{"title":"Optolong Light Pollution \u0026 Broadband","description":"\u003cp\u003eOptolong light pollution \u0026amp; broadband. Part of \u003ca href=\"\/collections\/optolong\"\u003eOptolong\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"1-25-moon-skyglow-filter","title":"1.25\" Moon\u0026Skyglow Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eMoon \u0026amp; Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eIdeally it is quite versatile filter for visual observation and astrophotography on planetary nebula.\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eWARNING: The 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\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eOptical substrate material\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eThickness 2.0mm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surface\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eUltra-thin filter cell minimize vignetting by maximize possible clear aperture (clear aperture is 26mm for 1.25”; 45mm for 2”)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eAerometal Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003ePlastic PP Case | Imported High Pressure EVA Case Lining | Silver Cardboard Box | High Density Sponge Carton Lining\u003c\/li\u003e\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529464943,"sku":"MS-1","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_moonsky_glow__79718.jpg?v=1766554923"},{"product_id":"2-moon-skyglow-filter","title":"2\" Moon\u0026Skyglow Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eMoon \u0026amp; Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eIdeally it is quite versatile filter for visual observation and astrophotography on planetary nebula.\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eWARNING: The 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\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eOptical substrate material\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eThickness 2.0mm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surface\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eUltra-thin filter cell minimize vignetting by maximize possible clear aperture (clear aperture is 26mm for 1.25”; 45mm for 2”)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eAerometal Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003ePlastic PP Case | Imported High Pressure EVA Case Lining | Silver Cardboard Box | High Density Sponge Carton Lining\u003c\/li\u003e\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529497711,"sku":"MS-2","price":74.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_moonsky_glow__45152.jpg?v=1766554931"},{"product_id":"1-25-uhc-light-pollution-filter","title":"1.25\" UHC Light Pollution Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eThe UHC (Ultra High Contrast) broadband filter 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 lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eTogether 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 photograghic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eSuitable for color CCD cameras and unmodified DSLRs\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e UHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e UHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e Light pollution filter 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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e \u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e \u003c\/span\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\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eSpectral Curve\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Nebulae\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eH-ß486.1nm OIII 495.9nm OIII 500.7nm H-a656.3nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eHg 435.8nm 546.1nm 577nm 578.1nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNa 598nm 589.6nm 615.4nm 616.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529530479,"sku":"UHC-1","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_uhc__14118.jpg?v=1766554937"},{"product_id":"2-uhc-light-pollution-filter","title":"2\" UHC Light Pollution Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eThe UHC (Ultra High Contrast) broadband filter 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 lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eTogether 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 photograghic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eSuitable for color CCD cameras and unmodified DSLRs\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e UHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e UHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42)\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e Light pollution filter 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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e \u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e \u003c\/span\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\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eSpectral Curve\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Nebulae\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eH-ß486.1nm OIII 495.9nm OIII 500.7nm H-a656.3nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eHg 435.8nm 546.1nm 577nm 578.1nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNa 598nm 589.6nm 615.4nm 616.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529563247,"sku":"UHC-2","price":124.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_uhc__63992.jpg?v=1766554943"},{"product_id":"1-25-cls-ccd-light-pollution-filter","title":"1.25\" CLS-CCD Light Pollution Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eThe CLS-CCD broadband filter 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 lightings including mercury vapor lamps, both high \u0026amp; 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 photograghic purpose at light pollution area.