{"product_id":"optolong-l-enhance-duo-band-filter","title":"Optolong L-eNhance Duo Band Filter","description":"\u003ch1\u003eOptolong L-eNhance Duo Band Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur 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. The filter is available in the following sizes: 1.25″, 2″ \u0026amp; clip filter for Canon EOS. The clip version is compatible with all Canon EF lenses, but doesn’t suit Canon EF-S lenses. The following cameras are compatible: 7D2, 80D, 800D, 77D, 70D, 760D, 750D, 700D, 650D, 600D, 550D, 500D, 400D, 100D, 1100D, 1200D \u0026amp; 1300D.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Optolong L-eNhance Filterprovides 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 monochrome 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. Optolong 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\/p\u003e\n\u003cp data-mce-fragment=\"1\"\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.\u003cbr data-mce-fragment=\"1\"\u003eTherefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable for visual observation and astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\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\/p\u003e\n\u003cp data-mce-fragment=\"1\"\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\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem\u003e\u003cstrong\u003eL-Enhance Performance\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/48c07ebe8a88353aa27c0031c7e973d0.png?width=700\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSbustrate:\u003c\/em\u003e B270\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cem\u003eThickness:\u003c\/em\u003e 1.85mm\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTpeak:\u003c\/em\u003e  T\u0026gt;90%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking range:\u003c\/em\u003e 300-1000nm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking depth:\u003c\/em\u003e light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSurface quality:\u003c\/em\u003e 60\/40\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTransmitted Wavefront RMS:\u003c\/em\u003e λ\/4\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eParallelism:\u003c\/em\u003e 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMajor Emission Lines of Nebulae : \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-Alpha : 656.3nm\u003c\/li\u003e\n\u003cli\u003eH-Beta : 486.1nm\u003c\/li\u003e\n\u003cli\u003eOIII : 495.nm \u0026amp; 500.7 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOptolong 3-Years Warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":54478568882460,"sku":"hkk1787937179967","price":133.7,"currency_code":"USD","in_stock":true},{"title":"2\"","offer_id":54478568915228,"sku":"wbe1787937179968","price":154.94,"currency_code":"USD","in_stock":true},{"title":"EOS-C Clip","offer_id":54478568947996,"sku":"wcr1787937179969","price":175.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/7950\/4156\/files\/optolong-l-enhance-duo-band-filter_1.webp?v=1787937184","url":"https:\/\/www.lanternandloom.shop\/products\/optolong-l-enhance-duo-band-filter","provider":"My Store","version":"1.0","type":"link"}