{"title":"Narrowband Filters","description":"\u003cp\u003eNarrowband Filters from every brand we carry. Part of \u003ca href=\"\/collections\/filters\"\u003eFilters\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"h-beta-filter-2","title":"Explore Scientific 2-inch H-Beta Nebula Filter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Explore Scientific H-Beta is a 2.0-inch nebula filter built around a single emission line. Explore Scientific quotes 94.5% transmission across a 478nm to 496nm passband, peaking at 489nm. Everything outside that narrow window is blocked, which includes almost the whole spectrum of artificial lighting.\u003c\/p\u003e\n\u003cp\u003e489nm is where hydrogen-beta sits — the second line of the Balmer series, emitted by ionised hydrogen throughout the interstellar medium. A filter this narrow throws away the sky and keeps the nebula, and the result on the right target is a rise in contrast that no amount of aperture on its own produces.\u003c\/p\u003e\n\u003cp\u003eIt is a 2.0-inch filter, so it threads into 2-inch eyepieces, 2-inch diagonals and standard filter wheels.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObservers working under light-polluted skies\u003c\/strong\u003e on hydrogen-emission nebulae, where blocking everything outside 478–496nm removes most of the sky glow along with it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObservers with real aperture:\u003c\/strong\u003e a passband this narrow removes a great deal of light, and the objects it serves are faint to start with. The more aperture behind it, the more it delivers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeople chasing the classic H-beta targets:\u003c\/strong\u003e the Horsehead and the California Nebula are the two objects most often cited as needing this filter specifically, and both emit strongly at hydrogen-beta.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObservers who already own an oxygen-III or narrowband filter\u003c\/strong\u003e and want to cover the emission line those do not favour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImagers building a filter set\u003c\/strong\u003e where a discrete hydrogen-beta channel is part of the plan.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e94.5% quoted transmission\u003c\/strong\u003e at the passband — a high figure, which matters enormously when the filter is deliberately discarding most of the incoming light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e478nm to 496nm passband, peaking at 489nm:\u003c\/strong\u003e an 18nm window centred on the hydrogen-beta line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocks essentially everything outside the passband,\u003c\/strong\u003e including mercury, sodium and most LED street lighting, which fall well away from 489nm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.0-inch format,\u003c\/strong\u003e compatible with 2-inch eyepieces, 2-inch diagonals and standard filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-line design:\u003c\/strong\u003e unlike a broadband light-pollution filter that passes several regions, this one isolates a single emission line, which is what produces the contrast gain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observing of hydrogen-emission nebulae from suburban and light-polluted sites.\u003c\/li\u003e\n\u003cli\u003eThe Horsehead, the California Nebula and other objects traditionally associated with H-beta.\u003c\/li\u003e\n\u003cli\u003eAdding a discrete hydrogen-beta channel to an existing narrowband filter set.\u003c\/li\u003e\n\u003cli\u003eComparative observing, where switching between an oxygen-III and an H-beta filter shows which part of a nebula emits where.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits 2-inch eyepieces and 2-inch diagonals,\u003c\/strong\u003e threading into the base of the barrel in the usual way, and it fits standard 2-inch filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescopes with 1.25-inch focusers\u003c\/strong\u003e use the 1.25-inch version of the filter rather than this one; we stock both sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs naturally with a low-power, wide-field eyepiece.\u003c\/strong\u003e Large emission nebulae benefit from field as much as from contrast, so a long-focal-length 2-inch eyepiece is the usual partner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplements rather than replaces an oxygen-III filter.\u003c\/strong\u003e The two isolate different emission lines and favour different objects, which is why many observers carry both.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter stacking\u003c\/strong\u003e is possible mechanically, though combining two narrow filters leaves very little light through. One at a time is how these are normally used.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn H-beta filter is a specialist instrument, not a general improvement.\u003c\/strong\u003e On star clusters, galaxies, the Moon and the planets it simply dims the view, because those objects emit across the spectrum rather than at 489nm. It earns its place on a specific and short list of targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIt works best behind aperture.\u003c\/strong\u003e An 18nm passband discards most of the light reaching the telescope, so the same filter that transforms the view in a large instrument may show very little in a small one. Tell us your aperture and we will give you a straight answer about what to expect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe view goes dark and monochrome.\u003c\/strong\u003e That is the filter doing exactly what it is designed to do, and letting your eyes readapt for a few minutes after fitting it is part of using it well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExplore Scientific publishes no specification table for this filter.\u003c\/strong\u003e Substrate, thickness, thread pitch and coating count are absent from the table below rather than estimated. If a physical dimension matters for your filter wheel or drawer, ask and we will measure the item we hold in stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIt is a 2.0-inch filter.\u003c\/strong\u003e A telescope with a 1.25-inch focuser takes the smaller version instead, which we also carry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo — it threads onto the base of a 2-inch eyepiece barrel or into a 2-inch diagonal or filter wheel, and that is the whole of the installation. There is nothing to align or adjust, and it takes about fifteen seconds in the dark once you have done it once.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does it actually do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt passes light between 478nm and 496nm, peaking at 489nm, and blocks the rest. Because hydrogen-beta emission falls inside that window and street lighting does not, the nebula stays and the sky glow largely goes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich objects is it for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNebulae that emit strongly at hydrogen-beta. The Horsehead and the California Nebula are the two most commonly named, and it is worth trying on other emission nebulae to see how they respond.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it the same as an oxygen-III or a light-pollution filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. An oxygen-III filter isolates a different pair of lines and suits a different set of objects; a broadband light-pollution filter passes much more of the spectrum and gives a gentler effect on a wider range of targets. The H-beta is the narrowest and most specialised of the three.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it help with galaxies?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGalaxies emit across the whole spectrum, so a filter that blocks all but 18nm of it dims them. A broadband light-pollution filter is the more useful tool there, and we stock those.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it for imaging?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes — a 2-inch H-beta filter fits standard filter wheels, and the narrow passband works the same way for a sensor as for an eye. Exposures run longer, which is the expected cost of a narrow bandpass.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a 2.0-inch hydrogen-beta filter passing 478nm to 496nm at a quoted 94.5% transmission, peaking at 489nm — a narrow, specialised filter that lifts a short list of emission nebulae out of a bright sky. If you would like help deciding whether an H-beta, an oxygen-III or a broadband filter suits the objects and the aperture you work with, tell us what you observe and we will give you our honest recommendation.