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eCLS-CCD is different from CLS with infrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eFit with color CCD cameras and modified DSLRs for astrophotography\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eWork well on most emission nebulae, planetary nebulae and supernova remnants\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNoticeable boost in contrast and visibility of the fainter outer detail\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eLight pollution filter 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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\n\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e \u003c\/span\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\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eSpectral Curve\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Nebulae\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e H-ß486.1nm OIII 495.9nm OIII 500.7nm H-a656.3nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eHg 435.8nm 546.1nm 577nm 578.1nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNa 598nm 589.6nm 615.4nm 616.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529596015,"sku":"CLS-CCD-1","price":139.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_cls-ccd__51848.jpg?v=1766554949"},{"product_id":"2-cls-ccd-light-pollution-filter","title":"2\" CLS-CCD Light Pollution Filter","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eThe CLS-CCD broadband filter 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 lightings including mercury vapor lamps, both high \u0026amp; 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 photograghic purpose at light pollution area.\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eCLS-CCD is different from CLS with infrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eFit with color CCD cameras and modified DSLRs for astrophotography\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eWork well on most emission nebulae, planetary nebulae and supernova remnants\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNoticeable boost in contrast and visibility of the fainter outer detail\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eLight pollution filter 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\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\n\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e \u003c\/span\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\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(255, 102, 0);\"\u003e\u003cstrong\u003eSpectral Curve\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"padding: 0px; margin: 0px 0px 10px 25px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Nebulae\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e H-ß486.1nm OIII 495.9nm OIII 500.7nm H-a656.3nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003e\u003cstrong\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eHg 435.8nm 546.1nm 577nm 578.1nm\u003c\/li\u003e\n\u003cli style=\"line-height: 20px; padding: 0px; margin: 0px;\"\u003eNa 598nm 589.6nm 615.4nm 616.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529628783,"sku":"CLS-CCD-2","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong_cls-ccd__57951.jpg?v=1766554956"},{"product_id":"l-pro-filter-1-25","title":"L-Pro Filter 1.25\"","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; 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). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529792623,"sku":"L-Pro-1","price":179.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-125inch__76399.jpg?v=1766554973"},{"product_id":"l-pro-filter-2","title":"L-Pro Filter 2\"","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; 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). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529825391,"sku":"L-Pro-2","price":254.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-125inch__01695.jpg?v=1766554979"},{"product_id":"l-pro-filter-for-canon-aps-c-cameras","title":"L-Pro Filter for Canon APS-C cameras","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; 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). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530251375,"sku":"L-Pro-EOS","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Canon_252520APS-c_252520Lpro__63720.1682640321.1280.1280.jpg?v=1766554985"},{"product_id":"l-pro-filter-for-canon-full-frame-cameras","title":"L-Pro Filter for Canon Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255); font-weight: bold;\"\u003eThis Canon full frame filter will fit the Canon 5D, 5D Mark II , 5D Mark III, and 6D only\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting including mercury vapor lamps, both high \u0026amp; 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). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530284143,"sku":"L-Pro-EOS-FF","price":346.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Clip-Filter-for-Canon-EOS-FF-L-Pro__32913.jpg?v=1766554991"},{"product_id":"l-pro-filter-for-nikon-full-frame-cameras","title":"L-Pro Filter for Nikon Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255); font-weight: bold;\"\u003eThis Nikon full frame filter will fit the Nikon D600, 610, 700, 750, 800, 800E, 810, 810A, DF\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; 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). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530316911,"sku":"L-Pro-NIK-FF","price":349.