{"title":"Observing Filters","description":null,"products":[{"product_id":"eyepiece-and-filter-kit-125in","title":"Eyepiece and Filter Kit - 1.25\"","description":"\u003cp\u003eThe Celestron 1.25” Eyepiece and Filter Kit is a great way to expand the functionality and enjoyment of your telescope. Inside the metal, foam-lined carry case you’ll find these accessories:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32mm Plossl Eyepiece - 1.25”\u003c\/li\u003e\n\u003cli\u003e17mm Plossl Eyepiece - 1.25”\u003c\/li\u003e\n\u003cli\u003e13mm Plossl Eyepiece - 1.25”\u003c\/li\u003e\n\u003cli\u003e8mm Plossl Eyepiece - 1.25”\u003c\/li\u003e\n\u003cli\u003e6mm Plossl Eyepiece - 1.25”\u003c\/li\u003e\n\u003cli\u003e2X Barlow Lens - 1.25”\u003c\/li\u003e\n\u003cli\u003e#80A Blue Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003e#58 Green Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003e#56 Light Green Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003e#25 Red Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003e#21 Orange Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003e#12 Yellow Filter - 1.25”\u003c\/li\u003e\n\u003cli\u003eMoon Filter - 1.25”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEyepieces\u003c\/em\u003e - All five Plossl eyepieces can be used in any telescope with a 1.25” focuser. Each eyepiece features a four-element design with a 52º apparent field of view. The optics are fully multi-coated to improve light transmission and protect the optics. The 32mm Plossl eyepiece offers a low power, wide field view in most telescopes, the 13mm \u0026amp; 17mm focal lengths are good medium-power oculars, and the 8mm \u0026amp; 6mm eyepieces provide high magnifications, great for the Moon and planets, especially when seeing conditions are good.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e2X Barlow Lens\u003c\/em\u003e - The included, and very versatile 2X Barlow doubles the magnification of any 1.25” eyepiece. Since this kit includes five (5) eyepieces, you will be able to use them with and without the Barlow, giving you a total of ten magnification options in all. Any other 1.25” eyepieces you already have will also work in this desirable accessory, giving you even more magnification choices. Remember, high magnifications do not always produce clear, sharp results, especially on evenings of poor or moderate seeing conditions. Experiment to find the magnifications that are best for your telescope on a particular night.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eFilters\u003c\/em\u003e - Colored filters can be used to bring out certain details on a planet’s surface or its cloud structure. All of the planetary filters included in the 1.25” Eyepiece \u0026amp; Accessory Kit, as well as the Moon filter, can be used on any 1.25” eyepiece with the proper filter threads, so they are very versatile. Just screw one onto your eyepiece of choice and slide it into the focuser.\u003c\/p\u003e\n\u003cp\u003eThe Moon filter is one of the first accessories most new amateur astronomers buy, and for good reason! It helps block out a portion of the light the Moon sends into your eyepiece so that you can see details better. You can also try this filter on Venus; it blocks enough glare so you can observe the planet’s phases more easily.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eMetal Case\u003c\/em\u003e: The sturdy metal carry case has die-cut foam inside to protect and cushion your accessories. Store each one in its appointed place when not in use and you’ll keep them looking and performing like new. The case is even large enough to carry a few extra accessories. Just pull out enough of the foam cubes to make a nest for your eyepiece, camera adapter, etc. A tight fit is better, so remove the least amount of foam possible before testing the fit. You can always remove more if you need to.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826629385,"sku":"94303","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94303_eyepiece_and_filter_kit_1.jpg?v=1585158028"},{"product_id":"eyepiece-and-filter-kit-2in","title":"Eyepiece and Filter Kit - 2\"","description":"\u003cp\u003eGet more light to your eye and enjoy the low power, wide field views of 2” eyepieces with the Celestron 2” Eyepiece \u0026amp; Filter Kit. It’s a great way to expand the functionality and enjoyment of your telescope. As long as you have a Schmidt-Cassegrain or a refractor that sports a 2” focuser, you’re good to go. Newtonian owners can use everything except the 2” Mirror Diagonal (unnecessary with a Newtonian reflector), as long as the focuser accepts 2” accessories.\u003c\/p\u003e\n\u003cp\u003eInside the metal, foam-lined carry case you’ll find these accessories:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90º Mirror Diagonal - 2” to SCT\u003c\/li\u003e\n\u003cli\u003eDiagonal Adapter for Refractors - 2”\u003c\/li\u003e\n\u003cli\u003e26mm E-lux Eyepiece - 2”\u003c\/li\u003e\n\u003cli\u003e32mm E-lux Eyepiece - 2”\u003c\/li\u003e\n\u003cli\u003e40mm E-lux Eyepiece - 2”\u003c\/li\u003e\n\u003cli\u003e2X Barlow Lens - 2”\u003c\/li\u003e\n\u003cli\u003e#80A Blue Filter - 2”\u003c\/li\u003e\n\u003cli\u003e#58 Green Filter - 2”\u003c\/li\u003e\n\u003cli\u003e#25 Red Filter - 2”\u003c\/li\u003e\n\u003cli\u003e#21 Orange Filter - 2”\u003c\/li\u003e\n\u003cli\u003e#12 Deep Yellow Filter - 2”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEyepieces\u003c\/em\u003e - All three Celestron E-lux eyepieces can be used in any telescope with a 2” focuser. Each eyepiece features a three-element design with a 56º apparent field of view (40mm has a 50º field of view). The optics are fully multi-coated to improve light transmission and protect the optics. The 40mm E-lux eyepiece offers the lowest power option, for those times when you need all the light-gathering your telescope can offer to see faint deep-sky objects. The 26mm \u0026amp; 32mm focal lengths provide a bit more magnification. Experiment on your favorite objects to see which you like best.