{"title":"Optolong Filters","description":"\u003cp\u003eOptolong general filters enhance your deep-sky and planetary observations by offering broadband suppression of unwanted light — from IR\/UV cut filters to neutral density and moonlight-reduction options. These telescope accessories help optimize your imaging train by reducing skyglow and unwanted wavelengths, delivering cleaner, sharper images whether you’re doing deep-sky or planetary work. As part of a complete astrophotography gear setup, they help maintain consistent color balance, reduce background noise, and streamline your workflow under varied sky conditions. Explore these general filters to give your astro camera or telescope the flexibility to adapt to any night sky.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"subcategory-grid\"\u003e\n    \u003cdiv class=\"navList\"\u003e\n\n\n                  \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/general-filters\" alt=\"General Filters\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3d46da1c9e20c7176d9f19420034d9b3__40980.1763489464.1280.1280__31623_category.original.jpg?v=1768810743\" alt=\"General Filters\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/general-filters\" alt=\"General Filters\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eGeneral Filters\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n\n      \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/lrgb-filters\" alt=\"LRGB Filters\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/lrgb1__28538_category.original.jpg?v=1768810743\" alt=\"LRGB Filters\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/lrgb-filters\" alt=\"LRGB Filters\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eLRGB Filters\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n\n\n      \n       \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/narrow-band-filters\" alt=\"Narrow Band Filters\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-sho-filter-kit-36-3nm-produkt__29193_category.original.jpg?v=1768810743\" alt=\"Narrow Band Filters\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/narrow-band-filters\" alt=\"Narrow Band Filters\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eNarrow Band Filters\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n\n      \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/camera-clip-in-filters\" alt=\"Camera Clip in Filters\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/l-pro-r__71879_category.original.jpg?v=1768810743\" alt=\"Camera Clip in Filters\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/camera-clip-in-filters\" alt=\"Camera Clip in Filters\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eCamera Clip in Filters\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n      \n       \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/dual-band-and-light-pollution\" alt=\"Dual Band and Light Pollution\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/lxt_f2__41051_category.original.jpg?v=1768810743\" alt=\"Dual Band and Light Pollution\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/dual-band-and-light-pollution\" alt=\"Dual Band and Light Pollution\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eDual Band and Light Pollution\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n\n       \u003cdiv class=\"subcategory-item\"\u003e\n            \u003cdiv class=\"subcategory-link-container\"\u003e\n                \u003ca class=\"subcateogory-image-link\" href=\"\/collections\/multi-band-fitlers\" alt=\"Multi-Band fitlers\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/d62b322b6111da8844ae75c560dd0a8e__19544.original.jpg?v=1768810743\" alt=\"Multi-Band fitlers\"\u003e\n                \u003c\/a\u003e\n            \u003c\/div\u003e\n            \u003ca class=\"subcategory-link\" href=\"\/collections\/multi-band-fitlers\" alt=\"Multi-Band fitlers\"\u003e\n                \u003cspan class=\"subcategory-name\"\u003eMulti-Band fitlers\u003c\/span\u003e\n            \u003c\/a\u003e\n        \u003c\/div\u003e\n      \n      \n    \n  \u003c\/div\u003e\n\u003c\/div\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-enhance-1-25","title":"L-eNhance 1.25\"","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\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 \u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529727087,"sku":"L-E-1","price":233.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/opt-enhance-filter__87232.jpg?v=1766554962"},{"product_id":"l-enhance-2","title":"L-eNhance 2\"","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\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 \u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529759855,"sku":"L-E-2","price":296.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/opt-enhance-filter__45168.jpg?v=1766554967"},{"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":"lrgb-deep-sky-imaging-filter-1-25","title":"LRGB Deep Sky Imaging Filter - 1.25\"","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eThe LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\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=\"font-size: 12pt;\"\u003eFine-optically polishing for double-sides—— Ensure accurate \u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; line-height: 32px; text-align: justify;\"\u003e?\/4 wavefront and \u0026lt;30 seconds parallalism over the both surfaces\u003c\/span\u003e\u003c\/span\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=\"font-size: 12pt;\"\u003eUltrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities and dust effectively\u003c\/span\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=\"font-size: 12pt;\"\u003eIro source assisted coating—— 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\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eConstantly stringent quality testing processes—— Each filter was tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\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=\"font-size: 12pt;\"\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best servise!\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530513519,"sku":"O-LRGB-1","price":339.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/LRGB1__32345.jpg?v=1766555033"},{"product_id":"lrgb-deep-sky-imaging-filter-2","title":"LRGB Deep Sky Imaging Filter - 2\"","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eThe LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\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=\"font-size: 12pt;\"\u003eFine-optically polishing for double-sides—— Ensure accurate \u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; line-height: 32px; text-align: justify;\"\u003e?\/4 wavefront and \u0026lt;30 seconds parallalism over the both surfaces\u003c\/span\u003e\u003c\/span\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=\"font-size: 12pt;\"\u003eUltrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities and dust effectively\u003c\/span\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=\"font-size: 12pt;\"\u003eIro source assisted coating—— 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\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eConstantly stringent quality testing processes—— Each filter was tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\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=\"font-size: 12pt;\"\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best servise!\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530546287,"sku":"O-LRGB-2","price":519.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/LRGB1__28538.jpg?v=1766555039"},{"product_id":"lrgb-deep-sky-imaging-filter-36mm","title":"LRGB Deep Sky Imaging Filter - 36mm","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eThe LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eFine-optically polishing for double-sides—— Ensure accurate 1\u003cspan style=\"color: #191f25; font-family: arial, helvetica, sans-serif; line-height: 32px; text-align: justify;\"\u003e\/4 wavefront and \u0026lt;30 seconds parallalism over the both surfaces\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eUltrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities and dust effectively\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eIro source assisted coating—— 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 style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eConstantly stringent quality testing processes—— Each filter was tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best servise!\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530579055,"sku":"O-LRGB-36","price":419.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/LRGB-36__42511.jpg?v=1766555045"},{"product_id":"sho-1-25-narrowband-filter-kit","title":"SHO 1.25\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband 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\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542309999,"sku":"O-SHO-1","price":679.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/125_252520SHO__83393.1682640428.1280.1280.jpg?v=1766555826"},{"product_id":"sho-2-narrowband-filter-kit","title":"SHO 2\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband 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\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542539375,"sku":"O-SHO-2","price":989.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2_inch_filter_set_with_h-alpha_sii_and_oiii_filteres__16429.jpg?v=1766555832"},{"product_id":"sho-36mm-narrowband-filter-kit","title":"SHO 36mm\" Narrowband Filter Kit","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eSHO in OPTOLONG SHO FILTER KIT stands for SII, H-Alpha, OIII narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software. The OPTOLONG SHO FILTER KIT contains one H-ALPHA 7NM, one SII 6.5NM and one OIII 6.5NM filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe OPTOLONG 7NM H-ALPHA FILTER is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe narrowband OPTOLONG 6.5NM OIII FILTER is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eThe Optolong Sulfur-II 6.5nm Extra-Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Lato, sans-serif; font-size: 10pt;\"\u003eAll of the Optolong Filters  blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula). Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks. H-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eNarrowband 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\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; line-height: 1.6em; font-size: 13px; background-color: rgb(255, 255, 255); outline: none 0px !important;\"\u003e\u003cspan style=\"font-family: Arial;\"\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013542637679,"sku":"O-SHO-36","price":809.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/unmounted_filter_set_with_h-alpha_sii_and_oiii_filters__05831.jpg?v=1766555837"},{"product_id":"l-extreme-2-dual-band-filter","title":"L-Extreme 2\" Dual Band Filter","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e1.  L-eXtreme Introduction\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eL-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be better choice for fast systems in competitive price. It isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who is living in very light polluted areas, or when the moon is out, the L-eXtreme will be a good filter.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eUnlike the Optolong L-eNhance filter which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual band that passes Ha and OIII emission lines. The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximize nebulas signal and make the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and better protect from light pollution.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O is meaning for exploration of life.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTherefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e2.Spectrum and Characteristic\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSbustrate: B270\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThickness: 1.85mm\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTpeak:  T\u0026gt;90%\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlocking range: 300-1000nm\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlcoking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality: 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTransmitted Wavefront RMS: ?\/4\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013587398767,"sku":"LXT-2","price":395.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OL-L-EXTREME_DSC_1817_300x300__09162.jpg?v=1766557075"},{"product_id":"l-extreme-1-25-dual-band-filter","title":"L-Extreme 1.25\" Dual Band Filter","description":"\u003cspan style=\"color: rgb(20, 23, 26); font-family: system-ui, -apple-system, BlinkMacSystemFont, \" segoe ui roboto ubuntu neue sans-serif pre-wrap rgb font-size:=\"\" white-space:=\"\" background-color:=\"\"\u003eL-eXtreme is a two 7nm bandpass filter which can be used with cameras, it is also more suited for fast systems.  Unlike the L-eNhance filter which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual band that passes Ha and OIII emission lines.\u003c\/span\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013587824751,"sku":"LXT-1","price":305.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OL-L-EXTREME_DSC_1817_300x300__34458.jpg?v=1766557081"},{"product_id":"l-enhance-for-canon-aps-c","title":"L-eNhance for Canon APS-C","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\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, 0, 0); font-family: \" open sans sans-serif font-size:\u003eNotes: Compatible cameras of L-eNhance EOS-C Clip: 7D2\/82D\/800D\/77D\/70D\/760D\/750D\/700D\/650D\/600D\/60D\/60Da\/550D\/500D\/400D\/100D\/1100D\/1200D\/1300D; For Lens no limit EXCEPT for EF-S lens\u003c\/span\u003e\u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013595754607,"sku":"L-E-EOS-C","price":332.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OPTOLONG-EOS-C-L-eNhance-Filter-Dual-band-Pass-Filter-Designed-for-DSLR-CCD-Control-from__05700.jpg?v=1766557332"},{"product_id":"optolong-uv-ir-cut-filter-2-mounted","title":"Optolong UV-IR Cut Filter - 2\" Mounted","description":"\u003ccenter style=\"box-sizing: border-box; font-family: Lato, sans-serif; font-size: 16px;\"\u003e\u003ch2 style=\"box-sizing: border-box; margin: 0px 0px 16px; line-height: 1.5; font-size: 24px; text-align: left;\"\u003eOptolong UV-IR Cut Filter - 2”\u003c\/h2\u003e\u003c\/center\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003eImprove image sharpness with the addition of an Optolong UV-IR Cut Filter, which blocks Ultraviolet and Infrared transmissions but lets the visible spectral region shine through. The IR (700nm to 1100nm) and UV (300nm - 400nm) part of the spectrum are invisible to human eyes, but not to most CCD and other digital cameras, which are sensitive to 300nm to 1100nm. With the Optolong UV-IR Cut filter installed, violet halos and an overall soft image are a thing of the past. This filter also reflects heat radiation and provides great protection against dust.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003eThe Optolong 2” UV-IR Cut Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. Each filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 45mm.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003e\u003cspan style=\"box-sizing: border-box; font-weight: bolder;\"\u003eQuality Filter Materials:\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; font-family: Lato, sans-serif; font-size: 16px;\"\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eSchott B260 substrate material from Germany, 2.0mm thick\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eCNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eMultiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003e\u003cspan style=\"box-sizing: border-box; font-weight: bolder;\"\u003eOptolong Filter Manufacturing Processes and Parameters\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; font-family: Lato, sans-serif; font-size: 16px;\"\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eFilter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eSurface quality, according to MIL-O-13830, is 60\/40\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003e95% transmission at visible spectral region 420-680nm highly passing the major nebula emission lines of H-Alpha 656nm, SII 672nm and NII 654nm and 658nm\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eUltraviolet 300-400nm and infrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eOptolong’s planetary rotation system is a homogenous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eThin metal cells have a clear aperture of 45mm for 2” filters\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eEach filter comes with a plastic case with high pressure EVA case lining\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003e\u003cspan style=\"box-sizing: border-box; font-weight: bolder;\"\u003eAbout Optolong\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; padding: 0px; margin: 0px 0px 16px; font-family: Lato, sans-serif; line-height: 1.5; font-size: 16px; transition: none 0s ease 0s;\"\u003eOptolong is the Astronomy Filters division of Yulong Optics, an optical filter design and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013623509103,"sku":"O-UVIR-2","price":99.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/uvir_cut_125_and_200_1__51446.jpg?v=1766557849"},{"product_id":"optolong-sii-6-5nm-2-filter","title":"Optolong SII 6.5nm 2\" filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband 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\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632487535,"sku":"O-SII-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Sulfur-II-Narrowband-Telescope-Filter_2__47046.jpg?v=1766558089"},{"product_id":"optolong-oiii-6-5nm-2-filter","title":"Optolong OIII 6.5nm 2\" Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632520303,"sku":"O-OIII-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Oxygen-III-Narrowband-Telescope-Filter_2000x__61873.jpg?v=1766558094"},{"product_id":"optolong-oiii-6-5nm-1-25-filter","title":"Optolong OIII 6.5nm 1.25\" Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013632651375,"sku":"O-OIII-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Oxygen-III-Narrowband-Telescope-Filter_2000x__20500.jpg?v=1766558099"},{"product_id":"optolong-oiii-6-5nm-36mm-filter","title":"Optolong OIII 6.5nm 36mm filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eOIII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter is an extra Narrowband OIII-CCD 6.5 nm filter. It is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 500 nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eOIII emits 495.9 nm and 500.7 nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eMain Use and Performance\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eSuitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634257007,"sku":"O-OIII-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/oiii_36u_2__51982.jpg?v=1766558105"},{"product_id":"optolong-sii-6-5nm-1-25-filter","title":"Optolong SII 6.5nm 1.25\" filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband 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\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634289775,"sku":"O-SII-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Sulfur-II-Narrowband-Telescope-Filter_2__54156.jpg?v=1766558109"},{"product_id":"optolong-sii-6-5nm-36mm-filter","title":"Optolong SII 6.5nm 36mm Filter","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eThe SII-CCD 6.5 nm Deep Sky Imaging Filter:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eThis filter \u003c\/span\u003eis an e\u003cspan style=\"box-sizing: border-box;\"\u003extra narrowband SII-CCD 6.5 nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 15px; line-height: 1.6em; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cstrong style=\"box-sizing: border-box;\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; margin: 4px 0px 5px 30px; list-style-position: outside; list-style-image: initial; color: rgb(15, 32, 59); font-family: Poppins, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eUse with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 6px; width: 870px;\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003eNarrowband 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\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634420847,"sku":"O-SII-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sii_36u__52005.jpg?v=1766558115"},{"product_id":"optolong-1-25-h-alpha-7nm-filter","title":"OPTOLONG 1.25\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 1.25\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634551919,"sku":"O-HA-1","price":229.