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-nikon-ff__45080.jpg?v=1766554998"},{"product_id":"l-pro-filter-for-sony-full-frame-cameras","title":"L-Pro Filter for Sony Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff; font-weight: bold;\"\u003eThis Sony full frame filter will fit the Sony A7M, A7M2, A7M3, A7R, A7R2, A7R3, A7S, A7S2, A9\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro (L-Professional) filter 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 lightings including mercury vapor lamps, both high \u0026amp; 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 photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMain Use and Performance\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for visual observation and astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.Light pollution filter 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\/p\u003e\n\u003cp\u003e\u003cspan\u003eWARNING: The 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\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNew Frame of Sony-FF Clip-in Filter Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRaw material\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eoptical glass\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eThickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e300-750nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking depth\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003elight polluton line blocking\u0026gt;90%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSurface quality\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60\/40\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSurface shape\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eλ\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eParallelism\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30s\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. Spectrum for Reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7c815045ba97fb81bf0f0f6ebcf30612_1959f5b4-bf60-4fa2-8f00-311351a2f4f7.jpg?v=1766555005\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e4.  New Frame of Optolong Sony-FF Clip Filter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSony-FF specification\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eL-Pro\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplicable Camera\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eA7M\/ A7M2\/ A7M3、A7R\/ A7R2\/ A7R3、A7S\/ A7S2\/ A7S3、A9\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplicable Lenses\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFull range of E-mount main and auxiliary lens \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e※  Due to limit lens resource, we only test the popular lens in market. If any available lens, feel free to contact Optolong customer service staff. We appreicate for your valuab testing information.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e5. How to install and remove?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/33c8423ec8ad9afe1da8288b5e3df5ce_2554ef03-c54d-490d-b0f3-ae439f4c1cf7.png?v=1766555007\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePut the camera body flat, the top of the filter \"OPTOLONG\" (the magnetic suction is on the back) into the body first (as shown in Figure 1), fixed by hand at the top, and then adjust the filter position, done for imaging (as shown in Figure 2).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRemoving the Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/d704857628aa3195f91058ca6bd8e7d0_2208d125-9757-495a-aeb0-3d03db711ad9.png?v=1766555009\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter putting the camera body flat, use the triangle piece aid to tilt the filter gently (as shown in Figure 1), and remove the filter once it is loosened. Be sure to avoid scratch the lens and the camera!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVideo Direction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKindly click below image to review video about how to install and remove the filter at Optolong \u003cstrong\u003e\u003ca href=\"https:\/\/youtu.be\/PV1j3nZ69Kk\"\u003eYouTube channel\u003c\/a\u003e\u003c\/strong\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/youtu.be\/PV1j3nZ69Kk\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2bd2ac520fadc033eb4d913029b34817_88ea60b9-dfbe-4b74-a703-c70681fad3f3.png?v=1766555010\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e6. Packing: \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eShipment kit of new frame Sony-FF L-Pro clip: \u003cstrong\u003e\u003cu\u003eL-Pro filter, Trangle piece and installation instructions\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a1e0ef63a008e4635a9286ee44cd3f4f_7cd8a9cc-afee-43ad-a72a-5cb72c332a05.jpg?v=1766555012\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/901c018b5909bc701ba44a55541c5c5b_6e20d7b8-d155-43fd-a029-1a8f90a1c77b.jpg?v=1766555014\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e7. New Frame of Sony-FF Clip-in Filter L-Pro Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI  Milky Way by Vincent Cheng\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCamera : Sony A7s mod Lens : f2 @ Tokia FiRIN 20mm ISO 6400 exp time : 20s by Vincent Cheng\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/71def0e70d8987ca73c8ceb5cd3d899f_93568235-046c-4546-a8ee-917ab69e64d9.jpg?v=1766555015\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eII by Vincent Cheng\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCamera : Sony A7s mod Lens : f2 @ Tokia FiRIN 20mm ISO 3200 exp time : 20s by Vincent Cheng\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1c5af52c5e04a6e51a57d96ebfca7146_23f21928-e095-4019-a9e1-477e3b240df4.png?v=1766555017\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII Comparason image was shot by \u003cu\u003eArnaud Besancon\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures have been realised with 5D3 Astrodon modded and Samyang 24mm F1,4 at F2, 13s exp. time,3600 isos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures are raw,without post-process\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/64ea8f99ce850f20e6f2afd4a503d576_80d47a2f-3653-4085-8f7f-b63eefe09a54.jpg?v=1766555019\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIV M42 compare image by \u003cu\u003eLuca Fornaciari Astrophotography\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6a49a37b140c2be652e593edf2292836_018fe441-e983-4dd1-9444-e303153d48ae.jpg?v=1766555020\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eV The Horsehead Nebula©\u003cu\u003eLuca Fornaciari Astrophotography\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ba7b265d595e8ad401204a9f6eb9a813_cb9ae0a9-8ab6-4b16-b54d-6b2228342e42.jpg?v=1766555022\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVI M31 Andromeda by \u003cu\u003eGary J Palmer\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eImaged earlier in the week with a bright moon. 150 x 60 seconds processed in Pixinsight. SHARPSTAR 86mm Quad ZWO 094 PRO in ROI \u003cstrong\u003e\u003cu\u003eOptolong L-Pro\u003c\/u\u003e\u003c\/strong\u003e filter Sharpcap\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ee5023b46a4fad69a169ea0d8f0a446b_dde60652-fff5-4eb0-9bd5-d314ff8a3e03.jpg?v=1766555024\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVII Here the final Image of comet 46\/P Wirtanen and the Pleiades, shot by \u003cu\u003eBlake Estes\u003c\/u\u003e.