{"title":"Filters","description":"\u003cp\u003eBrowse our Filters collection. Best Price.\u003c\/p\u003e","products":[{"product_id":"zwo-atmospheric-dispersion-corrector-adc","title":"ZWO Atmospheric Dispersion Corrector (ADC)","description":"\u003ch1\u003eZWO Atmospheric Dispersion Corrector\u003c\/h1\u003e\n\u003cp\u003eZWO Atmospheric Dispersion Corrector (ADC) is used to reduce the effect of atmospheric dispersion on lunar and planetary images. It can be used for imaging and for observation. \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/305bbd5784cd9b206041ffab39b9d596.webp?v=1752870930\u0026amp;width=700\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ae159e88565de355077fcd72735d8afa.webp?v=1752870930\u0026amp;width=700\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/e88c4f041374cd093e8e0f6b95dacc5e.webp?v=1752870930\u0026amp;width=700\" alt=\"\"\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eWhy you would use a ZWO Atmospheric Dispersion Corrector ?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eLight from any star or planet that enters our atmosphere at an angle will suffer refraction effects. It bend to light to a slightly steeper angle. This refraction effect makes the object appear higher in the sky than if the atmosphere wasn’t there. The degree of refraction depends to a small degree on various things. Like temperature, humidity, observers and height above sea level. It does increases strongly with decreasing altitude of the object. For example, the image of the sun at sunset can actually be elevated by over 0.5°, which is slightly more than one solar diameter.\u003c\/p\u003e\n\u003cp\u003eLike most optical media the refractive (bending) power of the atmosphere is actually dependent on the wavelength of light. This is called optical dispersion. Atmospheric dispersion corrector means that actually the degree of ‘lift’ that the refraction causes depends not only on the angle of the light, but also the colour of that light. Atmospheric dispersion spreads the light from any point source into a vertical spectrum of colours whose length increases the lower the object is in the sky.\u003c\/p\u003e\n\u003cp\u003eThe schematic below illustrates this dispersion effect as light enters the atmosphere and also the lifted elevation of the image. The lift is wavelength dependent and hence the image is separated into different colours. A planet exhibiting bad atmospheric dispersion effects will have a blue fringe on the top edge and a red fringe on the bottom edge.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eYou can read in much more detail in this excellent article by Martin Lewis: http:\/\/skyinspector.co.uk\/atm-dispersion-corrector–adc\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrism Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eH-K9L(Schott BK7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrism Surface Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eλ\/10@632.8nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrism Deviation Angler\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAR Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Camera\/Eyepiece Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Telescope Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eADC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eZWO 2-Years Warranty\u003c\/p\u003e\n\u003cp\u003eZWO General Product \u0026amp; Software Manuals\u003c\/p\u003e\n\u003cp\u003eZWO ADC Quick Guide\u003c\/p\u003e\n\u003cp\u003eZWO ADC Manual\u003c\/p\u003e\n\u003cp\u003eZWO How to Clean the Prism of the ADC\u003c\/p\u003e\n\u003cp\u003eZWO Atmospheric Dispersion Corrector (ADC) Transmission curve\u003c\/p\u003e\n\u003cp\u003eZWO Atmospheric Dispersion Corrector (ADC) Mechanical Drawing\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44958383636573,"sku":"xxr1787936985710","price":116.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2684\/0669\/files\/zwo-atmospheric-dispersion-corrector-adc_1.jpg?v=1787936990"},{"product_id":"celestron-2-oxygen-iii-narrowband-filter-93624","title":"Celestron 2\" Oxygen III Narrowband Filter (93624)","description":"\u003ch1\u003eCelestron 2\" Oxygen III Narrowband Filter\u003c\/h1\u003e\n\u003cp\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.\u003cbr\u003e\u003cbr\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 2\" OIII narrowband filter isolates the two doubly-ionized oxygen lines (496 and 501 nm lines)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFilter has ultra-hard, vacuum-deposited coating\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEliminates un-natural colored halos surrounding bright stars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron 2\" Oxygen III Narrowband Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44958383898717,"sku":"rqy1787936992673","price":51.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2684\/0669\/files\/celestron-2-oxygen-iii-narrowband-filter-93624_1.jpg?v=1787937020"},{"product_id":"celestron-125-moon-filter-94119-a","title":"Celestron 1.25\" Moon Filter (94119-A)","description":"\u003ch2\u003eCelestron 1.25\" Moon Filter\u003c\/h2\u003e\n\u003cp\u003eThe Moon has the distinction of being the most often viewed celestial object through backyard telescopes. It is undoubtedly beautiful and mysterious, and is one of those constants in our lives that connects us to every other being on our planet. Regardless of who we are or where we live or travel, we all look at the same moon.\u003cbr\u003e\u003cbr\u003eIt is difficult to look at the Moon through a telescope and see all of the details due to its brightness. Our eyes are not ready for the bright beam of light that emits from the eyepiece, and they “stop down”, just as they would when you step out into the sunlight on a bright summer’s day. When we’re in the sunlight, we often wear sunglasses. They help us relax our eyes, protect us from glare, and help us see things more clearly. When amateur astronomers observe the Moon, we use a moon filter. A Celestron Moon Filter provides similar benefits to those of sunglasses...our eye relaxes and opens up to let us see more detail. This is especially important when observing the Moon when it is near full.\u003cbr\u003e\u003cbr\u003eThe Celestron Moon Filter simply screws onto the insert barrel of most 1.25” eyepieces. It only takes a second or two to transform your regular eyepiece into one suited for lunar observations. A Moon Filter is also helpful when observing Venus or bright terrestrial scenes. This filter is not suitable for viewing the Sun.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron 1.25\" Moon Filter\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44958383931485,"sku":"bup1787937018256","price":9.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2684\/0669\/files\/celestron-125-moon-filter-94119-a_1.png?v=1787937024"}],"url":"https:\/\/www.cedarstorehouse.shop\/collections\/filters.oembed","provider":"My Store","version":"1.0","type":"link"}