{"product_id":"optolong-l-pro-light-pollution-telescope-125-camera-filter","title":"Optolong L-Pro Light Pollution Telescope 1.25\" Camera Filter","description":"\u003cp\u003eThe Optolong L-Pro filter (1.25-inch version) is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lights including mercury vapor lamps, both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm), as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eUnlike other light pollution filter UHC and CLS, L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompare the L-Pro, L-eXtreme, and L-eNhance filter transmission lines:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"Optolong L-Pro Light Pollution Telescope Camera Filter - Nikon-FF Clip-transmission-01\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Optolong_L-Pro_filter_-transmission_lines.png?v=1599593256\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Optolong L-Pro Light Pollution Telescope Camera Filter - Nikon-FF Clip-transmission-0\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Optolong_L-eXtreme_dual-band_astronomy_narrow_band_filter-transmission_lines_516ca154-029e-4066-92c5-4d172dd30b3e.png?v=1599593233\u0026amp;width=700\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Optolong L-Pro Light Pollution Telescope Camera Filter - Nikon-FF Clip-transmission-0\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Optolong_L-eNhance_-transmission_lines_19bbaaf9-249d-4ce1-a3a1-b041648b0513.jpg?v=1599593211\u0026amp;width=700\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClick on the Gallery tab thumbnail images to see the transmission lines in greater detail.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFits with CCD and DSLR cameras\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorks well on most emission nebulae, reflection nebulae and dark nebulae\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for visual observation and astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eL-Pro filter alone suppresses infrared wavelengths, and thus can be used at ease for \"L\" image shootings with CCDs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLight pollution filters 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\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer's WARNING:\u003c\/strong\u003e \u003cspan style=\"color: #ff0000;\"\u003eThe 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\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"Optolong_L-Pro_with-and-without-filter\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Optolong_L-Pro_with-and-without-filter_large.jpg?v=1526075146\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003eImage 1 (Left) shows The Orion Nebula after 1.9 hours of data with the L-Pro filter.\u003c\/p\u003e\n\u003cp\u003eImage 2 (Center) shows The Orion Nebula after 180 seconds at ISO1600 with the L-Pro filter..\u003c\/p\u003e\n\u003cp\u003eImage 3 (Right) shows The Orion Nebula after 180 seconds at ISO1600 with no filter. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSchott substrate material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThickness 2.0mm (1.25-inch, 2-inch, and 77mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThickness 1.0mm (Clip series)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFine-optically polished to ensure accurate 1\/4 \u003c\/span\u003e\u003cspan\u003ewavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh transmission at major nebula emission lines (i.e. H-alpha 656nm; OIII 496nm, and 500nm; SII 672nm; and H-beta 486nm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMulti-layers anti-reflection coating\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNon-cementing optical substrate coating\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUltra-thin filter cell minimizes vignetting by maximizing possible clear aperture (clear aperture is 26mm for 1.25-inch; 45mm for 2-inch)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAerometal Material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecise CNC Machining\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSand Blasting Process\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBlack Anodized Finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExtinction Treatment to Prevent Reflection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLaser Engraving for No Fading \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eOptolong L-Pro filter is perfect for astrophotographers fighting light pollution\u003c\/li\u003e\n\u003cli\u003eBest used for imaging most emission nebulae, reflection nebulae, and dark nebulae\u003c\/li\u003e\n\u003cli\u003eSuitable for both visual photographic observations\u003c\/li\u003e\n\u003cli\u003eEffective in suppressing light pollution sources \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":68058092044376,"sku":"yet1793391213024","price":98.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0728\/2304\/6232\/files\/optolong-l-pro-light-pollution-telescope-125-camera-filter_1.jpg?v=1793391223","url":"https:\/\/goldhourfit.shop\/products\/optolong-l-pro-light-pollution-telescope-125-camera-filter","provider":"My Store","version":"1.0","type":"link"}