{"title":"Imaging Filters","description":null,"products":[{"product_id":"lrgb-imaging-filter-set-125in","title":"LRGB Imaging Filter Set - 1.25\"","description":"\u003cp\u003eTake color images of the night sky with your Skyris monochrome CCD camera, a simple filter wheel, and this four-piece LRGB filter set! These imaging filters were designed in our facility in California with a spectrum bandpass that produced optimum color balance and sharpness.\u003c\/p\u003e\n\u003cp\u003eEach 1.25” mounted filter has a clear aperture of 26 mm, and is layered with dichroic coatings that allow transmission of more than 92% of the visual spectrum (420 nm - 680 nm) while blocking infrared (IR) transmissions that would cause slightly out-of-focus images were they left unblocked. Anti-reflection coatings are also applied in multiple layers to further increase contrast and light throughput, and to protect the filter from the effects of daily use.\u003c\/p\u003e\n\u003cp\u003eThe Celestron LRGB Filter Set includes a luminance (L), red (R), green (G), and blue (B) filter. Since they are mounted in a standard 1.25” cell, these filters can be used with a wide variety of cameras, including the Celestron Skyris and The Imaging Source astronomy cameras.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/SpectrumTransmission_Final_large.jpg?v=1507067606\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826597641,"sku":"95517","price":89.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/lrgb.jpg?v=1574120348"},{"product_id":"light-pollution-imaging-filter-rowe-ackermann-schmidt-astrograph-rasa-11","title":"Light Pollution Imaging Filter, Rowe-Ackermann Schmidt Astrograph (RASA) 11","description":"\u003cp\u003eGet the most out of your Celestron Rowe-Ackermann Schmidt Astrograph 11, even under light-polluted skies, with this Light Pollution Imaging Filter, custom-designed for the RASA. No matter which camera you use, this filter’s generous 68 mm clear aperture allows it to easily accommodate today’s largest sensors. Utilizing a machined aluminum housing and Schott B270 glass, the filter replaces the RASA’s clear optical window so the RASA’s optical performance is unaltered. \u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eRemove Light Pollution While Keeping Your Images Bright\u003c\/strong\u003e\u003cbr\u003e Light pollution limits how much of the night sky we can see and photograph. When imaging with a color camera in light polluted areas, skyglow degrades image quality. Light pollution filters help to selectively block light emitted from common streetlights and other ambient lighting. But most light pollution filters greatly compromise the total light throughput, causing dim images, and negatively impact the color balance, causing images to appear too green or blue.\u003cbr\u003e \u003cbr\u003e The Light Pollution Imaging Filter for RASA “surgically” removes unwanted light pollution while preserving as much of the useful spectrum as possible. That means you’ll still retain over 90 percent of the light captured by your telescope at many wavelengths.\u003cbr\u003e \u003cbr\u003e Unlike other light pollution suppression filters, the Celestron LP Imaging Filter for RASA maintains a relatively neutral color balance so you can bring out subtle color in galaxies and other faint deep sky objects. Multiple layers of specially-formulated dielectric coatings provide the desired transmission, while anti-reflective coatings minimize star halos and internal reflections.\u003c\/p\u003e\n\u003cp\u003eAlso included is a clear plastic case to protect the filter when not in use\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003eIndividually Tested for Quality\u003cbr\u003e \u003c\/strong\u003eEvery Celestron Light Pollution Imaging Filter is tested individually for light transmission. Inside the box, you’ll receive a graph detailing the actual transmission spectrum for your specific filter.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":39826597769,"sku":"93617","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/93617_LPIF_Front.jpg?v=1590984232"},{"product_id":"light-pollution-imaging-filter-rowe-ackermann-schmidt-astrograph-rasa-8","title":"Light Pollution Imaging Filter, Rowe-Ackermann Schmidt Astrograph (RASA) 8","description":"\u003cp\u003eLight pollution in the night sky can significantly degrade contrast in astronomical images. This is especially true when using very fast telescopes like the 8” RASA because the sky background saturates very quickly. The “noise” of the light pollution overwhelms the “signal” from the celestial object you are imaging, making it difficult to get the most detailed image. The Light Pollution Imaging Filter for the 8” RASA remedies this by blocking light pollution while transmitting light from deep-sky objects. The result is bright, detailed objects that pop off the black sky background with superior contrast.