{"title":"Multi-Band fitlers","description":"\u003cp data-start=\"0\" data-end=\"74\"\u003eOptolong’s multiband filters — such as the L-eNhance, L-eXtreme, and L-Ultimate — bring versatile, high-performance light pollution suppression to one-shot color cameras and complete imaging setups. By selectively passing key nebula emission lines (H-alpha, H-beta, OIII) while blocking unwanted skyglow and artificial light, these filters deliver cleaner, more vivid deep-sky images with enhanced contrast and color detail even under bright or suburban skies. For astrophotographers seeking a flexible solution without switching to monochrome, multiband filters offer an excellent balance of convenience and image-quality improvements.\u003c\/p\u003e","products":[{"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":259.99,"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":329.99,"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-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":439.99,"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":339.99,"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":369.99,"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-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-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":449.99,"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":"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":289.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Quad__13258.jpg?v=1766568146"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/collections\/d62b322b6111da8844ae75c560dd0a8e__19544.jpg?v=1767588640","url":"https:\/\/ontariotelescope.com\/collections\/multi-band-fitlers.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}