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44013257097327,"sku":"310230","price":200.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0310200_PAC_small__83292.jpg?v=1766550367"},{"product_id":"oxygen-iii-2-filter","title":"Explore Scientific 2-inch Oxygen III (OIII) Nebula Filter","description":"\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 13px; font-family: 'Source Sans Pro', sans-serif;\"\u003eOne of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar systems enormously. Depending on the type of the celestial object it is possible to increase the contrast dramatically by blocking the annoying artificial light. The Explore Scientific O-III filter uses a characteristic property of the so called emission nebulae.\u003c\/span\u003e\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 13px; font-family: 'Source Sans Pro', sans-serif;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 13px; font-family: 'Source Sans Pro', sans-serif;\"\u003eThose objects glow in special colors, the so called emission lines. Those emission lines are linked to chemical elements - in this case oxygen. The Explore Scientific O-III nebula filter blocks all other colors (and thereby nearly all of the artificial light) and only the two emission lines of the oxygen can pass the filter. \u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 13px; font-family: 'Source Sans Pro', sans-serif;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 13px; font-family: 'Source Sans Pro', sans-serif;\"\u003eThe result is astonishing: suddenly nebulae are visible at locations that were completely empty without filters. In suburbian skies for example the veil nebula NGC 6992 is almost not visible with a 200mm telescope. By using this filter you can see the nebula and its structures without problems. The Explore Scientific nebula filters come with a individual test certificate - your guarantee to receive a premium filter.\u003c\/span\u003e\u003c\/span\u003e   \u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(50, 50, 50); font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16.2px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(50, 50, 50); font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16.2px; background-color: rgb(255, 255, 255);\"\u003eExplore Scientific 2\" Oxygen-III Nebula Filter. Range from 483nm to 511nm with peak at 496nm. Peak transmission 96.7%. \u003c\/span\u003e\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44013258375279,"sku":"310200","price":184.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0310200_PAC_small__91034.jpg?v=1766550379"},{"product_id":"oxygen-iii-narrowband-filter-2-in","title":"OXYGEN III NARROWBAND FILTER - 2 IN","description":"\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe 2\" OIII narrowband filter isolates the two doubly-ionized oxygen lines (496 and 501nm lines)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eFilter has ultra-hard, vacuum-deposited coating\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eEliminates un-natural colored halos surrounding bright stars\u003c\/span\u003e\u003c\/div\u003e\n\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 2\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.\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;\"\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003c\/span\u003e\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013342031983,"sku":"93624","price":173.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/93624_oxygeniiinarrow_large_1__27538.jpg?v=1766550836"},{"product_id":"zwo-narrowband-1-25-filter","title":"ZWO narrowband 1.25 filter","description":"\u003ch2 style=\"position: relative; padding: 0px 0px 10px; line-height: 28px; color: rgb(238, 57, 57); margin: 0px; font-size: 20px; font-family: \" pt sans narrow sans-serif rgb normal background-color:=\"\" font-weight:=\"\"\u003eProduct Description\u003c\/h2\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eIt can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe ZWO  H-Alpha filter  has a bandpass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it !\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/1.25Ha.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-4500\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1.25Ha-1024x1024_6af26116-6ca5-400e-9a2c-872e8639bcd5.jpg?v=1766551095\" alt=\"1-25ha\" width=\"1024\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation . It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/1.25SII.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-4501\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1.25SII-1024x1024_7e7b866f-bfc9-4799-9c7b-825784902c8b.jpg?v=1766551097\" alt=\"1-25sii\" width=\"1024\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe ZWO nrrowband O-III 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulas in a totally new light, no matter how polluted your skies may be!\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/1.25OIII1.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-4503\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1.25OIII1-1024x1024_31ffc02d-3294-4750-8239-b456cd576fd8.jpg?v=1766551098\" alt=\"1-25oiii1\" width=\"1024\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eFWHM 7±0.5nm\u003cbr\u003eThickness 1.9+\/-0.03 mm  (1.25 \/31mm\/36mm)\u003cbr\u003eFine-optically polished to ensure accurate 1\/4 wavefront  over the both surfaces\u003cbr\u003e80% transmission at H-alpha line 656nm (H-Alpha filter )\u003cbr\u003e80% transmission at SII line 672nm (SII filter )\u003cbr\u003e80% transmission at major OIII line 500nm (OIII filter )\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44013362053231,"sku":"1.25\" NB set","price":517.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/125-SET11-460x460__02852.jpg?v=1766551100"},{"product_id":"baader-2-oiii-filter-8-5nm","title":"Baader 2\" OIII filter 8.5nm","description":"\u003ccenter style=\"margin: 15px 0px; padding: 0px; font-family: \" open sans sans-serif font-size:=\"\"\u003e\u003ch2 style=\"margin: 0px; padding: 0px; font-size: 16px;\"\u003eBaader 2\" Narrowband 8.5 nm O-III CCD Filter\u003c\/h2\u003e\u003c\/center\u003e\u003cp style=\"margin: 10px 0px; padding: 0px; font-family: \" open sans sans-serif justify font-size:=\"\" text-align:=\"\"\u003eThe Baader Planetarium Oxygen III Nebula Filter delivers the absolute highest contrast deep sky images of many diffuse and planetary nebula. Baader Planetarium's premium Narrowband CCD passfilters are a must-have when it comes to excellent photography with modern CCD cameras. Providing the shortest exposures possible, the ultra-narrow bandwidths have extremely high transmission while completely rejecting light pollution and blocking longer wavelengths.\u003c\/p\u003e\u003cul style=\"margin: 5px 40px; padding: 0px; list-style: none; font-family: \" open sans sans-serif justify font-size:=\"\" text-align:=\"\"\u003e\n\u003cli style=\"margin: 0px; padding: 0px; list-style-type: disc;\"\u003eBaader Planetarium Narrowband O-III (8.5 nm) CCD-Filter, in a 2\" threaded cell\u003cp style=\"margin: 10px 0px; padding: 0px;\"\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; list-style-type: disc;\"\u003eThis filter transmits over 90% of light and at the same time completely rejects light pollution\u003cp style=\"margin: 10px 0px; padding: 0px;\"\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; list-style-type: disc;\"\u003eMulti-layer dielectric coatings are plasma-assisted and ion beam-hardened using the latest technology\u003cp style=\"margin: 10px 0px; padding: 0px;\"\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; list-style-type: disc;\"\u003eBaader Planetarium Narrowband O-III (8.5 nm) CCD Filters will never degrade from use or normal cleaning\u003cp style=\"margin: 10px 0px; padding: 0px;\"\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 10px 0px; padding: 0px; font-family: \" open sans sans-serif justify font-size:=\"\" text-align:=\"\"\u003eDelivering a smooth and accurate 1\/4 wave wavefront over the entire surface, each substrate is fine-optically-polished delivering exceptional performance. The special custom polishing operation Baader executes on all Narrowband passfilters makes the difference compared to standard commercially-made polished filter substrates. In the production process for Baader Narrowband CCD passfilters, consideration of eliminating annoying reflections present in other narrowband astro-filters was a key component. In order to succeed in assuring freedom from reflections, Baader's production process required careful design and testing of the coating stacks. This research work resulted in the fine, high-quality Narrowband 8.5 nm O-III CCD Filter offered here.