\u003c\/p\u003e\n\u003cp\u003eFortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these wavelengths, the filter greatly reduces the effects of light pollution without degrading overall image quality.\u003c\/p\u003e\n\u003cp\u003eThe Light Pollution Imaging (LPI) Filter for the 8” RASA blocks light from some of the most common sources of light pollution between 400-700nm (i.e., the visible spectrum), including high- and low-pressure sodium-vapor streetlights, mercury-vapor streetlights, and natural airglow caused by oxygen in the atmosphere. Unlike some light pollution filters, the LPI filter blocks only specific areas of the spectrum instead of wide regions. This helps to maintain image brightness and color balance. In addition, specific wavelengths associated with emission nebulae, such as H-α(656nm), H-β (486nm), OIII (496nm and 501nm), and SII (672nm), are highly transmitted, ensuring minimal loss of image brightness for those objects.\u003c\/p\u003e\n\u003cp\u003eThe filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained.\u003c\/p\u003e\n\u003cp\u003eEach filter comes with a plastic storage case to safely store the filter or the placeholder glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":12593976016981,"sku":"93614","price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/93614_Light_Polution_Filter_RASA_8_01.jpg?v=1584998407"},{"product_id":"h-alpha-h-beta-oiii-imaging-filter-rowe-ackermann-schmidt-astrograph-rasa-8","title":"H-alpha H-beta OIII Imaging Filter, Rowe-Ackermann Schmidt Astrograph (RASA) 8","description":"\u003cp\u003eBring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA. This specialized filter allows high transmission of light from emission nebulae while blocking light pollution, helping to make your images pop with detail off the black sky background with superior contrast.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these “bad” wavelengths, the filter essentially eliminates the effect of light pollution while letting the “good” wavelengths of light associated with the emission nebula pass through to the camera. You’ll notice much higher contrast in your images immediately, even if imaging from your light polluted backyard! And since the transmission at the key wavelengths is so high, the nebula will not be dimmed—only the background will be blacker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eNebula Hunting\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Hα-Hβ-OIII Imaging Filter for the 8” RASA is perfect for imaging emission nebulae like the North America Nebula (NGC 7000), Lagoon Nebula (M8), Orion Nebula (M42), and the Carina Nebula (NGC 3372). The imaging filter transmits key Hα-Hβ-OIII wavelengths that produce high contrast for emission nebulae.\u003c\/p\u003e\n\u003cp\u003eThe transmission spectrum for the Hα-Hβ-OIII Imaging Filter is 85% or greater at key wavelengths (486nm, 496nm\/501nm, 656nm) and less than 0.5% transmission elsewhere. The Hα-Hβ-OIII Imaging Filter for the 8” RASA is a narrowband filter that blocks much of the visible spectrum and only lets specific wavelengths through. Because of this, it will not work well on broadband emission objects, such as galaxies and star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93619_H_-H_-OIII_Imaging_Filter_RASA_8_04_480x480.jpg?v=1618006550\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eOther similar imaging filters on the market have much narrower bandpasses at the critical Hα-Hβ-OIII wavelengths, but these filters will actually block much of the incoming Hα-Hβ-OIII light for an F\/2 optical system. This is because the light is coming into the filter at a steeper angle, which causes a spectral shift. Using filters not designed specifically for use at F\/2 will cause some of the light from the nebula to be blocked, resulting in a dimmer image. The Celestron Hα-Hβ-OIII Imaging Filter for the RASA 8 was custom engineered to work at F\/2, so none of the “good” light from the nebula is inadvertently blocked by the filter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eBody and Storage\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter is machined aluminum black anodized cell with knurled rim for easy grip during installation. An anti-reflection coating has been added to the filter to help suppress reflections on the glass. The filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained. No other adapter is needed.\u003c\/p\u003e\n\u003cp\u003eEach filter comes with a foam-lined plastic storage case and retaining ring to safely store the filter or the placeholder optical window glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":38173970333871,"sku":"93619","price":329.