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong_2_H-Alpha_7nm_Filter_grande__97416.jpg?v=1766558121"},{"product_id":"optolong-2-h-alpha-7nm-filter","title":"OPTOLONG 2\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 2\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634584687,"sku":"O-HA-2","price":329.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong_2_H-Alpha_7nm_Filter_grande__93602.jpg?v=1766558126"},{"product_id":"optolong-36mm-h-alpha-7nm-filter","title":"OPTOLONG 36mm\" H-ALPHA 7nm FILTER","description":"\u003cul style=\"box-sizing: border-box; margin: 0px 0px 20px 15px; list-style-position: outside; list-style-image: initial; padding: 0px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eH-alpha 7nm 2\" Filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003eA very narrow emission-line filter\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 5px;\"\u003ePermits a 7nm bandwidth of light (focused on the 656nm wavelength) through\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin-bottom: 0px;\"\u003eBlocks transmission of contrast-killing light pollution wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 40px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013634715759,"sku":"O-HA-36","price":269.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ha_7nm_filter_1__21063.jpg?v=1766558131"},{"product_id":"optolong-variable-polarizer-filter-1-25","title":"Optolong Variable Polarizer Filter - 1.25\"","description":"\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Variable Polarizing Filter - 1.25”\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAdjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is similar to a pair of sunglasses. They work fine, but sometimes the scene is too dark or too bright, and there’s not a lot you can do about it. A variable polarizing filter is much more flexible than a Moon filter. It allows you to set the percentage of attenuation by turning the top section of the two-piece filter. Simply attach the 1.25” threaded filter to a like-sized eyepiece or astro accessory barrel, and then slowly rotate the top half of the filter—it turns 360°—to achieve the results you desire. Now you can apply more filtering to a full moon and less to a beautiful crescent—it’s your call!\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Optolong 1.25” Variable Polarizing Filter also works great to cut brightness when you are using your telescope for terrestrial observations or photography. If you have ever done photography through a SLR or DSLR camera, you may have already been introduced to the qualities of a polarizing filter, since it is a very popular accessory for polarizing the light and making the sky appear more blue. You will especially appreciate a polarizing filter when viewing over water or photographing a scene that includes a river or body of water. Simply turn the filter until you achieve the most glare-free results—you will really see the difference!\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Optolong 1.25” Variable Polarizing Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 26mm.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eQuality Filter Materials:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSchott B260 substrate material from Germany, 2.0mm thick\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eCNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eMultiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Filter Manufacturing Processes and Parameters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eFilter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality, according to MIL-O-13830, is 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e95% transmission\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThin metal cells have a clear aperture of 26mm for 1.25” filters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eEach filter comes with a plastic case with high pressure EVA case lining\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013688160367,"sku":"VPO-125","price":59.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/variable_polarizer_125_grande_1__48237.png?v=1766559804"},{"product_id":"optolong-canon-eos-cls-ccd-light-pollution-filter-clip-in","title":"Optolong Canon EOS CLS-CCD Light Pollution Filter Clip-In","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":44013700415599,"sku":"O-CLSCCD-EOS","price":169.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-CLS-CCD__33127.jpg?v=1766560166"},{"product_id":"optolong-cls-clip-on-filter","title":"Optolong CLS Clip-On Filter","description":"\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e\u003cspan style=\"margin: 0px; padding: 0px; outline: none; font-size: 12pt;\"\u003eOptolong CLS (City Light Suppression) is a dual-bandpass filter which selectively enhances emission from nebulas and suppresses the transmission of light pollution sources. CLS enhances the contrast of nebulas and reduce background brightness mostly dominated by light pollution. It has wider passband than UHC (Ultra High Contrast) and thus it enhances deep sky objects under mild to moderate light pollution yet offering a more balanced colour rendition.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003eCLS selectively cuts out light pollution emission. For example, mercury vapor lamps, high and low pressure sodium vapor lights and skyglow caused by emission from neutral oxygen in our atmosphere. Among the emission lines enhanced are OIII (496, 500nm), H-beta (486nm), NII (654, 658nm), H-alpha (656nm) and SII (672nm).  \u003c\/p\u003e\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eHighlights\u003c\/h3\u003e\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e95% transmission at major nebula emission lines\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e0.1% transmission* at off-band at Na (589nm), Hg (435nm, 578nm). \u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003ePrecise and sharp roll-off at light pollutant lines\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e2 mm filter thickness (1.25\", 2\" and 77mm) | 1mm (clip series)\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMade on Schott substrate\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eFinely polished to 1\/4 wave accuracy\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eSurface quality: 60\/40 (MIL-O-13830 standard)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e*equivalent to OD3 \u003c\/p\u003e\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003e  Recommended applications\u003c\/h3\u003e\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eCanon ESO DSLR camera\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eDeep sky colour imaging, particularly emission nebula or DSO emitting in the H-alpha, H-beta, O-III and S-II lines\u003cspan style=\"margin: 0px; padding: 0px; outline: none; font-size: 1.17em;\"\u003e \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eCoating technologies\u003c\/h3\u003e\n\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMulti layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eNon cementing optical substrate coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eElectron-beam gun evaporation with ion-assisted deposition coating technology to enhance coating durability and resistance to scratching as well as stability on central wavelength such that passband does not deviate with temperature change\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003ePlanetary rotation system offers high precision and homogeneity of coating surface ensuring high value on passband transmission and off-band blocking. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eFilter cell technologies\u003c\/h3\u003e\n\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eCNC machined with aerospace grade aluminium\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eBlack anoidised finish and extinction treatment to prevent refection\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eLaser engraved fade-free wordings \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013700612207,"sku":"O-CLS-EOS","price":149.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/EOS_C_CLS__56468.jpg?v=1766560172"},{"product_id":"optolong-cls-clip-on-filter-canon-full-frame","title":"Optolong CLS Clip-On Filter Canon Full Frame","description":"\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e\u003cspan style=\"margin: 0px; padding: 0px; outline: none; font-size: 12pt;\"\u003eOptolong CLS (City Light Suppression) is a dual-bandpass filter which selectively enhances emission from nebulas and suppresses the transmission of light pollution sources. CLS enhances the contrast of nebulas and reduce background brightness mostly dominated by light pollution. It has wider passband than UHC (Ultra High Contrast) and thus it enhances deep sky objects under mild to moderate light pollution yet offering a more balanced colour rendition.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003eCLS selectively cuts out light pollution emission. For example, mercury vapor lamps, high and low pressure sodium vapor lights and skyglow caused by emission from neutral oxygen in our atmosphere. Among the emission lines enhanced are OIII (496, 500nm), H-beta (486nm), NII (654, 658nm), H-alpha (656nm) and SII (672nm).  \u003c\/p\u003e\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eHighlights\u003c\/h3\u003e\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e95% transmission at major nebula emission lines\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e0.1% transmission* at off-band at Na (589nm), Hg (435nm, 578nm). \u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003ePrecise and sharp roll-off at light pollutant lines\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003e2 mm filter thickness (1.25\", 2\" and 77mm) | 1mm (clip series)\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMade on Schott substrate\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eFinely polished to 1\/4 wave accuracy\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eSurface quality: 60\/40 (MIL-O-13830 standard)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e*equivalent to OD3 \u003c\/p\u003e\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003e  Recommended applications\u003c\/h3\u003e\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eCanonEOS Full Frame DSLR camera  5D, 5D Mark II , 5D Mark III, and 6D only\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eDeep sky colour imaging, particularly emission nebula or DSO emitting in the H-alpha, H-beta, O-III and S-II lines\u003cspan style=\"margin: 0px; padding: 0px; outline: none; font-size: 1.17em;\"\u003e \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eCoating technologies\u003c\/h3\u003e\n\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eMulti layers anti-reflection coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eNon cementing optical substrate coating\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eElectron-beam gun evaporation with ion-assisted deposition coating technology to enhance coating durability and resistance to scratching as well as stability on central wavelength such that passband does not deviate with temperature change\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003ePlanetary rotation system offers high precision and homogeneity of coating surface ensuring high value on passband transmission and off-band blocking. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 0px; padding: 0px 0px 10px; outline: none; font-size: 18px; line-height: 27px; font-weight: 500; font-family: Cabin, Arial, sans-serif; color: rgb(253, 87, 87); background-color: rgb(255, 255, 255);\"\u003eFilter cell technologies\u003c\/h3\u003e\n\u003cul style=\"margin: 0px 0px 20px 20px; padding: 0px; outline: none; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif font-size: background-color: rgb\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eCNC machined with aerospace grade aluminium\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eBlack anoidised finish and extinction treatment to prevent refection\u003c\/li\u003e\n\u003cli style=\"margin: 0px; padding: 0px; outline: none;\"\u003eLaser engraved fade-free wordings \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cp style=\"margin: 0px 0px 20px; padding: 0px; outline: none; line-height: 21px; font-size: 15px; color: rgb(32, 32, 32); font-family: \" pt sans arial sans-serif rgb background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013701333103,"sku":"O-CLS-EOS-FF","price":159.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-optolong-cls-filter-canon-full-frame-clip__37682.jpg?v=1766560178"},{"product_id":"optolong-ha-7nm-eos-c","title":"Optolong HA 7nm EOS-C","description":"\u003cp style=\"box-sizing: border-box; margin-top: 0px; color: rgb(53, 60, 65); font-family: Inter, -apple-system, BlinkMacSystemFont, \" segoe ui roboto helvetica arial sans-serif color emoji symbol rgb none ease font-size:=\"\" background-color:=\"\" transition:=\"\"\u003e\u003cspan style=\"box-sizing: border-box; transition: none 0s ease 0s !important; color: rgb(0, 0, 0);\"\u003eThe Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are in charge of natural light pollution, or skyglow, are radically decreased, as is artificial light pollution brought about by high and low pressure sodium and mercury vapor lights. The outcome is a high contrast image that uncovers the H-alpha line in all its brilliance.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; font-family: Inter, -apple-system, BlinkMacSystemFont, \" segoe ui roboto helvetica arial sans-serif color emoji symbol rgb none ease font-size:=\"\" background-color:=\"\" transition:=\"\"\u003e\u003cspan style=\"box-sizing: border-box; transition: none 0s ease 0s !important;\"\u003eThis Optolong H-Alpha EOS APS Clip filter will give a well defined contrast between the skyglow background and H-alpha transmitting objects, but since it has a FWHM of only 7nm, you won't see the same number of stars in the last picture as you would with the Optolong 12nm H-Alpha Filter. \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin-bottom: 0px; font-family: Inter, -apple-system, BlinkMacSystemFont, \" segoe ui roboto helvetica arial sans-serif color emoji symbol rgb none ease font-size:=\"\" background-color:=\"\" transition:=\"\"\u003e\u003cspan style=\"box-sizing: border-box; transition: none 0s ease 0s !important;\"\u003eThe Optolong EOS APS H-Alpha 7nm Filter is made with Schott glass that has been multi-coated with  ion-assisted deposition technology to guarantee scratch resistance and soundness on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and  finally laser engraved.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin-bottom: 0px; font-family: Inter, -apple-system, BlinkMacSystemFont, \" segoe ui roboto helvetica arial sans-serif color emoji symbol rgb none ease font-size:=\"\" background-color:=\"\" transition:=\"\"\u003eNot Compatible with EF-S lenses \u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin-bottom: 0px; font-family: Inter, -apple-system, BlinkMacSystemFont, \" segoe ui roboto helvetica arial sans-serif color emoji symbol rgb none ease font-size:=\"\" background-color:=\"\" transition:=\"\"\u003e\u003cspan style=\"box-sizing: border-box; transition: none 0s ease 0s !important;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013701431407,"sku":"O-Ha-EOS","price":299.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-optolong-h-alpha-7nm-eos-clip-filter-1130__68001.jpg?v=1766560182"},{"product_id":"optolong-sho-3nm-narrowband-filters-kit-36mm","title":"Optolong SHO-3nm narrowband filters kit 36mm","description":"\u003cspan style=\"font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong SHO-3nm filter kit includes SII3nm, H-Alpha3nm, and OIII3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong SHO-3nm Narrowband Filters Introduction\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eExtra narrowband SIICCD3nm filter  (Sulfur II for CCD) is designed for nebula observation allowing 3nm bandwidth of light  centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eH-Alpha 3nm filter is the popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotography filter for highest contrast and revealing subtle nebula details. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eExtra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernoval remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eGive you higher contrast and greater detailed viewing;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eDecrease background noise and improve the contrast of objects;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIncrease the faint nebula signal and make it to be brightness;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eWith narrow band filters kit, you are able to process a Hubble image;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eThrough the optimization of the substrate and upgrading of coating technology.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eReference Spectrum\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/56095a94c3cebfd0ebdc80f423d27c58_5c02a12e-f3f7-4b80-b5e0-d2f86e183d9a.png?v=1766561315\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 462px; width: 1000px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The BLUE line shows the transmission of OIII3nm.The H-Alpha 3nm line is shown in GREEN. And the SII 3nm filter line is shown in RED. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013739343983,"sku":"O-SHO-3-36","price":1369.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-sho-filter-kit-36-3nm-produkt__29193.jpg?v=1766561317"},{"product_id":"optolong-sho-3nm-narrowband-filters-kit-2","title":"Optolong SHO-3nm narrowband filters kit 2\"","description":"\u003cspan style=\"font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong SHO-3nm filter kit includes SII3nm, H-Alpha3nm, and OIII3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong SHO-3nm Narrowband Filters Introduction\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eExtra narrowband SIICCD3nm filter  (Sulfur II for CCD) is designed for nebula observation allowing 3nm bandwidth of light  centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eH-Alpha 3nm filter is the popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotography filter for highest contrast and revealing subtle nebula details. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eExtra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernoval remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eGive you higher contrast and greater detailed viewing;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eDecrease background noise and improve the contrast of objects;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIncrease the faint nebula signal and make it to be brightness;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eWith narrow band filters kit, you are able to process a Hubble image;\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eThrough the optimization of the substrate and upgrading of coating technology.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eReference Spectrum\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/56095a94c3cebfd0ebdc80f423d27c58_802f74d5-c34b-498b-ba29-2c995e7f60fd.png?v=1766561323\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 462px; width: 1000px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e?The BLUE line shows the transmission of OIII3nm.The H-Alpha 3nm line is shown in GREEN. And the SII 3nm filter line is shown in RED. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013739475055,"sku":"O-SHO-3-2","price":1669.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/SHO_2525203nm__34310.1682640975.1280.1280.png?v=1766561325"},{"product_id":"optolong-planetary-filter-kit-1-25","title":"Optolong Planetary Filter Kit - 1.25\"","description":"\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eOptolong Planetary Filters Kit \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong Planetary filters kit including UV\/IR Cut, R, G, B and IR685 filter, 5pcs filters in total. These five filters are bundled by \"Solar System Seal\".\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eWhat filters are used for Planetary photography?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003ePhotography of planets and deepsky imaging, both are fine to use the combination of monochrome camera and filters. But slightly different, planets photography will not use what deepsky image use like Ha, SII, OIII filter. Planetary photography using filters often are IR, UV, filters, etc. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe main aim is to capture the specific spectrum, such as rich carbon dioxide. One of the most common filter used is an infrared filter or IR filter\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn nature, the longer the wavelength of light, the less affected it is by atmospheric seeing. Relatively, receiving the influence of red light, or infrared light is far less than the other bands. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThus when imaging a planet, and to aid in reducing the influence of less than optimal seeing conditions, the use of an an IR filter is used to capture  only  infrared, or near-infrared light. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn visible light, planetary imagers will use the more traditional RGB filters. For Mercury, Venus, Uranus and Neptune, IR685 comes fist, and for Saturn, Jupiter, UV\/IR Cut, R, G, B are good. However, the portfolio of IRRGB is popular. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; background-color: rgb(0, 0, 205); color: rgb(255, 255, 255);\"\u003eIR685 Introduction\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong IR Pass685 filter is designed to block the most visible lights and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths. The advantage of the IR685 filter is to reduce the effects of atmospheric jitter. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe sensor of  a CCD or CMOS camera is capable of detecting light in the 350nm -1100nm range including infrared wavelengths. Optolong IR685 cuts off the visible part of the spectrum and allows near infrared light to pass.  In poor seeing conditions the light signal that is most effected by this atmospheric condition is rejected. It will highly improves images on visibility, contrast and details of planets and the moon.  IR685 is usually used as a key factor of portfolio IRRGB. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eImaging Target:\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIR685 is for imaging of bright planets, stars, and comet, like Uranus, Neptune, Jupiter, Saturn, Mars, Moon, et. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR685 Spectrum for Reference\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a55a2444e33d1df2170a42299f735741_c208151a-805b-45e5-acb8-5b4a87dc48bf.png?v=1766561971\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 346px; width: 631px;\"\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eHow to read the chart?\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe vertical axis is Transmission in %.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR685 characteristic:\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eTave: T\u0026gt;95%\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eTransmission area: 700-1100nm\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eBlocking are:  300-600nm\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eBlocking depth: blocked\u0026gt;99%\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSurface quality: 60\/40(Refer to MIL-O-13830)\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSurface accuracy: ?\/4\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eParallelism: 30'\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; background-color: rgb(0, 0, 205); color: rgb(255, 255, 255);\"\u003eUV\/IR Cut, R, G, B Filters Introduction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eUV and IR light focus at a different point.  Optolong UV\/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum.  This will eliminate star bloat from your images.  \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eOptolong RGB set divides the spectrum into its components red, green and blue. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eRGB, parfocal: 1:1:1\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eCreate images in their true original colors showing a wealth of natural detail;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSteep bandpass filters to eliminate UV and IR interference;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eUV\/IR Cut, Red, Green, and Blue filters to reproduce the star's color;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eMain use \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eIn visible light, astrophotographers are use  traditional RGB fitters. If you have Optolong LRGB filters, just try R filter for moon photography, and expect good results. If you want more clear details of the Moon, then consider Optolong IR685 filter.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eSuitable for color CMOS and CCD cameras and modified DSLRs;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eAvailable to assist in focusing;\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eAct as an outstanding dust shield, which prevents the possibility of dust settling on the lens when long time exposure. \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eUV\/IR Cut, R, G, B Filters Spectrum for Reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3a6352900ea5f34a85be941765242934_753e81ef-dd74-4e51-8e0b-da9d5e87f5d0.png?v=1766561972\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 495px; width: 800px;\"\u003e\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eHow to read the chart?\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe vertical axis is Transmission in %.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003eThe WHITE line shows the transmission of the UV\/IR Cut filter. R filters line is shown in RED. G filter line is shown in GREEN. And the B filter line is shown in BLUE.\u003c\/p\u003e\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013756579951,"sku":"O-UVIRGB685-1","price":349.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/o-UVIRRGB685__63068.jpg?v=1766561975"},{"product_id":"optolong-l-ultimate-dual-3nm-filter","title":"Optolong L-Ultimate dual-3nm filter","description":"\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIt's a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Maximizes the transmission of the main emission lines of the nebula in OIII (496nm and 500nm) and H-alpha (656nm). Used with DSLR, color\/MONO CMOS and CCD, however, this filter is not suitable for fast ratio systems.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eThe advantage of L-Ultimate is that it only passes through the emission lines OIII(500.7nm) and Ha(656.3nm), in which case all other light pollution emission lines are eliminated so that only the emission and reflection signals of the nebula are captured during imaging. Therefore, the sky background of the image is darker, and the contrast between the nebulae and the signal-to-noise ratio are improved to the greatest extent. In heavy light pollution areas, the product can also selectively filter light pollution and clutter signals through the emission lines of nebulae, and finally avoid the impact of light pollution on astrophotography.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIt is different from the series of dual-narrowband L-eNhance and L-eXtreme in that L-Ultimate is a dual-3nm bandwidth filter that only passes through Ha and OIII emission lines. You will get a darker sky background, more contrast of the image and the suppression on stars. L-Ultimate has also been optimized in terms of halo performance, so that there is no obvious halo when shooting on a bright star object.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eMulti-layers anti-reflection coating\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eNon-cementing optical substrate coating\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong 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\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\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\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013781319791,"sku":"L-Ultimate","price":549.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-U1__11666.jpg?v=1766562590"},{"product_id":"optolong-ir-pass-685nm-2","title":"Optolong IR Pass 685nm 2\"","description":"\u003cspan style=\"font-family: Arial; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003eIR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR Pass685 Introduction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 10pt;\"\u003eOptolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 10pt;\"\u003eThe sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR Pass685 Spectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eSbustrate: B270\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eThickness: 1.85mm\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eTave:  T\u0026gt;90%\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eBlocking range: 350-1050nm\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eBlcoking depth: light pollution  line blocking \u0026gt;99%\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eSurface quality: 60\/40\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eTransmitted Wavefront RMS: ?