\u003c\/p\u003e\u003ccenter style=\"box-sizing: border-box; margin: 0px; padding: 0px; font-family: \" open sans arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ch1 style=\"box-sizing: border-box; margin: 0px 0px 0.7em; padding: 0px; font-size: 16px; font-weight: 400; font-family: Raleway, \" helvetica neue verdana arial sans-serif line-height: text-rendering: optimizelegibility text-transform: uppercase\u003e\u003c\/h1\u003e\u003c\/center\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013368049775,"sku":"FOIIIN-2","price":330.74,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OIII_1-2__77884.jpg?v=1766551432"},{"product_id":"1-25-oiii-filter","title":"1.25\" OIII filter","description":"\u003ch1\u003e\u003cspan style=\"font-size:20.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eOverview\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cp\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:\" arial\u003eThe 1-1\/4\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planet...\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003ch1\u003e\u003cspan style=\"font-size:20.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eDescription\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cp\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:\" arial\u003eThe 1-1\/4\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003cp\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:\" arial\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013369065583,"sku":"93623","price":131.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/93623_Oxygen_III_Narrowband_Filter_1__65470.jpg?v=1766551552"},{"product_id":"badder-narrow-band-filter-set","title":"Badder Narrow Band filter set","description":"\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003eThis Package consists of Hydrogyn Alpha, Oxygen III and Sodium II 1.25\" filters \u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cspan style=\"font-family: \" open sans sans-serif justify font-size:=\"\" text-align:=\"\"\u003eDelivering the absolute highest contrast deep sky images in H-Alpha, Oxygen III, and Sodium-II, Baader Planetarium's Premium Narrowband CCD passfilters are a must have when it comes time to excellent photography and observation. With the shortest exposures possible, the ultra-narrow bandwidths have extremely high transmission while completely rejecting light pollution and blocking longer wavelengths. The coatings on all Baader products are professionally applied in Germany, by the most sophisticated equipment available today. This application process ensures high consistency for bandpass centering, out of band blocking, and transmission.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003eBaader Narrowband 7 nm H-Alpha Filter comes in a 1.25\" threaded cell\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003eBaader Planetarium Narrowband O-III 8.5 nm CCD Filter comes in a 1.25\" threaded cell\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003eBaader Planetarium Narrowband 8 nm S-II CCD-Filter, in a 1.25\" threaded cell\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" open sans sans-serif font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013467172975,"sku":"FN-HOS-1","price":669.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/125_252520narrow_252520combo__75624.1682640212.1280.1280.jpg?v=1766553990"},{"product_id":"baader-u-venus-filter-2-350nm","title":"Baader U-Venus-Filter 2\" (350nm)","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_3815bdf4-45d1-46e7-bcc2-18725aec9553.jpg?v=1766554292\" 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_a097ff7b-ba72-48a4-9257-d548b7ced785.jpg?v=1766554281\" 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_cb73f49c-1c46-4aea-a7c3-ac5575e05efe.jpg?v=1766554284\" 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_eba76d0b-d741-47bb-af43-cfaccc8177e2.jpg?v=1766554286\" 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_92a409e1-e39f-4e79-b80c-39b97e3e60ee.gif?v=1766554289\" 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_3815bdf4-45d1-46e7-bcc2-18725aec9553.jpg?v=1766554292\" 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_3815bdf4-45d1-46e7-bcc2-18725aec9553.jpg?v=1766554292\" 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_9dea3507-7a4b-4819-9210-3d6813f1a675.jpg?v=1766554295\" 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":44013472710767,"sku":"FUV-2","price":556.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Baader_252520U_252520filter__80456.1682640250.1280.1280.jpg?v=1766554297"},{"product_id":"sho-1-25-narrowband-filter-kit","title":"SHO 1.25\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542309999,"sku":"O-SHO-1","price":679.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/125_252520SHO__83393.1682640428.1280.1280.jpg?v=1766555826"},{"product_id":"sho-2-narrowband-filter-kit","title":"SHO 2\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542539375,"sku":"O-SHO-2","price":989.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2_inch_filter_set_with_h-alpha_sii_and_oiii_filteres__16429.jpg?v=1766555832"},{"product_id":"sho-36mm-narrowband-filter-kit","title":"SHO 36mm\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542637679,"sku":"O-SHO-36","price":809.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/unmounted_filter_set_with_h-alpha_sii_and_oiii_filters__05831.jpg?v=1766555837"},{"product_id":"baader-h-beta-8-5nm-ccd-narrowband-filter-2","title":"Baader H-beta 8.5nm CCD Narrowband-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:=\"\"\u003e\n\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(94, 169, 221);\"\u003eBaader H-Beta-Filter\u003c\/span\u003e \u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(99, 99, 99);\"\u003e– the\u003c\/span\u003e H-Alpha-Filter \u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(99, 99, 99);\"\u003efor visual observations!\u003c\/span\u003e\n\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 \u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eBaader H-Beta-Filter with 8.5nm half width\u003c\/strong\u003e is especially useful at telescopes with 8\" or larger apertures or if you are working with large exit pupils. This narrowband-filter delivers a much higher contrast, compared to common visual H-beta-filters. H-Beta-nebule-filters with a wider half-width deliver a brighter image and will also show you e.g. the California nebula,but it won't be so clear, and you will miss many of its inner structures. Without any filter, this nebula (to name just one of many) will be completely invisible under brighter skies.\u003c\/p\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:=\"\"\u003eAbout \u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(235, 2, 53);\"\u003eBaader H-alpha Filters\u003c\/span\u003e and why they aren't suited for visual observations\u003c\/h4\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 development of narrow-band H-Alpha-filters soon proved to be a \"Game-Changer\" for Amateur-Astrophotographers. No other spectral line of emission nebulae will give you so much information for the creation of \"pretty pictures\" as this Hydrogen-line. This is supported by the better coatings, sensitive CCD-cameras, motorized focusers and last but not least the the incredible tracking precision of modern mounts, which allow for very long exposure times with very narrow-band filters. Modern images are often based on exposure times of 30 hours through the three common, very narrow-band nebula filters. But to make use of this, the mount must provide \"subpixel\"-tracking, the focuser must not flex even for a micron, and its motor must compensated for temperature changes by keeping the focus up to a fraction of a millimeter... All this is possible – but you need high-end equipment.\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;\"\u003eThis is not necessary for visual observations.\u003c\/strong\u003e But unfortunately, we do not profit from those photographically wonderful filters when we are looking through the eyepiece – at low intensities at night, the human eye is almost blind for this part of the spectrum. During daylight, when there is plenty of light, we can easily see H-Alpha. But at night and low-light, we can't perceive these wavelengths. In contrast to a camera, our eyes also can't add upp the light.