{"product_id":"optolong-l-enhance-deep-sky-light-pollution-filter-2","title":"Optolong L-eNhance Dual Narrowband Filter - 2\"","description":"The L-enhance Filter is a Tri-band filter, perfect for deep sky nebula photography from the city as it uses tight narrowband limits - blocking out unwanted glow from the city. The relentless spread or urbanization and its associated light pollution have become a big problem for all amateur astro photographers around the world. One solution is to purchase a Mono camera but this can be expensive and might also require the purchase of several types of narrowband filters and a filter wheel.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThese filters open up a whole new opportunity for fast newtonian telescopes, double-lens ED refractors or even achromats, allowing for extremely detailed and high class astronomical images even from heavy light polluted cities as it blocks out all artificial light pollution sources as it is a Tri-bandpass filter, only allowing for the wavelengths of O-III, H-Beta \u0026amp; H-Alpha.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eL-eNhance provides an economical and practical solution for amateurs using DSLR or color CMOS and monochrome CCD cameras. The convenience and cost-effectiveness of this filter allows amateurs to take detailed astronomical images, even in bright, heavily light-polluted areas thanks to its maximum transmission lines of up to 90%. The narrow bandpass for the wavelengths of O-III, H-Beta and H-Alpha really help control the impact from light polluted skies.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eL-eNhance has a multiple anti-reflective coating on the optical substrate which uses a precision coating based on ion deposition coating technology. This ensures durability and scratch resistance as well as stability on the CWL (central wavelength), which is not affected by temperature changes.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cem\u003eIMPORTANT WARNING: These nebula filters are NOT designed for observation of the Sun. Do not use this filter to look at the Sun as serious eye damage, blindness as well as damage to equipment may result.\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional photographic filter for astronomy\u003c\/li\u003e\n\u003cli\u003eImproves deep sky emission nebula photography\u003c\/li\u003e\n\u003cli\u003eBest choice for enhanced light pollution suppression\u003c\/li\u003e\n\u003cli\u003eFor taking pictures also from highly light polluted areas\u003c\/li\u003e\n\u003cli\u003eTri-band filter with high transmission for O-III, H-Beta and H-Alpha lines\u003c\/li\u003e\n\u003cli\u003eDoes not require very large or extremely expensive telescopes\u003c\/li\u003e\n\u003cli\u003eExcellent results also with inexpensive newtonian telescopes, double-lens ED refractors or even achromats\u003c\/li\u003e\n\u003cli\u003eCMOS colour cameras can deliver an image quality that comes close to CCD monochrome cameras\u003c\/li\u003e\n\u003cli\u003eBalanced colour for a natural image\u003c\/li\u003e\n\u003cli\u003eFilter diameter: 2 inch\u003c\/li\u003e\n\u003cli\u003eConnecting thread: M28,5 x 0,6mm (Eyepiece thread 1.25 inch)\u003c\/li\u003e\n\u003cli\u003eSelected optical glass material\u003c\/li\u003e\n\u003cli\u003eSpectrum: 300-1000nm\u003c\/li\u003e\n\u003cli\u003eOff-Band Blocking: \u0026gt; 99%\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront and highest parallelism over the both surfaces\u003c\/li\u003e\n\u003cli\u003eHigh transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm\u0026amp;500nm and H-beta 486nm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cem\u003eWhats included:\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003col\u003e\n\u003cli\u003eL-eNhance 2\" filter\u003c\/li\u003e\n\u003cli\u003eDust protection box\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":40683842339011,"sku":"L-eXtreme2","price":355.89,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/1924\/6275\/products\/OptolongL-Enhance2_2.jpg?v=1631720499","url":"https:\/\/www.horizonastronomy.ie\/en-ro\/products\/optolong-l-enhance-deep-sky-light-pollution-filter-2","provider":"Horizon Astronomy • Telescope Center","version":"1.0","type":"link"}