\/4\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f38d04404d461d5c64dd2159dc025330_870265cc-86e5-4418-ac58-9f2f8e31a542.png?v=1766562599\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 346px; width: 631px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013783056495,"sku":"IR 685-2","price":164.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/O-IR685__59774.jpg?v=1766562601"},{"product_id":"optolong-ir-pass-685nm-1-25","title":"Optolong IR Pass 685nm 1.25\"","description":"\u003cspan style=\"font-family: Arial; font-size: 14px; background-color: rgb(255, 255, 255);\"\u003eIR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/span\u003e\u003cdiv\u003e\u003cspan style=\"font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR Pass685 Introduction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 10pt;\"\u003eOptolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 10pt;\"\u003eThe sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 18px;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eIR Pass685 Spectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eSbustrate: B270\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eThickness: 1.85mm\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eTave:  T\u0026gt;90%\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eBlocking range: 350-1050nm\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eBlcoking depth: light pollution  line blocking \u0026gt;99%\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eSurface quality: 60\/40\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eTransmitted Wavefront RMS: 1\/4\u003cbr style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: \" microsoft yahei font-size: background-color: rgb text-align: center\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f38d04404d461d5c64dd2159dc025330_0c1ef099-a786-47d0-bc0e-8c33b2ad0042.png?v=1766562607\" style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-width: 100%; height: 346px; width: 631px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013783187567,"sku":"IR 685-1","price":109.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/O-IR685__87378.jpg?v=1766562609"},{"product_id":"optolong-variable-polarizer-filter-2","title":"Optolong Variable Polarizer Filter - 2\"","description":"\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Variable Polarizing Filter - 1.25”\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eAdjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is similar to a pair of sunglasses. They work fine, but sometimes the scene is too dark or too bright, and there’s not a lot you can do about it. A variable polarizing filter is much more flexible than a Moon filter. It allows you to set the percentage of attenuation by turning the top section of the two-piece filter. Simply attach the 1.25” threaded filter to a like-sized eyepiece or astro accessory barrel, and then slowly rotate the top half of the filter—it turns 360°—to achieve the results you desire. Now you can apply more filtering to a full moon and less to a beautiful crescent—it’s your call!\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Optolong 1.25” Variable Polarizing Filter also works great to cut brightness when you are using your telescope for terrestrial observations or photography. If you have ever done photography through a SLR or DSLR camera, you may have already been introduced to the qualities of a polarizing filter, since it is a very popular accessory for polarizing the light and making the sky appear more blue. You will especially appreciate a polarizing filter when viewing over water or photographing a scene that includes a river or body of water. Simply turn the filter until you achieve the most glare-free results—you will really see the difference!\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe Optolong 1.25” Variable Polarizing Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 26mm.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eQuality Filter Materials:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSchott B260 substrate material from Germany, 2.0mm thick\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eCNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eMultiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-weight: bold; font-family: Arial;\"\u003eOptolong Filter Manufacturing Processes and Parameters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eFilter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality, according to MIL-O-13830, is 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e95% transmission\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThin metal cells have a clear aperture of 26mm for 1.25” filters\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eEach filter comes with a plastic case with high pressure EVA case lining\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013884276847,"sku":"VPO-2","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/variable_polarizer_125_grande_1__34952.png?v=1766565480"},{"product_id":"optolong-l-extreme-f2-dual-band-filter-2","title":"Optolong L-Extreme F2 Dual-Band Filter 2\"","description":"\u003cp\u003e\u003cspan\u003eTake your Hyperstar, RASA, or Rokinon F2 DSLR lens to new heights.   Designed for Fast optics vetween F2-F3.5\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the requirements for transmission at continuously varying angles. Astronomically characterised spectral lines (OIII, Ha) as the main transmission wavelengths, the OIII and H-Alpha nebula emission lines pass accurately at f2 - f3.3 Focal Ratio.   It's a product that Optolong has developed specifically for fast optical systems, or fast focal ratio imaging systems. It has performed well on RASA, HyperStar and other fast ratio telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eKey Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTogether with one-shot colour astronomical cameras, monochrome astronomical cameras, and Digital SLR cameras, you can fast and quickly obtain clear and detailed images of the deep sky;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIdeal for fast optical system, like RASA, Hyperstar and other fast focal ratio telescope users;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecommended for using fast optical system with focal ratio from f2 to f3.3;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAnti-light pollution、better contrast、more details of the celestial bodies:This filter cuts out background light and noise beyond the target celestial bodies to get better details and contrast of the images. L-eXtreme F2 can effectively block light pollution so that the images will not affected by unwanted lights, and sky light of the background. You can quickly get satisfactory pictures in fast optical systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSbustrate\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\u003e1.85mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eOIII 7nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHa 7nm\u003c\/span\u003e\u003c\/p\u003e\n\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\u003e300-1000nm\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\u003e\u0026gt;OD4\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\u003eTransmitted Wavefront RMS\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\u003e Parallelism\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\u003eBased on the characteristics of celestial bodies’ emission lines and light pollution emission lines, the L-eXtreme F2 retains the prominent nebula OIII and Ha colours while blocking most of the light pollution. Specifically designed and optimally calculated for the characteristics of a fast optical system, the L-eXtreme F2 always keeps both OIII and Ha bands having high transmittance, which helps users to capture nebulae emission lines in these bands more accurately and quickly, and obtain better astrophotographic images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/30eaf24fdaf807b26d773ea5807517e4_8f724db7-9939-4c5b-aec7-774bfbcebc9b.jpg?v=1766568055\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\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\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_254844ff-2226-4755-b350-d88a6a3e7155.jpg?v=1766568057\" 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\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 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_dfbb67b1-248f-4a41-855e-89298cc7132d.png?v=1766568059\" 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 \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\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\/a853b9fa6cd8dff29d844be5e277a9e7_b1912cb3-4313-4f75-8a5a-c3f6dceb7b0d.jpg?v=1766568060\" 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\u003e6. L-eXtreme F2 Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eI. Test of the new Optolong Astronomy Filter L-Extreme F2 filter ©  Tommaso Massimo Stella     \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSadr and the Belly of the Cygnus.\u003cbr\u003eSadr is a yellow super giant star, 33,000 times more luminous than the Sun and 12 times more massive.\u003cbr\u003eIt is identified in the center of this wide-field image which portrays the center of the Northern cross (internal asterism in the constellation Cygnus). At bottom center and to the left, the Crescent nebula and the effects (cyan color, OIII) of the star Wolf-Rayet 134 can be seen.\u003cbr\u003eThe filter under test is designed to work with super fast optics centered on a focal ratio of 2. For the occasion, a full aperture Samyang 135mm f\/2 lens connected to the Omegon veTec571V4 camera was used.\u003cbr\u003eThe result is the stack of 11 exposures of 300 seconds and the processing was limited to the adjustment of the curves and a minimal stellar reduction without the use of AI tools.