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e2X Barlow Lens\u003c\/em\u003e - The included, and very versatile 2X Barlow doubles the magnification of any 2” eyepiece, or, you can drop in a 2” to 1.25” adapter (not included), and use your 1.25” eyepieces in it as well. Since this kit includes three 2” eyepieces, you will be able to use them with and without the Barlow, giving you a total of six magnification options in all. Get the benefit of a 2” barrel with the magnification normally reserved for 1.25” eyepieces. The 40 mm will magnify like a 20 mm, the 32 mm like a 16 mm, and the 26 mm will do the work of a 13 mm.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eFilters\u003c\/em\u003e - Colored filters bring out details on a planet’s surface or its cloud structure. All of the planetary filters included in the Eyepiece \u0026amp; Accessory Kit can be used on any 2” eyepiece or accessory with the proper filter threads, so they are very versatile. Just screw one onto your eyepiece of choice and slide it into the focuser.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eMetal Case\u003c\/em\u003e: The sturdy metal carry case has die-cut foam inside to protect and cushion your accessories. Keep each one in its appointed place when not in use and you’ll keep them looking and performing like new.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826629513,"sku":"94305","price":419.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94305_eyepiece_and_filter_kit_2_inch_02.jpg?v=1590984297"},{"product_id":"oxygen-iii-narrowband-filter-125in","title":"Oxygen III Narrowband Filter - 1.25\"","description":"\u003cp\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.\u003c\/p\u003e\n\u003cp\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\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826633609,"sku":"93623","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/93623-Narrow_Band_Filter_01.jpg?v=1590984306"},{"product_id":"oxygen-iii-narrowband-filter-2in","title":"Oxygen III Narrowband Filter - 2\"","description":"\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.\u003c\/p\u003e\n\u003cp\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\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826633673,"sku":"93624","price":124.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/93624_oxygeniiinarrow_large_1.jpg?v=1590984307"},{"product_id":"lunar-and-planetary-filter-set-125in","title":"Lunar and Planetary Filter Set - 1.25\"","description":"\u003cp\u003eColored filters can be used to bring out details on a planet’s surface or its cloud structure. All of the planetary filters included in the Celestron Lunar and Planetary Filter Set can be used on any 1.25” eyepiece with the proper filter threads, so they are very versatile. Just screw one onto the eyepiece of choice and slide it into the focuser.\u003c\/p\u003e\n\u003cp\u003eThis Celestron filter set includes the following colors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e12 Deep Yellow - A good general purpose filter for smaller aperture telescopes (less than 4.5”), the #12 Yellow will improve the contrast of features on the Moon. It will also help you see the equatorial belts on Jupiter and Saturn, clouds and the polar ice caps on Mars, and the dusky detail on Uranus and Neptune.\u003c\/li\u003e\n\u003cli\u003e21 Orange - Sharpens the boundaries along the plains of Mars due to the reduction of blue\/green transmissions. Use on Jupiter and Saturn to enhance detail in the belts and polar regions.\u003c\/li\u003e\n\u003cli\u003e80A Blue - Enhances the contrast of the cloud belts on Jupiter and the polar ice caps on Saturn. It also can be used to increase contrast on the Moon if you don’t mind the color shift.\u003c\/li\u003e\n\u003cli\u003eND-96-0.3 Neutral Density - A great filter for the Moon, and for stacking with other planetary filters to increase density without changing the color. A neutral density filter is also useful when splitting binary star systems (double stars). Use anytime you want to decrease brightness but don’t want to affect the color characteristics of an object.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach Celestron 1.25” filter has 26mm of clear aperture, and is mounted in a black anodized aluminum cell that is threaded on both sides. Double threads allow the user to stack different filters together to create a custom color or affect the transmission percentage. Special coatings on each filter protect against reflections, ghosting, and scratches. A plastic case is included to keep your filters safe when not in use.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826634313,"sku":"94119-10","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94119-10_Color_Filter-Kit_1-25_01.jpg?v=1590984308"},{"product_id":"moon-filter-125in","title":"Moon Filter - 1.25\"","description":"\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.\u003c\/p\u003e\n\u003cp\u003eIt is difficult to look at the Moon through a telescope and see all of the details due to its brightness. Our eyes are not ready for the bright beam of light that emits from the eyepiece, and they “stop down”, just as they would when you step out into the sunlight on a bright summer’s day. When we’re in the sunlight, we often wear sunglasses. They help us relax our eyes, protect us from glare, and help us see things more clearly. When amateur astronomers observe the Moon, we use a moon filter. A Celestron Moon Filter provides similar benefits to those of sunglasses...our eye relaxes and opens up to let us see more detail. This is especially important when observing the Moon when it is near full.