{"id":3884,"date":"2025-03-06T20:41:32","date_gmt":"2025-03-06T19:41:32","guid":{"rendered":"https:\/\/deep-space-astronomy.geekworkers.dev\/produit\/filtre-chroma-h-beta-3nm-ultra\/"},"modified":"2025-06-03T10:40:49","modified_gmt":"2025-06-03T08:40:49","slug":"filtre-chroma-h-beta-3nm-ultra","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-chroma-h-beta-3nm-ultra\/","title":{"rendered":"Chroma H-beta 3nm Ultra filter - 2\u2033 mounted"},"content":{"rendered":"<h3>H-beta 3nm filter from Chroma Technology<\/h3>\n<p>Visit <strong>3nm H-beta filter from Chroma Technology<\/strong> is an ultra-narrow band filter designed for astronomical imaging. It is specifically optimized to capture the H-beta line at 486.1 nm, ideal for nebulae and other objects rich in ionized hydrogen. This filter is particularly well-suited to astrophotographers wishing to obtain detailed, high-contrast images, even under conditions of light pollution.<\/p>\n<h4>Key features<\/h4>\n<ul>\n<li><strong>Bandwidth :<\/strong> 3 nm, enabling extremely precise isolation of the H-beta line while effectively blocking unwanted wavelengths.<\/li>\n<li><strong>High transmission :<\/strong> Up to 90 % at 486.1 nm, guaranteeing an excellent signal-to-noise ratio.<\/li>\n<li><strong>Optical quality :<\/strong>\n<ul>\n<li>Surface polished to an accuracy of \u03bb\/4.<\/li>\n<li>Multi-layer anti-reflective coatings to avoid halos and stray reflections.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Available formats :<\/strong>\n<ul>\n<li>Assembled: 1.25\" and 2\".<\/li>\n<li>Unmounted: Custom formats available.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Substrate thickness :<\/strong> Approx. 3 mm, guaranteeing exceptional durability.<\/li>\n<\/ul>\n<h4>Applications<\/h4>\n<ul>\n<li><strong>Imaging specific nebulae :<\/strong>\n<ul>\n<li>Ideal for capturing objects like the Horsehead Nebula or the California Nebula, which emit strongly in the H-beta line.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Reducing light pollution :<\/strong>\n<ul>\n<li>Effectively blocks artificial light sources (sodium and mercury lamps) and sky background light.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Advanced astrophotography :<\/strong>\n<ul>\n<li>Ideal complement to H-alpha and OIII filters for creating false color or scientific palette images.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Compatibility with high-speed systems :<\/strong>\n<ul>\n<li>Works perfectly with focal ratios up to f\/4.0. For faster systems (f\/2.6 to f\/3.6), an optimized version may be required.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Technical highlights<\/h4>\n<ul>\n<li><strong>Exceptional durability :<\/strong>\n<ul>\n<li>Sputtered hard coatings guarantee long-term spectral stability.<\/li>\n<li>Resistant to extreme variations in temperature and humidity.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Anti-halos design :<\/strong> Anti-reflective coatings eliminate halos around bright stars, delivering sharp, detailed images.<\/li>\n<li><strong>Universal compatibility :<\/strong>\n<ul>\n<li>Fits most filter wheels and drawers on the market (ZWO EFW, QHY CFW, etc.).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Conclusion<\/h4>\n<p>The filter <strong>Chroma H-beta 3nm<\/strong> is an indispensable tool for astrophotographers seeking to capture the subtle details of nebulae rich in ionized hydrogen. Its optical precision, high transmission and ability to effectively reduce light pollution make it a top-of-the-range choice for deep-sky imaging.<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre H-beta 3nm de Chroma Technology Le filtre H-beta 3nm de Chroma Technology est un filtre \u00e0 bande ultra-\u00e9troite con\u00e7u pour l\u2019imagerie astronomique. Il est sp\u00e9cifiquement optimis\u00e9 pour capturer la raie H-beta \u00e0 486,1 nm, id\u00e9ale pour les n\u00e9buleuses et autres objets riches en hydrog\u00e8ne ionis\u00e9. Ce filtre est particuli\u00e8rement adapt\u00e9 aux astrophotographes souhaitant obtenir [&hellip;]<\/p>\n","protected":false},"featured_media":3883,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[582],"product_cat":[780],"product_tag":[],"class_list":["post-3884","product","type-product","status-publish","has-post-thumbnail","product_brand-chroma","product_cat-filtres-bande-etroite","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/3884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=3884"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/3883"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=3884"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=3884"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=3884"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=3884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}