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/products\/93614_Light_Polution_Filter_RASA_8_01_4d4be7e9-bdbf-4615-b5e3-0ccf9e8feb24.jpg?v=1611699456"},{"product_id":"nebula-filter-for-the-celestron-origin-intelligent-home-observatory","title":"Nebula Filter for the Celestron Origin Intelligent Home Observatory","description":"\u003cp\u003eEnjoy the most dazzling views of nebulae with your Celestron Origin when you add this Hydrogen-alpha, Hydrogen-beta, doubly ionized oxygen (Hα-Hβ-OIII) imaging filter. This specialized filter allows high throughput of light \u003cspan data-mce-fragment=\"1\"\u003e\u003cspan class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\" data-mce-fragment=\"1\"\u003ewavelengths from emission nebulae\u003c\/span\u003e\u003c\/span\u003e while blocking other wavelengths that could diminish image quality and detail. The result is bright, colorful nebulae images that “pop” with detail against the black sky background.\u003c\/p\u003e\n\u003cp\u003eHow does the Nebula Filter for Origin work? Emission nebulae primarily emit at discrete wavelengths of light—Hα at 656nm, Hβ at 486nm, and OIII at 496\/501nm. By strategically transmitting only these wavelengths of light and blocking the rest of the spectrum, the filter dramatically reduces the effect of light pollution. The “bad” light is blocked while the “good” light associated with emission nebulae passes through to Origin’s sensor.\u003c\/p\u003e\n\u003cp\u003eYou’ll immediately notice much higher contrast in your images, especially from your light-polluted backyard! And since the transmission at the critical wavelengths is so high, the nebula will not be dimmed—only the background will be blacker. You’ll also notice some contrast improvement in images of nebulae from darker skies, as the filter serves well in blocking natural skyglow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNebula Hunting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Nebula Filter is perfect for imaging emission nebulae like the North America Nebula (NGC 7000), Lagoon Nebula (M8), Orion Nebula (M42), the Carina Nebula (NGC 3372), and dozens more. The imaging filter offers maximum light transmission in the key Hα-Hβ-OIII wavelengths, producing high contrast for emission nebulae like these.\u003c\/p\u003e\n\u003cp\u003eThe transmission spectrum for the Nebula Filter is 85% or greater at key wavelengths (486nm, 496nm\/501nm, 656nm) and less than 0.5% transmission elsewhere. As a narrowband filter, it blocks much of the visible spectrum and only lets these specific wavelengths through. Because of this, you should not use this filter while observing or imaging broadband emission objects, such as galaxies and star clusters. For those objects, you’ll achieve the best results by removing the nebula filter and reinstalling Origin’s clear optical window.\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"float: none;\" alt=\"Nebulea filter graph for the Celestron Origin\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/Nebfiltertransmissiongraph.png?v=1702668649\"\u003e\u003c\/p\u003e\n\u003cp\u003eOther similar imaging filters on the market have much narrower bandpasses at the critical Hα-Hβ-OIII wavelengths. Unfortunately, these filters block much of the incoming Hα-Hβ-OIII light for an f\/2.2 optical system like Origin’s 6” RASA. This is because a RASA brings light into the filter at a steeper angle, which causes a spectral shift. If you use filters not explicitly designed for use at f\/2.2, some of the light from the nebula will be blocked, resulting in a dimmer image. The Nebula Filter for Origin was custom-engineered to work at f\/2.2, so none of the “good” light from the nebula is inadvertently blocked by the filter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBody and Storage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter features a machined aluminum black anodized cell with a knurled rim for easy grip during installation. We’ve added anti-reflection coatings to help suppress reflections from the glass. The filter fits directly into the filter drawer in the Celestron Origin’s front lens cell, where the optical window sits. Simply remove the clear window and replace it with the filter. Origin maintains its optical performance with the filter installed. No other adapter is needed.\u003c\/p\u003e\n\u003cp\u003eEach filter comes with a foam-lined plastic storage case to safely store the filter or the optical window that came with your Celestron Origin when not in use.\u003c\/p\u003e\n\u003cp\u003eCelestron tests every Nebula Filter for Origin individually to verify its performance. Along with your filter, you will receive a spectral transmission graph (like the one pictured above) showing the results of your filter’s test and verifying it performs as expected throughout the spectrum.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":41450032529583,"sku":"93669","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93669_Nebula_Filter_for_Origin_01.jpg?v=1703003790"}],"url":"https:\/\/www.celestron.com\/collections\/imaging-filters.oembed","provider":"Celestron","version":"1.0","type":"link"}