spectrum, which is why it is called neutral density and why it suits lunar and planetary work where subtle tonal differences carry the detail.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it to look at the Sun?\u003c\/strong\u003e No, under no circumstances. Use only a properly certified full aperture solar filter for the Sun. Contact us if you need advice on safe solar equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs it useful in a small telescope?\u003c\/strong\u003e Explore Scientific recommends it for apertures of 4 inches and larger. In a 60mm or 80mm refractor the Moon is usually manageable without it, although a full Moon can still be bright enough to justify one.\u003c\/p\u003e\u003ch2\u003eBottom Line\u003c\/h2\u003e\u003cp\u003eA neutral density filter is a small, inexpensive accessory that makes the single most-observed object in the sky far more rewarding to look at, and it earns its keep again on tight, unequal double stars. At 0.9 density it is a sensible general-purpose choice for most amateur apertures. Contact our team in Bolton if you would like help choosing between a fixed density like this one and a variable polarising filter.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":53958567460975,"sku":"310245","price":42.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/310245.jpg?v=1785960535"},{"product_id":"explore-scientific-2-inch-variable-polarizing-filter","title":"Explore Scientific 2-inch Variable Polarizing Filter with Continuously Adjustable Brightness","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Explore Scientific 2-inch Variable Polarizing Filter, item 310250, is a two-element polarising filter that lets you set image brightness continuously rather than in fixed steps. Explore Scientific publishes a light transmission range of 40 per cent down to 1 per cent, adjusted simply by rotating the two halves of the housing against one another. The cell is black anodised aluminium with a 2-inch filter thread on both the inside and the outside, and the optical elements are described as highly parallel optical glass. A dust cover is supplied. Explore Scientific positions it as a universally applicable filter for lunar, planetary and solar observing, particularly behind a Herschel wedge or on large apertures where brightness needs to come down to a comfortable level.\u003c\/p\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis is the filter for the observer who is tired of swapping fixed densities. Brightness at the eyepiece is a moving target: the Moon changes by several magnitudes between a thin crescent and full, a 12-inch reflector delivers far more light than a 4-inch refractor at the same magnification, and the eyepiece you reach for at the end of the session may be four times faster than the one you started with. A fixed neutral density filter is chosen for one of those situations and is wrong for the others. Here you leave the filter in place and turn the ring until the view looks right, then keep turning as conditions change.\u003c\/p\u003e\u003cp\u003eIt also earns its place with anyone doing white-light solar work behind a Herschel wedge. A wedge dumps the great majority of the solar energy out of the back, but what reaches the eyepiece is still bright, and because a wedge outputs strongly polarised light, a polarising filter behind it is the accepted way to trim the remaining brightness smoothly to a comfortable working level.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Design\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eContinuously variable transmission from a published 40 per cent down to 1 per cent\u003c\/li\u003e\n\u003cli\u003eAdjustment by rotating the two halves of the housing, so brightness can be set at the eyepiece without unthreading anything\u003c\/li\u003e\n\u003cli\u003eStandard 2-inch filter thread on both the inside and the outside of the cell, so it can be sandwiched between accessories or carry a second filter\u003c\/li\u003e\n\u003cli\u003eBlack anodised aluminium housing, which suppresses internal reflections as well as resisting handling wear\u003c\/li\u003e\n\u003cli\u003eHighly parallel optical glass elements, so the filter does not introduce wedge error into the converging beam\u003c\/li\u003e\n\u003cli\u003eWell suited to Herschel wedge solar work, where the output is already polarised\u003c\/li\u003e\n\u003cli\u003eDust cover included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFilter Design\u003c\/h2\u003e\u003cp\u003eThe filter is a pair of linear polarisers mounted in the two rotating halves of the cell. Starlight and reflected sunlight arriving at the telescope are effectively unpolarised, so the first element passes only the component aligned with its own axis, which is why the maximum transmission is around 40 per cent rather than anything close to 100. The second element then acts on light that is already polarised, and the fraction it passes follows the square of the cosine of the angle between the two axes. With the axes parallel you are at maximum transmission; as you rotate towards 90 degrees the transmission falls away steeply, reaching the published 1 per cent at the crossed position. The practical consequence is that the adjustment is not linear across the rotation. Most of the useful range sits in a fairly narrow band of rotation near the crossed end, so a small movement there makes a large difference to brightness. It is worth knowing that both elements are neutral in intent rather than coloured, so the view darkens without taking on the green cast that older single-element moon filters were known for, although a slight warming is normal with polarising material.