\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:=\"\"\u003eBecause of this, most visual observers use the well-known \u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eO III-filter\u003c\/strong\u003e. The human eye has got its highest sensitivity between 500nm and 520nm, where we can observe many structures in supernova-remnants, planetary nebulae and so on. But they are pretty useless for deep sky objects which shine mainly in H-alpha.\u003c\/p\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 alternative – \u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(94, 169, 221);\"\u003eBaader H-Beta filter\u003c\/span\u003e for visual applications\u003c\/h4\u003e\u003cspan style=\"color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eFor the H-alpha-objects mentioned above, the H-beta-line is a good option: At 486nm, it still quite close to the region of highest sensitivity of our eye. Because of quantum-mechanical coupling with H-Alpha, we can usually see the same structures. \u003c\/span\u003e\u003cspan style=\"font-weight: bold;\"\u003eH-Beta-filters are much more efficient than O-III,\u003c\/span\u003e\u003cspan style=\"color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e because most nebulae emit hydrogen-light – although H-Beta is not as popular as H-Beta.\u003c\/span\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;\"\u003eA H-beta filter can be regarded as a visual H-Alpha-filter.\u003c\/strong\u003e\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 H-Beta-spectrum is indeed very interesting. Quantum-mechanics define a fixed ratio between H-Alpha and H-Beta, but because of the shorter wavelengths, H-Beta has got a higher energy. That's why H-Beta suffers from a higher extinction rate in interstellar dust regions, which can easily be detected. The ratio between H-Beta and H-Alpha gives you information about the amount of dust between us and the source, which is especially interesting for scientific work. For astrophotography, you can scale down the intensity of H-Alpha to simulate an H-Beta-filter – and if you are observing with your eyepiece, you will see structures which were almost invisible before.\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:=\"\"\u003eVisual observers profit from the fact that a H-Beta-filter can show the dust regions in hydrogen-emitting nebulae quite clearly, similar to a photographical H-Alpha-filter. Larger telescope apertures can even show the split-up into two lines – and the soft phase-out towards the edge.\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 filter is almost as impressive when you are looking at the dust tails of comets. Especially light with shorter wavelengths will be scattered more in the dust tail, so that the contrast to its surroundings increases. Light with even shorter wave-lengths will be scattered even more, but our eye is not so sensitive for these parts of the spectrum. The true dimensions of the sometimes very long dust tail may only be recognizable in the eyepiece with the help of a H-Beta-filter. The H-Beta line is also outside of the prominent lines of the gas tail, so the dust tail can be better deiscerned from the gas tail – and the contrast is increased even more.\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013569867887,"sku":"FHBN-2","price":314.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/baader-h-beta-85nm-ccd-narrowband-filter-2-99a__37995.jpg?v=1766556581"},{"product_id":"set-of-3-f-2-highspeed-filters-h-a-o-iii-s-ii-2","title":"Set of 3 f\/2 Highspeed-Filters (H-a\/O-III\/S-II) 2\"","description":"\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eBaader's New f\/2 Highspeed Narrowband Filters and Filtersets\u003c\/span\u003e\u003cspan style=\"font-size: 12pt; text-align: justify; background-color: rgb(255, 255, 255); font-family: Arial;\"\u003e \u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-size: 12pt; text-align: justify; background-color: rgb(255, 255, 255); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cspan style=\"font-size: 14pt; text-align: justify; background-color: rgb(255, 255, 255); font-family: Arial;\"\u003e(2\" H-alpha \/ O-III \/ S-II) are designed especially for the delicate requirements of extremely fast astrograph optics, such as Hyperstar, RASA, and ultra-fast instruments from TEC\/AP\/ASA\/etc. Conventional narrowband filters cause a heavy loss in transmission due to the strong CWL-shift. In extreme cases the CWL even shifts out of the FWHM (CWL= Center-wavelength \/ FWHM= full width half maximum).\u003c\/span\u003e\u003cbr style=\"font-size: small; text-align: justify; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 14pt;\"\u003e\u003cbr style=\"text-align: justify; background-color: rgb(255, 255, 255); font-size: 14pt;\"\u003e\u003cspan style=\"text-align: justify; background-color: rgb(255, 255, 255);\"\u003eTherefore these filters have a CWL-preshift which matches f\/2 to f\/3 perfectly. Also the FWHM is optimized. In spite of the typical line broadening with such fast optical trains they are able to deliver maximum contrast. For the first time these filters allow the effective use of extremely fast optics for high contrast imaging of emission nebulae. Using these filters between f\/1,8 and f\/3,5 shows a dramatic improvement compared to any regular set of narrowband-filters. \u003c\/span\u003e\u003c\/span\u003e  \u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013574488175,"sku":"FHSS-2","price":1399.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/baader_252520NB_252520f2__59008.1682640493.1280.1280.jpg?v=1766556691"},{"product_id":"optolong-sii-6-5nm-2-filter","title":"Optolong SII 6.5nm 2\" filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632487535,"sku":"O-SII-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Sulfur-II-Narrowband-Telescope-Filter_2__47046.jpg?v=1766558089"},{"product_id":"optolong-oiii-6-5nm-2-filter","title":"Optolong OIII 6.5nm 2\" Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632520303,"sku":"O-OIII-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Oxygen-III-Narrowband-Telescope-Filter_2000x__61873.jpg?v=1766558094"},{"product_id":"optolong-oiii-6-5nm-1-25-filter","title":"Optolong OIII 6.5nm 1.25\" Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632651375,"sku":"O-OIII-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Oxygen-III-Narrowband-Telescope-Filter_2000x__20500.jpg?v=1766558099"},{"product_id":"optolong-oiii-6-5nm-36mm-filter","title":"Optolong OIII 6.5nm 36mm filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634257007,"sku":"O-OIII-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/oiii_36u_2__51982.jpg?v=1766558105"},{"product_id":"optolong-sii-6-5nm-1-25-filter","title":"Optolong SII 6.5nm 1.25\" filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634289775,"sku":"O-SII-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Sulfur-II-Narrowband-Telescope-Filter_2__54156.jpg?v=1766558109"},{"product_id":"optolong-sii-6-5nm-36mm-filter","title":"Optolong SII 6.5nm 36mm Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634420847,"sku":"O-SII-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sii_36u__52005.jpg?v=1766558115"},{"product_id":"optolong-1-25-h-alpha-7nm-filter","title":"OPTOLONG 1.25\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 1.25\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634551919,"sku":"O-HA-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong_2_H-Alpha_7nm_Filter_grande__97416.jpg?v=1766558121"},{"product_id":"optolong-2-h-alpha-7nm-filter","title":"OPTOLONG 2\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 2\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634584687,"sku":"O-HA-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong_2_H-Alpha_7nm_Filter_grande__93602.jpg?v=1766558126"},{"product_id":"optolong-36mm-h-alpha-7nm-filter","title":"OPTOLONG 36mm\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 2\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634715759,"sku":"O-HA-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ha_7nm_filter_1__21063.jpg?v=1766558131"},{"product_id":"baader-o-iii-10nm-visual-nebula-filter","title":"Baader O-III (10nm) Visual Nebula Filter","description":"\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eDelivers the absolute highest contrast views of many diffuse and planetary nebula. For many objects, the Baader O-III reveals a level of intricate detail that rivals the best deep sky photographs. Our favorite filter for the majority of nebula, especially The Veil, Lagoon (M8), Swan (M17), Ring (M57) and Dumbell (M29). With a large scope, you can even view the famous 'Pillars of Creation' in M16 (Eagle).