{"product_id":"optolong-l1-l-quad-l-para-enhence-filter-set-l1","title":"Optolong L1 L-Quad \u0026 L-Para Enhence Filter Set (L1-SET)","description":"\u003ch1\u003eOptolong L1 L-Quad \u0026amp; L-Para Enhence Filter Set\u003c\/h1\u003e\n\u003cp\u003eL1 Dual -Combo Set includes：one L-Quad Enhance Filter and one L-Para L-Quad Enhance Filter：Quad bandpass broadband filter , This filter provides better color balance while improving resistance of light pollution. It is suitable for a wide range of imaging targets, including continuous spectrum objects (RGB) such as nebulae, galaxies, and star clusters. This filter maximizes the preservation of RGB color balance in broadband spectrum targets like nebulae and galaxies, effectively improving con \u003c\/p\u003e\n\u003ch2\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/products\/optolong-l-enhance-filter?_pos=4\u0026amp;_sid=08b680de8\u0026amp;_ss=r\" target=\"_blank\"\u003eL-Quad Enhance Filter\u003c\/a\u003e\u003c\/h2\u003e\n\u003cp\u003eQuad bandpass broadband filter ,  This filter provides better color balance while improving resistance of light pollution. It is suitable for a wide range of imaging targets, including continuous spectrum objects (RGB) such as nebulae, galaxies, and star clusters. This filter maximizes the preservation of RGB color balance in broadband spectrum targets like nebulae and galaxies, effectively improving contrast and detail to render subjects more vivid and three-dimensional.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_1024x1024.jpg?v=1758301649\"\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003ca href=\"https:\/\/istronomyplus.com\/products\/optolong-l-para-10nm-dual-narrowband-light-pollution-filter-lpar-200?_pos=2\u0026amp;_sid=08b680de8\u0026amp;_ss=r\" rel=\"noopener\" target=\"_blank\"\u003eL-Para\u003c\/a\u003e\u003c\/h2\u003e\n\u003cp\u003eA dual narrowband 10nm filter  ,in systems with a focal ratio of F2 and above, the transmittance of nebula emission lines OIII and Ha exceed 85%, with excellent contrast and Anti-Halo characteristics . This filter suitable for all telescope systems, adaptable to fast optics (focal ratios of F2, F2.8, F3.2, F4) as well as various standard\/normal focal ratio telescopes. Ideal for capturing Hα \u0026amp; OIII signals in celestial objects, this filter enhances image contrast and reveals richer details in Hα \u0026amp; OIII emissions.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9b96104f725faacefa9ded926bfab8da_70c51161-6868-41ef-89ce-6603d4232bf9_1024x1024.png?v=1758301713\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2700143340459da0e3aa3e900c9c60f4_d78ac1cf-a484-4232-ab8c-af8e272a4efa_1024x1024.png?v=1758301754\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ec92b95b51a57afdfb563adfcf710c88_5fb714e0-720c-485c-a1cc-0fc1cb431ece_1024x1024.png?v=1758301769\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003e1+1\u0026gt;2 features\u003c\/h2\u003e\n\u003cp\u003e“Broadband + Narrowband” synergy engineered for precision and colour fidelity,achieves precise signal capture and color optimization for astrophotography\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eL-Quad Enhance Filter:\u003c\/strong\u003e\u003c\/span\u003e Quad bandpass broadband filter captures the RGB signals of celestial targets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eL-Para :\u003c\/strong\u003e\u003c\/span\u003e Dual narrowband 10nm filter selectively acquires Hα and OIII emission lines, revealing fine filamentary structures and the detailed morphology of ionised gas in deep-sky objects. After post-processing,photographers can effortlessly obtain fused images combining RGB with Hα \u0026amp; OIII data. This \"Broadband-Narrowband Synergy\" solution delivers more vibrant color rendition while accentuating subtle signal details, unlocking innovative approaches for astrophotography and enhancing the creative possibilities of color camera imaging. It pioneers new artistic dimensions, transforming the deep-sky photography process into a more technically engaging and visually rewarding experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCoating Technology\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\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\/li\u003e\n\u003cli\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\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eL-Quad Enhance 2\"\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission (Tpeak)\u003c\/td\u003e\n\u003ctd\u003eT \u0026gt; 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e300 – 1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eLight pollution line blocking \u0026gt; 99%\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\u003eParallelism\u003c\/td\u003e\n\u003ctd\u003e30″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_1024x1024.jpg?v=1758301649\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eL-Para 2\"\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eInfo\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBroad Compatibility\u003c\/td\u003e\n\u003ctd\u003eWorks with all telescope systems, including fast optics (F2–F4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Pollution Resistance\u003c\/td\u003e\n\u003ctd\u003eBlocks mercury, sodium, LED lines; effective under Bortle 1–7 skies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Transmission Rate\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;85% for OIII \u0026amp; Hα (at F2 and above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExcellent Contrast\u003c\/td\u003e\n\u003ctd\u003eHigh nebula transmission + strong light pollution cut-off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Halo Characteristics\u003c\/td\u003e\n\u003ctd\u003eOptimized design, tested for improved anti-halo on bright stars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9b96104f725faacefa9ded926bfab8da_70c51161-6868-41ef-89ce-6603d4232bf9_1024x1024.png?v=1758301713\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2700143340459da0e3aa3e900c9c60f4_d78ac1cf-a484-4232-ab8c-af8e272a4efa_1024x1024.png?v=1758301754\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ec92b95b51a57afdfb563adfcf710c88_5fb714e0-720c-485c-a1cc-0fc1cb431ece_1024x1024.png?v=1758301769\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\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\u003ctable style=\"width: 100.044%; height: 78.4px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003cth style=\"width: 40.0348%; height: 39.2px;\"\u003eThe Major Emission Lines of Nebulae\u003c\/th\u003e\n\u003cth style=\"width: 56.8783%; height: 39.2px;\"\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 40.0348%; height: 19.6px;\"\u003eH-α 656.3 nm  H-β 486.1 nm\u003c\/td\u003e\n\u003ctd style=\"width: 56.8783%; height: 19.6px;\"\u003eHg 435.8 nm  546.1 nm  577 nm  578.1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 40.0348%; height: 19.6px;\"\u003eOIII 495.9 nm  OIII 500.7 nm\u003c\/td\u003e\n\u003ctd style=\"width: 56.8783%; height: 19.6px;\"\u003eNa 598 nm  589.6 nm  615.4 nm  616.1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eL-Quad Enhence Filter - 2\"\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eL-Para Filter - 2\"\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":47759264579813,"sku":"OPT-L1-SET","price":557.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Optolong-L1-Dual-Combo-Set_1200x1200_9dc91923-6a0e-4cd2-ae46-30fb0d90f7fb.webp?v=1758302755","url":"https:\/\/istronomyplus.com\/products\/optolong-l1-l-quad-l-para-enhence-filter-set-l1","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}