\u003c\/p\u003e\n\u003cp\u003eThe Celestron Moon Filter simply screws onto the insert barrel of most 1.25” eyepieces. It only takes a second or two to transform your regular eyepiece into one suited for lunar observations. A Moon Filter is also helpful when observing Venus or bright terrestrial scenes. This filter is not suitable for viewing the Sun.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826634505,"sku":"94119-A","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94119-A_Moon_Filter_1-25_01.jpg?v=1603736971"},{"product_id":"uhclpr-filter-125in","title":"UHC\/LPR Filter - 1.25\"","description":"\u003cp\u003eOur 1-1\/4\" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes 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. sky glow).\u003c\/p\u003e\n\u003cp\u003eThe ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire bandpass, with total blockage of prominent light pollution lines. The perfect filter for viewing nebula from light polluted skies, or for boosting the contrast of nebula from dark sky sites.\u003c\/p\u003e\n\u003cp\u003eIn addition to it's optimum spectral and optical characteristics, the UHC\/LPR filter offers important features that set it apart and result in the highest quality celestial views:\u003c\/p\u003e\n\u003cp\u003eThe multi-layer dielectric coatings are plasma assisted and Ionbeam hardened using the latest technology for durability and resistance to scratching.\u003c\/p\u003e\n\u003cp\u003eImproved transmission translates to maximum image brightness and contrast. Users of smaller, 4\"-11\" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact.\u003c\/p\u003e\n\u003cp\u003eThe high transmission, sharp cutoffs, and more moderate 60nm passband of the UHC\/LPR filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader bandpass and inclusion of an extremely efficient H-Alpha passband (656nm).\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826634633,"sku":"94123","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/24123-125-inch-filter_01.jpg?v=1590984309"},{"product_id":"uhclpr-filter-2in","title":"UHC\/LPR Filter - 2\"","description":"\u003cp\u003eOur 2\" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes 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. sky glow).\u003c\/p\u003e\n\u003cp\u003eThe ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire bandpass, with total blockage of prominent light pollution lines. The perfect filter for viewing nebula from light polluted skies, or for boosting the contrast of nebula from dark sky sites.\u003c\/p\u003e\n\u003cp\u003eIn addition to it's optimum spectral and optical characteristics, the UHC\/LPR filter offers important features that set it apart and result in the highest quality celestial views:\u003c\/p\u003e\n\u003cp\u003eThe multi-layer dielectric coatings are plasma assisted and Ionbeam hardened using the latest technology for durability and resistance to scratching.\u003c\/p\u003e\n\u003cp\u003eImproved transmission translates to maximum image brightness and contrast. Users of smaller, 4\"-11\" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact.\u003c\/p\u003e\n\u003cp\u003eThe high transmission, sharp cutoffs, and more moderate 60nm passband of the UHC\/LPR filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader bandpass and inclusion of an extremely efficient H-Alpha passband (656nm).\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826635913,"sku":"94124","price":124.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94124_2-inch_filter_01.jpg?v=1590984310"},{"product_id":"used-eyepiece-and-filter-kit-1-25","title":"Used - Eyepiece and Filter Kit - 1.25\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":45091755131055,"sku":"U94303","price":184.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94303_eyepiece_and_filter_kit_1.jpg?v=1585158028"},{"product_id":"used-eyepiece-and-filter-kit-2","title":"Used - Eyepiece and Filter Kit - 2\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":45091755884719,"sku":"U94305","price":329.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94305_eyepiece_and_filter_kit_2_inch_02.jpg?v=1590984297"},{"product_id":"used-uhc-lpr-filter-1-25","title":"Used - UHC\/LPR Filter - 1.25\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":45929026486447,"sku":"U94123","price":69.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/24123-125-inch-filter_01.jpg?v=1590984309"},{"product_id":"used-lunar-and-planetary-filter-set-1-25","title":"Used - Lunar and Planetary Filter Set - 1.25\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":46555058864303,"sku":"55941191055","price":39.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94119-10_Color_Filter-Kit_1-25_01.jpg?v=1590984308"},{"product_id":"used-lunar-and-planetary-filter-set-1-26","title":"Used - Lunar and Planetary Filter Set - 1.25\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":46686552817839,"sku":"U94119-10","price":36.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94119-10_Color_Filter-Kit_1-25_01.jpg?v=1590984308"},{"product_id":"used-moon-filter-1-25","title":"Used - Moon Filter - 1.25\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":46688443695279,"sku":"U94119-A","price":7.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94119-A_Moon_Filter_1-25_01.jpg?v=1603736971"},{"product_id":"used-uhc-lpr-filter-2","title":"Used - UHC\/LPR Filter - 2\"","description":"","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47080963244207,"sku":"U94124","price":89.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/94124_2-inch_filter_01.jpg?v=1590984310"}],"url":"https:\/\/www.celestron.com\/collections\/observing-filters.oembed","provider":"Celestron","version":"1.0","type":"link"}