\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe Baader O-III perfectly isolates the two doubly ionized oxygen lines (496 and 501nm), through a very sharp and optimally narrow bandpass (10 nm wide). Unlike other O-III filters, the Baader O-III completely blocks longer and shorter wavelengths (ever wonder why some O-III filters appear RED?, instead of the correct 500 nm Teal color). The result is the highest contrast achievable in an O-III filter.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe O-III benefits from the precision fineoptically polished flat substrate, and advanced DWDM plasma assisted coatings. As a result, the Baader O-III will not degrade image sharpness or impart double images. To prevent deterioration from cleaning or exposure to moisture, some other filters even resort to sandwiching their delicate coatings between two layers of filter glass, resulting in potential blurred or double images. Contrary to myth, nebula filters are often useful at high magnifications, where image quality counts. Baader O-III filters can take high magnifications, and stars retain their pinpoint sharpness, even if the filter is used far ahead of the image plane (ie, for imaging use, or ahead of a star diagonal or binoviewer). Combine with our UV\/IR filter for the ultimate in O-III deep sky imaging.\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013652869231,"sku":"FOIII-1","price":139.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2458395-42-O-N-1_599x599__74097.jpg?v=1766558711"},{"product_id":"baader-6-5nm-f-2-highspeed-filters-cmos-optimized-h-alpha-o-iii-s-11","title":"Baader 6.5nm f\/2 Highspeed Filters – CMOS-optimized (H-alpha, O-III, S-11)","description":"\u003cspan style=\"color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eAfter two hard years of development and significant investment in R\u0026amp;D, the new Baader CMOS optimized (ultra-) narrowband and highspeed filters are imminent. The new range of Baader CMOS Optimized filters, consisting of 84 filters, finally and cost-effectively tackle the problem of filters being accused of creating unbearable halos when put into close vicinity of correcting lenses – in conjunction with latest generation CMOS-chips.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255); color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255); color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003eThis new generation of Baader CMOS-filters features:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; padding-left: 20px; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eIncreased contrast\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eEver more narrow passbands\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II f \/ 2 Highspeed Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for extremely fast optical systems from f \/ 3.4 to f \/ 1.8\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eSpecially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676003439,"sku":"FCSETHS-2","price":999.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961663_highspeed_799x534__52426.jpg?v=1766559306"},{"product_id":"baader-6-5nm-f-2-highspeed-filters-cmos-optimized-h-alpha-o-iii-s-11-1-25","title":"Baader 6.5nm f\/2 Highspeed Filters – CMOS-optimized (H-alpha, O-III, S-11) 1.25\"","description":"\u003cspan style=\"color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eAfter two hard years of development and significant investment in R\u0026amp;D, the new Baader CMOS optimized (ultra-) narrowband and highspeed filters are imminent. The new range of Baader CMOS Optimized filters, consisting of 84 filters, finally and cost-effectively tackle the problem of filters being accused of creating unbearable halos when put into close vicinity of correcting lenses – in conjunction with latest generation CMOS-chips.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255); color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(255, 255, 255); color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003eThis new generation of Baader CMOS-filters features:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; padding-left: 20px; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eIncreased contrast\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eEver more narrow passbands\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II f \/ 2 Highspeed Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for extremely fast optical systems from f \/ 3.4 to f \/ 1.8\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eSpecially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676134511,"sku":"FCSETHS-1","price":619.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961660_highspeed_751x599__46013.jpg?v=1766559312"},{"product_id":"baader-6-5nm-narrowband-filters-cmos-optimized-h-alpha-o-iii-s-11-1-25","title":"Baader 6.5nm Narrowband Filters – CMOS-optimized (H-alpha, O-III, S-11) 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676265583,"sku":"FCSETN-1","price":500.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961650_narrowband_751x599__65621.jpg?v=1766559318"},{"product_id":"baader-6-5nm-hydro-alpha-cmos-optimized-1-25","title":"Baader 6.5nm Hydro Alpha – CMOS-optimized 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676298351,"sku":"FCHALN-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__73533.jpg?v=1766559324"},{"product_id":"baader-6-5nm-oiii-cmos-optimized-1-25","title":"Baader 6.5nm OIII – CMOS-optimized 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676429423,"sku":"FCOIIIN-1","price":199.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__35004.jpg?v=1766559329"},{"product_id":"baader-6-5nm-sii-cmos-optimized-1-25","title":"Baader 6.5nm SII - CMOS-optimized 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676494959,"sku":"FCSIIN-1","price":199.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__56070.jpg?v=1766559334"},{"product_id":"baader-6-5nm-sii-cmos-optimized-2","title":"Baader 6.5nm SII - CMOS-optimized 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676658799,"sku":"FCSIIN-2","price":334.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__80983.jpg?v=1766559339"},{"product_id":"baader-6-5nm-oiii-cmos-optimized-2","title":"Baader 6.5nm OIII - CMOS-optimized 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676789871,"sku":"FCOIIIN-2","price":336.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__15496.jpg?v=1766559344"},{"product_id":"baader-6-5nm-ha-cmos-optimized-2","title":"Baader 6.5nm Ha- CMOS-optimized 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013676822639,"sku":"FCHALN-2","price":300.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_799x534__42335.jpg?v=1766559349"},{"product_id":"36mm-oiii-7nm-filter","title":"36mm OIII 7nm filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013677248623,"sku":"A-OIII-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__85779.jpg?v=1766559375"},{"product_id":"sii-36mm-filter","title":"SII 36mm Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682032751,"sku":"A-SII-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__36276.jpg?v=1766559624"},{"product_id":"ha-1-25-filter","title":"Ha 1.25\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682163823,"sku":"A-Ha-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__10453.jpg?v=1766559631"},{"product_id":"sii-1-25filter","title":"SII 1.25\"Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682327663,"sku":"A-SII-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__95601.jpg?v=1766559642"},{"product_id":"sii-2-filter","title":"SII 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar S II 7nm filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 671.6nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar H-alpha filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 671.6nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar S II filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar S II filter can efficiently reject all the light pollution. You can expect a terrific performance of this S II filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar S II narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: Arial; color: rgb(68, 68, 68);\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: Arial; color: rgb(68, 68, 68);\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Useful for imaging S II emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar S II narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-S II-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013682458735,"sku":"A-SII-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252638__53715.jpg?v=1766559648"},{"product_id":"ha-2-filter","title":"Ha 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683245167,"sku":"A-Ha-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__10009.jpg?v=1766559654"},{"product_id":"ha-36mm-filter","title":"Ha 36mm Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha (Ha) 7nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.3nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe Askar H-alpha filter is designed for further improving the contrast and details of various types of nebulae and supernova remnants, the large emission nebulae in some spiral galaxies, for example. It works well on those nebulae emitting ionized hydrogen or the H II regions in nearby galaxies. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 656.3nm, the Askar H-alpha filter can bring out the most amount of details of the nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar H-alpha filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently blocking other off-band wavelength. That's why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar H-alpha filter can efficiently reject all the light pollution. You can expect a terrific performance of this H-alpha filter in artificially-brighten background sky.\u003c\/p\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003eThe production process is strictly controlled and every single Askar H-alpha narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; font-family: ????, \" microsoft yahei color: rgb\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e· Useful for imaging H-alpha emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei\u003e· The Askar H-alpha narrowband filter is not suitable for visual observation and not designed for imaging or observing the sun or other non-Ha-emitting objects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683376239,"sku":"A-Ha-36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252651__21975.jpg?v=1766559663"},{"product_id":"oiii-7nm-filter-1-25-fitler","title":"OIII 7nm filter 1.25\" Fitler","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683507311,"sku":"A-OIII-1","price":189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__31385.jpg?v=1766559669"},{"product_id":"oiii-7nm-filter-2-filter","title":"OIII 7nm filter 2\" Filter","description":"\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III 7nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.7nm. The 7nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Askar O III filter is designed for improving the contrast and details of some nebulae and supernova remnants. It works well on those nebulae emitting O III. Featuring 7nm narrow bandwidth and a greatly high transmission at a center wavelength of 500.7nm, the Askar O III filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants. Also, the out-of-band blocking ability is rated with OD4 (0.01%) with the blocking range of 200-1050nm. It delivers an excellent signal-to-noise ratio and a sharp cut-off rate to attenuate the disturbance from other wavelengths.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrow bandwidth and an effective cut-off rate are important indices when choosing a narrowband filter. The Askar O III filter has a narrow bandwidth of 7nm and an extreme transmission of 90% at the peak, in the meanwhile, sufficiently suppressing other off-band wavelength. That’s why we sometimes call those 7nm-bandwidth, or even a smaller bandwidth of 3nm, a line filter. So the Askar O III filter can efficiently reject all the light pollution. You can expect a terrific performance of this O III filter in artificially-brighten background sky.\u003c\/span\u003e\u003c\/p\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003c\/span\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe production process is strictly controlled and every single Askar O III narrowband filter is individually examined and tested to ensure that they can highly satisfy the observing interests and needs of our customers.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-weight: bold; color: rgb(68, 68, 68); font-family: Arial;\"\u003eApplication\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Narrow 7mn bandwidth, properly designed for astrophotography both in light polluted or dark locations.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-size: 14px; font-family: Arial;\"\u003e· Useful for imaging O III emitting nebulae, planetary nebulae and supernova remnants.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· High transmission of 90% and excellent cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; color: rgb(68, 68, 68); font-family: Arial;\"\u003e· The Askar O III narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun or other non-O III-emitting objects.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013683540079,"sku":"A-OIII-2","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1612252698__08164.jpg?v=1766559675"},{"product_id":"baader-6-5nm-narrowband-filters-cmos-optimized-h-alpha-o-iii-s-11-36mm","title":"Baader 6.5nm Narrowband Filters – CMOS-optimized (H-alpha, O-III, S-11) 36mm","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013686718575,"sku":"FCSETN-RD36","price":684.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961652_narrowband_800x544__51188.jpg?v=1766559736"},{"product_id":"baader-6-5nm-hydro-alpha-cmos-optimized-36mm","title":"Baader 6.5nm Hydro Alpha – CMOS-optimized 36mm","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha Narrowband Filter - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013686849647,"sku":"FCHALN-RD36","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961102_416x608__79689.jpg?v=1766559742"},{"product_id":"baader-6-5nm-oiii-cmos-optimized-36mm","title":"Baader 6.5nm OIII – CMOS-optimized 36mm","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader O-III Narrowband Filter - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013686915183,"sku":"FCOIIIN-RD36","price":239.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961177_416x608__60942.jpg?v=1766559747"},{"product_id":"baader-6-5nm-sii-cmos-optimized-36mm","title":"Baader 6.5nm SII - CMOS-optimized 36mm","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013687046255,"sku":"FCSIIN-RD36","price":244.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961252_416x608__69502.jpg?v=1766559754"},{"product_id":"baader-6-5nm-narrowband-filters-cmos-optimized-h-alpha-o-iii-s-11-2","title":"Baader 6.5nm Narrowband Filters – CMOS-optimized (H-alpha, O-III, S-11) 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); 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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBaader H-alpha \/ O-III \/ S-II Narrowband Filter Set - Precision Grade\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e6.5 nm FWHM, recommended for optical systems from f \/ 10 to f \/ 3.5\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\n\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eReflex-Blocker ™ hard coated and planoptically polished - with sealed coating edges (\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eLife-Coat ™\u003c\/span\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e \u003c\/span\u003e)\u003c\/span\u003e\n\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim\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 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eOptimized for modern CMOS cameras, but excellent for CCD camera technologies\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: 1rem; margin-bottom: 1rem; color: rgb(76, 81, 84); font-family: \" libre franklin sans-serif font-size:=\"\"\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 1rem; margin-bottom: 0px; color: rgb(76, 81, 84); 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;\"\u003eCMOS-Optimized Baader Filter\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;\"\u003eIncreased contrast\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;\"\u003eEver more narrow passbands\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;\"\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\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;\"\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\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;\"\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\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;\"\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\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;\"\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\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;\"\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013687505007,"sku":"FCSETN-2","price":934.