\u003c\/p\u003e\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLunar observing across all phases, where the required attenuation changes night to night\u003c\/li\u003e\n\u003cli\u003ePlanetary work on bright targets such as Venus, and on Jupiter in a large aperture\u003c\/li\u003e\n\u003cli\u003eWhite-light solar observing behind a Herschel wedge, to trim the residual brightness smoothly\u003c\/li\u003e\n\u003cli\u003eAny large-aperture telescope where the Moon is uncomfortable to look at even through a fixed density filter\u003c\/li\u003e\n\u003cli\u003ePublic observing sessions where the same telescope has to suit many pairs of eyes in a short time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\u003cp\u003eThe cell carries the standard 2-inch filter thread and screws into the barrel of most 2-inch eyepieces, and into many 2-inch star diagonals and adapters. Because the thread is doubled, inside and outside, you can also mount it between two components of a 2-inch train or thread another 2-inch filter onto it. Note that access matters here: you have to be able to reach the cell to rotate it, so mounting it deep inside a diagonal where your fingers cannot get to it defeats the purpose. Most observers thread it onto the eyepiece barrel or the front of the diagonal for that reason. This is the 2-inch version and will not fit 1.25-inch eyepieces. If you want to confirm it will work in a particular diagonal or focuser arrangement, contact our team in Bolton with the models and we will check it for you.\u003c\/p\u003e\u003ch2\u003eGood to Know Before You Order\u003c\/h2\u003e\u003cp\u003eExplore Scientific publishes no shipping weight for this item, so we are confirming it on our own scales before the listing goes live. That is why it is currently unpublished. Contact us and we will give you a shipping figure for your address. On safety, be clear about what the solar reference means: this filter is used behind a Herschel wedge or another certified solar filter that has already removed the dangerous energy. A polarising filter at the eyepiece is never itself a solar filter and must not be used to view the Sun on its own. Also note that a 2-inch filter cell adds physical length and a little weight to the eyepiece end, which can matter on a delicately balanced mount, and that the adjustment being non-linear takes a session or two to get a feel for. What is included is the filter and a dust cover; eyepieces, diagonals and wedges are separate.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow dark can it actually go?\u003c\/strong\u003e Explore Scientific publishes a range of 40 per cent down to 1 per cent transmission. At the dark end that is a reduction of about four magnitudes, which is more than enough for a full Moon in a large aperture.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the maximum only 40 per cent?\u003c\/strong\u003e Because a single linear polariser can only pass the component of unpolarised light aligned with its axis, so about half is lost before the second element does anything. That is inherent to how polarisers work, not a shortcoming of this filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it with a Herschel wedge?\u003c\/strong\u003e Yes, and that is one of its intended uses. The wedge does the safety work and the polariser trims the remaining brightness. Never point a telescope at the Sun without a purpose-made solar device fitted correctly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it fit 1.25-inch eyepieces?\u003c\/strong\u003e No. This is the 2-inch version. Ask us if you need the smaller size instead.\u003c\/p\u003e\u003ch2\u003eBottom Line\u003c\/h2\u003e\u003cp\u003eIf you observe the Moon and planets regularly and own more than one eyepiece, a variable polariser replaces a drawer full of fixed densities and gives you exactly the brightness you want at any moment. The dual 2-inch threading and anodised aluminium cell make it easy to work into an existing train. Contact our team in Bolton if you would like help deciding where in your optical train to fit it.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":53958592036975,"sku":"310250","price":200.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/310250_1.jpg?v=1785960605"}],"url":"https:\/\/ontariotelescope.com\/collections\/visual-planetary-filters.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}