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis imaging run ended up being a marathon that took about 22 hours of processing, using \u003cu\u003e\u003cstrong\u003eOptolong L-Pro\u003c\/strong\u003e\u003c\/u\u003e filter for imaging. Its absolutely perfect!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/cb49783642bed9a76a66acdee33dc5cc_b9480660-170e-40b9-9a13-a20198b15ea1.jpg?v=1766555025\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff;\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: #3d3d3d; font-family: Roboto; font-size: 15px; background-color: #ffffff;\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe style=\"box-sizing: border-box; max-width: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: #3d3d3d; font-family: Roboto; font-size: 15px; background-color: #ffffff;\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530480751,"sku":"L-Pro-SONY-FF","price":346.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-L-Pro-Sony-FF-for-Astrophotography-wild-filed-Light-Pollution-Filters__01920.jpg?v=1766555028"},{"product_id":"l-pro-filter-for-canon-eos-r","title":"L-Pro Filter for Canon EOS-R","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIntroduction\u003c\/strong\u003e\u003cbr\u003eIn suburban areas with weak light pollution, the color balance is good. The design of multi-band pass ensures excellent color restoration. L-Pro is a low color cast filter, which specially designed for starry sky photography. That is not possible with other light pollution filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro (L-Professional) filter 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 lightings including mercury vapor lamps, both high \u0026amp; 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 photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMain Use and Performance\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for visual observation and astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.Light pollution filter 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\/p\u003e\n\u003cp\u003e\u003cspan\u003eWARNING: The 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\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Pro EOS-R Compatible Cameras and Lens\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro EOS-R Compatible Cameras and Lens\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eApplicable camera body\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eEOS R\/Ra、EOS RP、EOS R5、EOS R6\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eApplicable Lenses\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eFull range of RF main and auxiliary lens\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFull range of EF main and auxiliary lens (adapter is required）\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eTips:Due to limit lens resource, we only test the popular lens in market. If any available lens, feel free to contact Optolong customer service staff. We appreicate for your testing information.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1.3 Installation and Removing Instructions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/05d4e7c40914b3fee0917bfae39de551_a7728982-92a6-4c56-b39f-5905f423a0ca.png?v=1766568078\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eEOS-R L-Pro Clip More Explanation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDue to the particularity of Canon R series micro-single optical path, aperture design and light incident Angle, slight dark angle interference will occur when using interference filter for imaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere are two solutions to solve peripheral interference phenomenon：\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1\u0026gt;Cut out the interference areas of pictures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2\u0026gt;By post processing via RAW (attach video tutorials).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fb71928f6bfa47cd97bb18af518262a4_6d5e3201-6d23-48e6-a96b-ed7b370cc7a8.png?v=1766568079\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFinal version the Milkway by EOS R L-Pro.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCanon R+Canon RF15-35 f\/2.8+L-Pro clip Image came from domestic astrophotographer ©拂晓_718\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/01be58ed32f0d7d38f95787acc3e6ad3_02a3b108-048f-4c58-9b3f-41fed9dfa0e9.png?v=1766568081\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Pro Spectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAccording to the relatively light pollution in suburbs, the image does not produce obvious color deviation phenomenon. The multi-band spectrum is specially designed and optimized as shown in the figure below.\u003cbr\u003ePeak transmittance:  T\u0026gt;90%\u003cbr\u003eBlocking range: 380nm-750nm\u003cbr\u003eBlcoking depth: light pollution  line blocking \u0026gt;90%\u003cbr\u003eSurface quality: 60\/40(Refer to MIL-O-13830)\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7c815045ba97fb81bf0f0f6ebcf30612_d9c3c9c4-576e-4a46-9069-ce997422eecd.jpg?v=1766568083\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The RED line shows the transmission line of L-Pro filter. The artifical emission lines are shown in ORANGE. And the emission lines from constellation are shown in GREEN.