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2961653_narrowband_800x544__08468.jpg?v=1766559770"},{"product_id":"antlia-3nm-narrowband-oxygen-iii-oiii-pro-filter-1-25-mounted","title":"Antlia 3nm Narrowband Oxygen III (OIII) Pro Filter - 1.25'' Mounted","description":"\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eAntlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cins cite=\"mailto:Ted%20Dobosz\" datetime=\"2021-01-06T13:06\" style=\"text-size-adjust: 100%;\"\u003e\u003c\/ins\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003ebandpass\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eAs the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eOIII\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e 3nm Pro filter\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eare\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e designed to deliver \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e We guarantee T\u0026gt;\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eB\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003elue\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eloss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e5\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e (0.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e00\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eSNR(\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003esignal to noise ratio\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e and effective cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eImproved sharp cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eApplication and Performance:\u003c\/span\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eHigh transmittance and smallest bandwidth\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e to maximize\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003econtrast\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eNarrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eExtend\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eimaging time when the moon is up\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eAntlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003edown \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eto F\/3\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e systems\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003ewith slight loss of signal\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eAll A\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003entlia\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e Narrowband filters are edge blackened to \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eeliminate internal reflections\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSuperior optical reliability reduces \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003epost image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eThis filter is not suited to deep sky objects that do not contain OIII emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eDO NOT LOOK AT THE SUN WITH \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eANTLIA\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eFILTER\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eS\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSerious eye damage will result if you\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003efail to observe the warning.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e3nm Pro \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003efilter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia Filters","offers":[{"title":"Default Title","offer_id":44013692256367,"sku":"ANT-OIII-1","price":384.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OIII_252520125__91669.1682635786.1280.1280.jpg?v=1766559897"},{"product_id":"antlia-3nm-narrowband-oxygen-iii-oiii-pro-filter-36mm","title":"Antlia 3nm Narrowband Oxygen III (OIII) Pro Filter - 36mm","description":"\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eAntlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cins cite=\"mailto:Ted%20Dobosz\" datetime=\"2021-01-06T13:06\" style=\"text-size-adjust: 100%;\"\u003e\u003c\/ins\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003ebandpass\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eAs the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eOIII\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e 3nm Pro filter\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eare\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e designed to deliver \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e We guarantee T\u0026gt;\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eB\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003elue\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eloss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e5\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e (0.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e00\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eSNR(\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003esignal to noise ratio\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e and effective cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eImproved sharp cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eApplication and Performance:\u003c\/span\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eHigh transmittance and smallest bandwidth\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e to maximize\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003econtrast\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eNarrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eExtend\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eimaging time when the moon is up\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eAntlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003edown \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eto F\/3\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e systems\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003ewith slight loss of signal\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eAll A\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003entlia\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e Narrowband filters are edge blackened to \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eeliminate internal reflections\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSuperior optical reliability reduces \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003epost image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eThis filter is not suited to deep sky objects that do not contain OIII emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eDO NOT LOOK AT THE SUN WITH \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eANTLIA\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eFILTER\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eS\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSerious eye damage will result if you\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003efail to observe the warning.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e3nm Pro \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003efilter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia Filters","offers":[{"title":"Default Title","offer_id":44013692584047,"sku":"ANT-OIII-36","price":459.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OIII_25252036__31234.1682635787.1280.1280.jpg?v=1766559904"},{"product_id":"antlia-3nm-narrowband-oxygen-iii-oiii-pro-filter-2","title":"Antlia 3nm Narrowband Oxygen III (OIII) Pro Filter - 2\"","description":"\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eAntlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cins cite=\"mailto:Ted%20Dobosz\" datetime=\"2021-01-06T13:06\" style=\"text-size-adjust: 100%;\"\u003e\u003c\/ins\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003ebandpass\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eAs the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eOIII\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e 3nm Pro filter\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eare\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e designed to deliver \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e We guarantee T\u0026gt;\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e85\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eB\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003elue\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eloss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e5\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e (0.