{"product_id":"explore-scientific-2-s-ii-filtro-de-nebulosa-12nm","title":"EXPLORE SCIENTIFIC 2\" S-II 12nm Nebular Filter","description":"\u003cdiv\u003eOne of the most significant obstacles to exploring the night sky\n is illumination from artificial lights, such as\n streetlights. The night sky is not truly dark near towns\n or cities, which greatly reduces the visibility of objects beyond the\n solar system. Depending on the type of celestial object, \u003cb\u003eit is\n possible to dramatically increase contrast by\u003c\/b\u003e \u003cb\u003eblocking interfering artificial light\u003c\/b\u003e. \u003cbr\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eThe \u003cb\u003eEXPLORE SCIENTIFIC S-II\u003c\/b\u003e filter utilizes the property of so-called emission nebulae. These objects glow with specific colors, called emission lines. Emission lines are associated with specific chemical elements, in this case, ionized sulfur. The \u003cb\u003eEXPLORE SCIENTIFIC S-II\u003c\/b\u003e nebula filter blocks all other colors (and thus almost all artificial light) and \u003cb\u003eonly allows the emission lines of ionized sulfur at 672 nm to pass through.\u003c\/b\u003e The effect is astonishing: suddenly, nebulae become visible in places that appear completely empty without the filter. In lightly polluted skies, \u003cb\u003emany planetary nebulae, emission nebulae, and supernova remnants\u003c\/b\u003e can be seen without any difficulty with this filter. \u003cb\u003eA must-have for every visual observer and for astrophotography.\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eEXPLORE SCIENTIFIC nebula filters come with an individual test report that ensures you receive high-quality filters.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cbr\u003eFEATURES\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eSimplifies the observation of planetary nebulae, emission nebulae, and supernova remnants\u003c\/li\u003e\n\u003cli\u003eBlocks almost all artificial light\u003c\/li\u003e\n\u003cli\u003eOnly allows the emission lines of ionized sulfur at 672 nm to pass through\u003c\/li\u003e\n\u003cli\u003eTransmission bandwidth: 12 nm\u003c\/li\u003e\n\u003cli\u003eAllows for greater contrast in faint deep-sky objects\u003c\/li\u003e\n\u003cli\u003eIdeal for use near cities, in lightly polluted skies\u003c\/li\u003e\n\u003cli\u003eIndividual test certificate included as a guarantee that you receive a premium filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cb\u003eINCLUDES\u003c\/b\u003e\u003cul\u003e\u003cli\u003e1 S-II 2'' nebula filter\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52791591043415,"sku":"310110","price":156.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/0310110_M1_2021.jpg?v=1770989642","url":"https:\/\/astrotelescopios.com\/en-efta\/products\/explore-scientific-2-s-ii-filtro-de-nebulosa-12nm","provider":"Astro Telescopios","version":"1.0","type":"link"}