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_1a998e48-1507-47db-9346-75562f454fd6.jpg?v=1766568086\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong L-Pro filter adopts precision coating based on 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\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary 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\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/22c5068a8f4783079f93c42761aa9238_cde8eac0-5d4b-4980-938a-6330aeffeaaf.png?v=1766568089\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a1e0ef63a008e4635a9286ee44cd3f4f_6175bb08-6023-4bbf-8983-d79955eb91d2.jpg?v=1766568092\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/901c018b5909bc701ba44a55541c5c5b_0de03426-90d2-4474-a2d2-f6b6852bc1c3.jpg?v=1766568095\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eL-Pro Imaging Target and Working Environment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImaging Target:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn light pollution environment, it suits for imaging the Milky Way at all seasons with wide Angle lens；\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn light pollution environment, it suits for imaging deep sky objects at all seasons;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for continuous spectrum of celestial objects, such as nebulae, galaxy, Milky Way, etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWorking Environment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro is suitable for level 3-7 according to the Botel dark space classification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/17d50b8f6e8f12d7bb33d6ed590b7b40_a5c834bc-9511-4e93-b248-82fca8b79ef6.jpg?v=1766568097\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e7. L-Pro Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI Comparason image was shot by Arnaud Besancon\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures have been realised with 5D3 Astrodon modded and Samyang 24mm F1,4 at F2, 13s exp. time,3600 isos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures are raw,without post-process\u003cbr\u003e.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1f41cc683d82eb630d00c0a1b720cc7d_f961caf8-340e-4521-9c33-ff0c695e1a62.jpg?v=1766568099\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eII Antares Rho-Ophiuchi Complex, imaged by Mehmet Ergün\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eLa Palma.. It was gorgeous .. Both the island and the night sky. Mehmet brought a few gigabytes of data.\u003cbr\u003eObject: Antares Rho-Ophiuchi Complex\u003cbr\u003eEQUIPMENT\u003cbr\u003eASKAR ACL200 APO\u003cbr\u003eSharpstar Optics\u003cbr\u003eNikon Z6a CentralDS \u003cbr\u003eRST-135\u003cbr\u003eMGEN 3\u003cbr\u003eOptolong L-pro\u003cbr\u003eOptolong Astronomy Filter\u003cbr\u003eEXIF:\u003cbr\u003e50 x 240sec. \/ ISO1600 \/ 200mm \/ F4\u003cbr\u003e+ Flats\u003cbr\u003eFullframe, no crop    \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo\/?fbid=367951258011027\u0026amp;set=a.220016599471161\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/94747d73296d3a22f848c4b073c8a88e_2f6edec7-df45-4c14-b18c-d43ba6bb0ac4.jpg?v=1766568100\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII Probably the most colorful and beautiful corner of our galaxy .., imaged by Mehmet Ergün\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eEQUIPMENT\u003cbr\u003eNikon Z6a CentralDS\u003cbr\u003eSamyang 50mm f1.4\u003cbr\u003eRainbow RST-135\u003cbr\u003eOptolong L-Pro\u003cbr\u003eLocation:\u003cbr\u003eATHOS Centro Astronómico La Palma\u003cbr\u003eLa Palma \/ 2021\u003cbr\u003eEXIF: \u003cbr\u003e90 x 240sec. \/ ISO1600 \/ F4 \/ 50mm   \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo\/?fbid=4293181824064956\u0026amp;set=gm.818913218993391\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6a1de42dc82aba5159c130971e4a501b_73ff89a4-b3bb-4ecc-90de-036e1dd4e58d.jpg?v=1766568102\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅣ The Andromeda Galaxy from Chuck’s Astrophotography\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Andromeda Galaxy is back in the night sky.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eby Optolong L-Pro filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo?fbid=228069719322609\u0026amp;set=a.124838279645754\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1bb81db9154f7e3d5170f89927e47d9b_fe8524c5-ad8c-42a2-a25e-1b99cb00b8f2.jpg?v=1766568103\" alt=\"\"\u003e\u003c\/a\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/8145909652ea8e4169fe0d9ecc56c0fd_f8868e54-7e3a-4aeb-8758-7090d2895ca4.png?v=1766568105\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e...\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●When using NK-FF \/EOS-FF clip-in filters, the lifting of the reflector will affect the optical viewfinder window (OVF), so you have to use Live View mode for shooting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Due to the different lens optical design of different manufacturers, part use of fisheye lens, ultra wide Angle lens and wide Angle lens may lead to image fuzzy at around. It is normal. Or you can choose L-Pro UT, the ultra-thin model to solve this problem.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Some entry-level models may fail to focus when using optical viewfinder (OVF) due to different focusing system designs. Using Live View(real-time display) mode for shooting will be recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Pls DO NOT shoot directly at a strong light source, because that may produce secondary reflection and lead to the degradation of image quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●When removing the clip-in filter, please place the camera flat and face up to avoid the filter touching the rear of the lens.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014031437935,"sku":"L-Pro-EOS-R","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Pro-R__71879.jpg?v=1766568107"}],"url":"https:\/\/ontariotelescope.com\/collections\/optolong-light-pollution.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}