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e00\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eSNR(\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003esignal to noise ratio\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e and effective cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eImproved sharp cut\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eoff astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eApplication and Performance:\u003c\/span\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eHigh transmittance and smallest bandwidth\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e to maximize\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003econtrast\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eNarrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eExtend\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eimaging time when the moon is up\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eAntlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003edown \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eto F\/3\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e systems\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003ewith slight loss of signal\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eAll A\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003entlia\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e Narrowband filters are edge blackened to \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eeliminate internal reflections\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSuperior optical reliability reduces \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003epost image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eThis filter is not suited to deep sky objects that do not contain OIII emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eDO NOT LOOK AT THE SUN WITH \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eANTLIA\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eFILTER\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eS\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSerious eye damage will result if you\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003efail to observe the warning.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e3nm Pro \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003efilter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia Filters","offers":[{"title":"Default Title","offer_id":44013692616815,"sku":"ANT-OIII-2","price":599.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OIII_252520125__23190.1682635787.1280.1280.jpg?v=1766559909"},{"product_id":"antlia-3nm-narrowband-h-alpha-ha-pro-filter-1-25","title":"Antlia 3nm Narrowband H-alpha (Ha) Pro Filter - 1.25''","description":"\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eAntlia H-alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e bandpass\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eAs the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e 3nm Pro filter\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eare\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e designed to deliver 88\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e% transmission at the 656.3nm line which provides you with the maximum signal and well defined nebulae structures.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;88% within 1nm range of the center bandwidth,\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003ewhich means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eB\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003elue\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e-\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eand meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e5\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e (0.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e00\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eSNR(\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003esignal to noise ratio\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e)\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e and effective cut-off rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eImproved \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eharp cut-off astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eApplication and Performance:\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eHigh transmittance and smallest bandwidth \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eto maximize \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003econtrast\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eNarrowband Objects: H-alpha Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eUse in light polluted areas and\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003edark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eExtend\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003es\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eimaging time when the moon is up\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eAntlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003edown \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eto F\/3\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e systems\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; line-height: 14.82px; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003ewith slight loss of signal\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eAll A\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003entlia\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e Narrowband filters are edge blackened to \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eeliminate internal reflections\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eSuperior optical reliability reduces \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003epost image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 0px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003eThis filter is not suited to deep sky objects that do not contain \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; line-height: 14.82px; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; line-height: 14.82px; font-size: 13px;\"\u003e emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 7px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 15px;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eDO NOT LOOK AT THE SUN WITH \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eANTLIA\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e \u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003eFILTER\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eS\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eSerious eye damage will result if you\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: ??; font-size: 13px;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial;\"\u003efail to observe the warning.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e\u003cbr style=\"text-size-adjust: 100%;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e3nm Pro \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003efilter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the \u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003eH-alpha\u003c\/span\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003e signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"text-size-adjust: 100%; margin: 0px 28px 13px 0px; font-family: ????; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-family: Arial; font-size: 13px;\"\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia Filters","offers":[{"title":"Default Title","offer_id":44013692747887,"sku":"ANT-Ha-1","price":344.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Ha__51664.jpg?v=1766559915"}],"url":"https:\/\/ontariotelescope.com\/collections\/narrowband-filters.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}