\u003cbr\u003eSky: SQM 19.95\u003cbr\u003eIn the first comment you can find insights into the test.\u003cbr\u003eSoon you will see published a more complete work on much weaker subjects.\u003cbr\u003eCredit: Tommaso Massimo Stella\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo?fbid=10225422708688182\u0026amp;set=a.1349013078910\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f21441527c08dc44ee513c1a500446de_9d30e9da-3647-4923-ba93-d59236d79160.jpg?v=1766568062\" 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 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eII. The Bubble Nebula ©Luke Newbould \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e52x2m exposures, RASA11, Player One Uranus-C Pro camera\u003cbr\u003eOptolong-L-Extreme f2 filter\u003cbr\u003eCaptured with NINA, \u003cbr\u003eStacked with AstroPixelProcessor, \u003cbr\u003eProcessed in PixInsight\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\/21cee766946b225cc7089f5074877030_fad82a47-9b88-49ec-9c6a-eb275ca42f5d.jpg?v=1766568064\" 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\u003cu\u003e\u003cstrong\u003eIII. NGC 6871, WR 134 \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e©João Berbereia\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTest with the new Filter Dual Narrowband L-eXtreme for F2 2\". The filter captures the light emitted by ionized hydrogen atoms (Hα 7nm) and doubly ionized oxygen ions (OIII 7nm) in the spectra of astronomical objects, such as nebulas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis image was capture for a duration of 30x300 seconds, totaling 2 hours and 50 minutes. It was taken from my backyard on August 14, 2023, on Terceira Island, Azores, Portugal.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGear Info:\u003cbr\u003eCelestron C8 HD + Hyperstar V4 （f1.9） 390mm\u003cbr\u003eIoptron CEM40EC\u003cbr\u003eASI071MC -10 100gain\u003cbr\u003eOptolong L-eXtreme F2 2\"\u003cbr\u003eEAF\u003cbr\u003eASI290MM\u003cbr\u003eSky-Watcher 50ED\u003cbr\u003eASIAIR\u003cbr\u003eBortle 4 - moon3% \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/9fb69e0a83b62c3a6b297b5dc30c3dbd_91772acf-eda3-45d1-83b7-e065e4dee392.jpg?v=1766568066\" 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 \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eIV.  Rosette Nebula © \u003ca href=\"https:\/\/www.facebook.com\/astronomono007\/posts\/pfbid0EjnNGx2fDHi8DYcAQhPyQ6P4RDysEF9Suc5tmAdFEae4Sd9jMrY7owZKKCFkg92sl\"\u003eAstrono Mono\u003c\/a\u003e \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRosette Nebula, also known as Caldwell 49, is an H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, as the stars in the cluster formed from matter in the nebula.\u003cbr\u003eThe nebula has been observed to have a shape reminiscent of a human skull and is sometimes referred to as the \"Skull Nebula\". It should not be confused with NGC 246, which is also nicknamed the \"Skull Nebula\". \u003cbr\u003eTechnical data :\u003cbr\u003e45 x 300s L-eXtreme f\/2\u003cbr\u003eTakahashi Epsilon 180 ED (f2.8 focal ratio)\u003cbr\u003eZWO ASI2600MC-Pro Camera -10° ZWO ASI2600MC-Pro Camera -10° ZWO ASI2600MC-Pro Camera -10\u003cbr\u003eZWO EAF+ ZWO EFW + ZWO ASI AIR PRO\u003cbr\u003eZWO ASI 462 MC Guide Camera - Guidescope orion 80edcf\u003cbr\u003esqm 18.53 Cgem mount\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/astronomono007\/posts\/pfbid0EjnNGx2fDHi8DYcAQhPyQ6P4RDysEF9Suc5tmAdFEae4Sd9jMrY7owZKKCFkg92sl\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/8fff0674968eaf86bc57956e4d2abb66_0b7f7200-856f-416f-b05c-e61f69882bdb.jpg?v=1766568068\" 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 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cspan\u003e\u003cstrong\u003eV. The Cygnus Loop \u003c\/strong\u003e\u003c\/span\u003e\u003c\/u\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e© Georg Nyman\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAstrophotographer Georg was taking images with RASA and the full frame QHY600C camera. \u003cbr\u003eThe Cygnus Loop – an object which is a very well known target of Ha and OIII. Indeed, Optolong L-eXtreme F2 performed very well and the separation of Ha and OIII is excellent – see attached result. \u003cbr\u003eThe image is a 2x1 mosaic\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Dr. Georg N. Nyman\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\/32f461d9fec6c329d304c68e73346b82_874415bb-24e6-4fb7-a2af-b42ba7ee2a48.jpg?v=1766568070\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014031011951,"sku":"LXT-2-F2","price":404.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/LXT_F2__41051.jpg?v=1766568072"},{"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"},{"product_id":"optolong-l-quad-enhance-filter","title":"Optolong L-Quad Enhance Filter","description":"\u003cp\u003eL-Quad Enhance Filter (L-QEF) is a quad bandpass light pollution suppression filter for colour cameras. It effectively suppresses the transmission of light pollution wavelengths, especially light pollution generated by artificial lighting (including mercury and sodium lamps), as well as the effects of natural skylight-induced effects on the shot, thus effectively enhancing the contrast and details of the celestial bodies, and making the objects more distinct and stereoscopic. This filter provides better color balance while improving resistance of light pollution. L-QEF can be used for both wide field astrophotography, such as the Milky Way in Summer and Winter, and deep sky objects such as nebulae, galaxies, star clusters, and so forth; It allows you to save a lot of time during the shooting process and get better results at the same time. The design of quad bandpass maximises the colour balance of nebulae, galaxies and other broadband spectral targets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCuts out light pollution from mercury and sodium lamps and produces a nice broadband image with minimal colour cast;\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio (SNR);\u003c\/li\u003e\n\u003cli\u003eNear IR cut-off to 1000nm, reducing the effects of IR noise;\u003c\/li\u003e\n\u003cli\u003eL-QEF has more than 90% transmittance of the nebula emission lines at H-Beta\/OIII\/H-Alpha\/SII, with cut-off depth from OD2 to OD4, thus providing a significant increase in resistance to light pollution. L-QEF is good for night sky from Bortel 1 to Bortel 7 levels; (Bortel 8, Bortel 9 environments shall not be recommended, kindly chose Optolong other narrow-band filters, 3nm, 7nm type of filters are available.);\u003c\/li\u003e\n\u003cli\u003eSuitable for wide range of deep sky targets: it covers most nebulae, galaxies, star clusters, reflected and emitted line signals astronomical objects with higher contrast and rich details while maintaining excellent colour balance. L-QEF is superior to other filters of the same type.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSbustrate\u003c\/td\u003e\n\u003ctd\u003eoptical glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eQuad bandpass filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking range\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eOD2-OD4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront RMS\u003c\/td\u003e\n\u003ctd\u003eλ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e Parallelism\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBased on the characteristics of celestial bodies’ emission lines and light pollution emission lines, L-Quad Enhance filter effectively reduces the impact of light pollution and suppresses the background light of astronomical objects, thus effectively enhancing the contrast and details of the celestial bodies. Using L-QEF filter can help you save a lot of time during the shooting process, yet obtaining incredible results.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_9b71fce5-43d1-415d-9743-156e271388b8.jpg?v=1766568128\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_25b08899-0043-4595-9a8f-2e31e029c55e.jpg?v=1766568130\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e·Multi-layers anti-reflection coating\u003c\/p\u003e\n\u003cp\u003e·Non-cementing optical substrate coating\u003c\/p\u003e\n\u003cp\u003e·Optolong 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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOuter Box: silve box\u003c\/p\u003e\n\u003cp\u003ePlastic Box: PP material\u003c\/p\u003e\n\u003cp\u003eLining: imported high pressure white EVA material\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/c656702f1ca52b7dc92d472bba4be081_419c1dc0-6c51-4b2b-a8c2-90f254c2b1b0.jpg?v=1766568131\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eL- Quad Enhance Filter (L-QEF) Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eI. The Seven Sisters meet the Comet ©  Vincent Cheng (China Hongkong)     \u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eThe seven sisters meet the Comet\u003cbr\u003eEquipment：\u003cbr\u003eDate \/Location :\u003cbr\u003e17-18, SEP, 2023\u003cbr\u003eDanXiaShan STARHOUSE, China（Bortle 4）\u003cbr\u003eCamea : ASI294MC Pro (cooled at 0C)\u003cbr\u003eGain : 120\u003cbr\u003eTelescope: William Optics RedCat 51 (250mm f4.9)\u003cbr\u003eFilter : Optolong L-QUAD ENHANCE 2-inch\u003cbr\u003eMount: iOptron SmartEQ PRO+\u003cbr\u003eGuide:  ASI120MM mini, ZWO OAG\u003cbr\u003econtrolled by ASIAIR plus\u003cbr\u003eExposure: 180s X 80frames\u003cbr\u003ew Dark Frames, Bias Frames, flat Frames\u003cbr\u003eprocess w PI,PS CC\u003cbr\u003eCredit: Vincent Cheng\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ab81cbde0345bb95f6e3c70c1211d265_e362d0cf-ebba-4ab6-84ee-c558219c25db.jpg?v=1766568133\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eII. Double Cluster  ©Astrodoc Ron Brecher（Canada） \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eThis image is a test of the new Optolong L-Quad Enhance Filter (LQEF), a light pollution filter for broadband photography. This test was conducted under a full Moon and moderate transparency – a tough test for any filter. For my first target I chose the Double Cluster to evaluate star colours and shapes. This filter performed well on these targets. I will test on a galaxy when the Moon is out of the sky.