{"product_id":"used-altair-skytech-cls-canon-eos-clip-filter","title":"Used Altair SkyTech CLS Canon EOS Clip Filter","description":"\u003cp\u003eThis is an Altair SkyTech CLS CCD full-frame clip filter for a Canon EOS camera.  It is in very good condition:  the optics are relatively clean and the body is unmarked, but there is a mark on the left side of the filter.  See the photos.  We have taken this condition issue into consideration in the pricing.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003eThis comes in its original jewel box.  This is a bargain and won't last!  \u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAny dust you see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003eDescription\u003c\/span\u003e\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cspan\u003eEnhance your astrophotography with the Altair SkyTech CLS Canon EOS Clip Filter. Reduce light pollution and capture stunning celestial wonders. Perfectly designed for Canon EOS cameras, this clip-on filter is a must-have for avid astronomers and night sky enthusiasts. Unlock the true beauty of the cosmos with improved contrast and clarity. Elevate your astronomy game with Altair SkyTech CLS Clip Filter!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe SkyTech CLS (City Light Suppression) filter is designed to improve the visibility of various deepsky objects by blocking light pollution, while allowing light from deepsky objects through.\u003cbr\u003e \u003cbr\u003eSkyTech CLS filters are suitable for unmodified Canon DSLRs. The CLS has a wider pass-band than a UHC filter, so it gives a more natural colour rendition than a UHC filter. CLS is therefore best for mild to moderate light pollution on city outskirts or suburban locations.\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eCompatible with all APS-C sized Canon EOS cameras. Not for full frame cameras. Do not use with Canon EFS lenses because the rear elements can strike the filter. This is not an issue with most Sigma and 3rd party EF-S lenses and of course telescopes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy choose a SkyTech DSLR Clip-Filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt can be inserted or removed in seconds.\u003c\/li\u003e\n\u003cli\u003eAll lens functions (focus, preview screen, image stabilization) work as usual.\u003c\/li\u003e\n\u003cli\u003eIf you have a telescope with short space between reducer\/flattener and camera and filter wheel, or a camera lens, a clip filter is the solution.\u003c\/li\u003e\n\u003cli\u003eIt protects your sensor from dust build-up during long exposures when the mirror is up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow this filter works:\u003c\/strong\u003e\u003cspan\u003e Artificial lighting such as mercury vapour lamps, both high \u0026amp; low pressure sodium vapour lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (skyglow) are almost completely suppressed by the SkyTech CLS filter. \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe filter selectively allows light from deepsky objects through, with high transmission of ionised oxygen O-III (496nm \u0026amp; 500nm), Hydrogen Beta \/ N-beta (486nm), N-II(654nm and 658nm), H-alpha(656nm) and S-II(672nm).\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBy selectively blocking light pollution and transmitting these desirable wavelengths, the contrast and detail of deepsky objects is greatly enhanced.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSkyTech EOS Clip filters fit the following Canon EOS APS-C cameras (not EFS):\u003c\/strong\u003e\u003cbr\u003e7D MkII, 7D, 20D, 20Da, 30D, 40D, 50D, 60D, 60Da, 70D, 77D, 80D, 90D, 300D, 350D, 400D, 450D, 550D, 600D, 650D, 700D, 750D, 760D, 800D, 1000D, 1100D, 1200D, 1300D, 2000D, 4000D, 100D, 200D \u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003ePrecision laser-cut housing.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSchott glass substrate material with precision polish.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGlass thickness 1.0 mm.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 sec parallelism over both surfaces\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e95% transmission of main nebula emission lines (i.e. Ha 656nm, OIII 496nm \u0026amp; 500nm, SII 672nm and H-beta 486nm).\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm). \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eDichroic Filter Coatings:\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eMulti-layer anti-reflection coating (AR Coat). \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSpecial high homogeneity coating process with electron-beam gun evaporation and Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation with temperature change. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"SkyTech","offers":[{"title":"Default Title","offer_id":49524290584835,"sku":"U2608-CJ-SKYTECHCLS","price":60.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8778E6BC-12F6-4181-9044-2D41106715DF.jpg?v=1787777595","url":"https:\/\/milehighastro.com\/products\/used-altair-skytech-cls-canon-eos-clip-filter","provider":"Mile High Astronomy","version":"1.0","type":"link"}