{"product_id":"optolong-l-extreme-dual-band-filter-1-25","title":"Optolong  L-eXtreme Dual Band Filter - 1.25\"","description":"\u003cp\u003eThe L-eXtreme from Optolong is a dual band filter that passes Ha and OIII emission lines.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe advantage of the L-eXtreme filter over the L-eNhance, which is a tri-band filter,  is that there are 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 maximizes a nebula's signal and makes the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and provide better protection from light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eSubstrate: B270\u003cbr\u003eThickness: 1.85mm\u003cbr\u003eTpeak:  T\u0026gt;90%\u003cbr\u003eBlocking Range: 300-1000nm\u003cbr\u003eBlocking Depth: Light pollution line blocking \u0026gt;99%\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":40462405599345,"sku":"OPTO-L-EXTREME-125","price":223.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/L-extreme_125.jpg?v=1776459217","url":"https:\/\/khanscope.com\/en-fr\/products\/optolong-l-extreme-dual-band-filter-1-25","provider":"Khan Scope Centre","version":"1.0","type":"link"}