\u003c\/p\u003e\n\u003cp\u003eNGC 869 (right) and NGC 884 each contain hundreds of stars and are about 13 million years old (compared to 75-150 million years for the Pleiades). Lying about 7,500 light years away and a few hundred light years apart, they have a combined mass about 6,500 times our Sun’s. However, their combined halo is more than 20,000 solar masses. The clusters are moving towards us at a speed of about 40 km\/s.\u003c\/p\u003e\n\u003cp\u003eThese open clusters are bright enough that they were originally given star designations (h- and Chi Perseus). They are visible to the naked eye, appearing as an oval foggy patch in a dark sky. They look like sparkling white diamond dust in binoculars or a small telescope. \u003cbr\u003eTekkies:\u003cbr\u003eTakahashi FS-60CB scope with flattener at f\/6.2 and QHY367C Pro one-shot colour camera with Optolong L-Quad Enhance Filter.\u003c\/p\u003e\n\u003cp\u003eAcquisition and Paramount MX control with N.I.N.A.\u003c\/p\u003e\n\u003cp\u003eNo guiding All pre-processing and processing in PixInsight.\u003c\/p\u003e\n\u003cp\u003eAcquired from my SkyShed in Guelph on September 29, 2023. Average transparency and seeing, full Moon.\u003c\/p\u003e\n\u003cp\u003e42x5m chrominance = 3hr30m\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astrodoc.ca\/double-cluster-2023\/?fbclid=IwAR2n2qjMdmpycL8QjXDuig1IPnlKXcLZ5_sv4S0YFSkFczYpk5S47q7lTtE\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/683bb9bcfc4b10f1a169f16366e7a885_55bc9db9-13be-41de-8031-0932c99bcaba.jpg?v=1766568135\" 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\u003cu\u003e\u003cstrong\u003eIII. LDN 1235 Shark Nebula  ©Andrea Maggi (Italy) \u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eLDN 1235 Shark Nebula \u003cbr\u003eTesting the new Optolong filter for colour cameras\u003cbr\u003eSharpstar 76PH telescope \u003cbr\u003eCamera ZWO ASI 2600MC\u003cbr\u003eOptolong filter L-Quad Enhance Filter (L-QEF)\u003cbr\u003e11 hours of exposure\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/49deb2c530aa611105c6ecea0d48fd6c_364dbd36-e554-44fc-81ec-98bf8d0e0df0.jpg?v=1766568137\" 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\u003cu\u003e\u003cstrong\u003eIV.  The globular star cluster (M92) © Tommaso Massimo Stella (Italy) \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eThe globular star cluster (M92)\u003cbr\u003eThe performance of the filters is very good.\u003cbr\u003eDate: 2023-07-23\u003cbr\u003eLocation: Valle degli Ulivi (Taranto-Italy)\u003cbr\u003eSKY: SQM 19.85\u003cbr\u003eLights: 41x180s BIN2\u003cbr\u003eTelescope: Sky-Watcher 250\/1000 + GPU Coma Corrector\u003cbr\u003eCamera: Omegon veTEC 571C V4\u003cbr\u003eFilters: New Optolong Astronomy Filter broadband filter L-QEF\u003cbr\u003eMount: Skywatcher AZ-EQ6 GT\u003cbr\u003eProcessing: DeepSkyStacker, PixInsight, Photoshop CC\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fe6ac906ced83059b5b7679db589b355_a4135fce-f5be-47c6-ba53-d1f2150ff070.png?v=1766568138\" 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\u003cu\u003e\u003cstrong\u003eV. The Sculptor Galaxy © First Person View Astro (Frank Arapovic)  \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eHere is my latest edit of NGC253 also goes by the name of The Sculptor Galaxy or by the name The Silver Dollar Galaxy. It is estimated to be about 45,000 light years across and 11.4 million light years away from Earth.\u003c\/p\u003e\n\u003cp\u003eThis image was taken with the new Optolong Filter User L-Quad Enhance Filter. This filter is excellent. The first thing you notice and really stands out after you open up the package is the build quality of the filter, it is second to none. You can see that the manufacturing and QC process has been to the highest standard.\u003c\/p\u003e\n\u003cp\u003eBut as you can see in the image it's the results that truly matters and I have found that this filter is capable of doing what it states, providing excellent image quality in light polluted areas.\u003c\/p\u003e\n\u003cp\u003eProcessing the image was easy too. There are no halos around bright stars thus far. I have imaged other targets but with only a limited amount of subs, such as M17 and NGC2070, however with the limited time I have had on those targets it's shown to be promising.\u003c\/p\u003e\n\u003cp\u003eI am yet to image some more difficult targets such as The Orion Nebula but I am keen to do so ASAP.\u003c\/p\u003e\n\u003cp\u003eThe image was taken in a bortle 5 location with the moon out over two nights of the 4th and 5th of October 2023\u003c\/p\u003e\n\u003cp\u003eCelestron EdgeHD8 at f7\u003cbr\u003eZWO ASI2600MC Pro, gain 101, -10c\u003cbr\u003e154 x 180sec subs, cropped\u003cbr\u003e30 x darks\u003cbr\u003e30 x flats\u003cbr\u003e30 x flat darks\u003cbr\u003eStacked and Processed with PixInsight\u003c\/p\u003e\n\u003cp\u003eBortle 5, backyard Auckland, New Zealand\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ace6fa6a8881a5d85e9f87e9db1d1c3b_b00f62d8-cb8b-4305-9d63-0cbb8d33f2ea.png?v=1766568140\" 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\u003cu\u003e\u003cstrong\u003eVI. NGC7000 and the Pelican Nebula  © Shawn Nielsen (Canada)\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eNGC 7000 (left) and the Pelican Nebula (right) imaged with the new Optolong Quad enhance filter for OSC. \u003cbr\u003eAlso used, Starfield 60Q telescope, QHY268C camera and iOptron HEM15 strainwave mount. \u003cbr\u003e5hr 30min total. \u003cbr\u003eImaged under 80% Moon.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/836ffc71f86d80815dc32789f9f5844a_3b0ebed0-2abc-4fd8-a18c-2fafed3ce5d0.jpg?v=1766568142\" 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\u003cu\u003e\u003cstrong\u003eVII. Shark nebula (LDN1235) © Matej Mihelčič （Slovenia） \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eShark nebula (LDN1235)\u003cbr\u003eOmegon 108Q@600m \u003cbr\u003eASI094MC\u003cbr\u003eOptolong L-Quad Enhance Filter (L-QEF) \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/974bcc3bbe7d4033d39b8a142085e4ae_c3577fbf-e55d-4b6a-85b0-2697abfab55a.png?v=1766568144\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014033567855,"sku":"L-QEF","price":260.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Quad__13258.jpg?v=1766568146"},{"product_id":"nd3-0-neutral-density-filter-1-25","title":"ND3.0 neutral density filter 1.25\"","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1.  Neutral Density Filters Introduction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNeutral Density (ND) filters are designed to reduce transmission evenly acorss a portion of a specific spectrum. ND filters are typically defined by their Optical Density (OD) which describes the amount of energy blocked by the filter. A high optical density value indicates very low transmission, and low optical density indicates high transmission (Equations 1-2). ND filters can be stacked to achieve a customs optical density. To calculate the final system OD, simply add the OD of each filter together.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypes of Neutral Density Filters\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere are two types of ND filters: reflective and absorptive.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReflective ND filters\u003c\/strong\u003e consist of thin film optical coating, typically metallic, that have been applied to a galls substrate. The coating can be optimized for specific wavelength ranges such as UV-VIS or NIR. Thin film coaitng primarily reflects light back toward the source. Special care should be taken to ensure the reflected light does not interfere with the system setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAbsorptive ND filters\u003c\/strong\u003e utlize a glass substrate to absorb light by a specific percentage.\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\u003e2. ND3.0 Filter Characteristic\u003c\/strong\u003e\u003cbr\u003eSbustrate: optical galss\u003cbr\u003eThickness: 1.85mm\u003cbr\u003eT=0.1%\u003cbr\u003eSurface quality: 60\/40\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\u003cstrong\u003e3. Coating 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 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","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014103658607,"sku":"O-ND3-1","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ND3-a__80533.jpg?v=1766571329"},{"product_id":"used-lrgb-deep-sky-imaging-filter-1-25","title":"USED LRGB Deep Sky Imaging Filter - 1.25\"","description":"\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eUSED Optolong LRGB 1.25\" Filters in excellent condition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e \u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eThe LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance. \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eFine-optically polishing for double-sides—— Ensure accurate \u003cspan style=\"color: #191f25; font-family: arial, helvetica, sans-serif; line-height: 32px; text-align: justify;\"\u003e1\/4 wavefront and \u0026lt;30 seconds parallalism over the both surfaces\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eUltrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities and dust effectively\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eIro source assisted coating—— 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 style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eConstantly stringent quality testing processes—— Each filter was tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: #ffffff;\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best servise!\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014117847151,"sku":"O-LRGB-1-U","price":275.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/IMG_1261__72659.jpg?v=1766571908"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/collections\/apim5hqho__52998.png?v=1767588112","url":"https:\/\/ontariotelescope.com\/collections\/optolong.oembed?page=2","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}