{"id":3947,"date":"2025-03-06T20:51:24","date_gmt":"2025-03-06T19:51:24","guid":{"rendered":"https:\/\/deep-space-astronomy.geekworkers.dev\/produit\/filtre-chroma-oiii-3nm-optimise-pour-f-d-entre-2-8-et-3-6\/"},"modified":"2025-06-03T10:41:19","modified_gmt":"2025-06-03T08:41:19","slug":"filtre-chroma-oiii-3nm-optimise-pour-f-d-entre-2-8-et-3-6","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-chroma-oiii-3nm-optimise-pour-f-d-entre-2-8-et-3-6\/","title":{"rendered":"Chroma OIII filter 3nm ( 2.8 &lt; f\/d &lt; 3.6) - 2&quot; Mounted"},"content":{"rendered":"<h3>Chroma OIII 3nm filter<\/h3>\n<p>Visit <strong>Chroma OIII 3nm filter<\/strong> optimized for fast focal ratios between f\/2.8 and f\/3.6 is a precision tool designed for narrow-band astronomical imaging. This filter isolates the emission line of doubly ionized oxygen (OIII) at 500.7 nm, essential for capturing the details of planetary nebulae, supernova remnants and HII regions.<\/p>\n<h4>Key features<\/h4>\n<ul>\n<li><strong>Ultra-narrow bandwidth of 3 nm<\/strong>OIII: Allows precise isolation of the OIII line at 500.7 nm, while effectively blocking unwanted wavelengths such as those from light pollution or natural night-time emissions.<\/li>\n<li><strong>Optimized for high-speed systems (f\/2.8 to f\/3.6)<\/strong>Designed to compensate for the blueshift that occurs with high-speed optics.<\/li>\n<li><strong>Exceptional transmission<\/strong>Transmission of up to 90 % at 500.7 nm, for optimum signal-to-noise ratio and detailed images.<\/li>\n<li><strong>Robust construction<\/strong>Multilayer sputter coatings for exceptional durability and long-term spectral stability.<\/li>\n<li><strong>High-quality optical glass substrate<\/strong>Surface accuracy of \u03bb\/4, reducing optical aberrations.<\/li>\n<\/ul>\n<h4>Applications<\/h4>\n<ul>\n<li><strong>Imaging ionized oxygen-rich nebulae<\/strong>Ideal for capturing the complex structures of planetary nebulae and supernova remnants (e.g. the Veil Nebula).<\/li>\n<li><strong>Essential complement to H-alpha and SII filters<\/strong>To create SHO (Hubble) palette images.<\/li>\n<li><strong>Reducing light pollution<\/strong>Blocks wavelengths from sodium and mercury lamps, as well as atmospheric luminescence.<\/li>\n<li><strong>Advanced astrophotography with high-speed systems<\/strong>Compatible with modern CCD and CMOS cameras, optimizing performance on fast telescopes such as HyperStar or RASA systems.<\/li>\n<\/ul>\n<h4>Technical advantages<\/h4>\n<ul>\n<li><strong>Universal compatibility<\/strong>Available in mounted (1.25\", 2\") and unmounted (31 mm, 36 mm) formats, to suit a wide range of filter wheels and optical configurations.<\/li>\n<li><strong>Anti-glare design<\/strong>Anti-reflective coatings on both sides to eliminate halos around bright stars.<\/li>\n<li><strong>Guaranteed spectral accuracy<\/strong>: Each filter is individually tested to ensure performance to exacting specifications.<\/li>\n<\/ul>\n<h4>Conclusion<\/h4>\n<p>Visit <strong>Chroma OIII 3nm filter<\/strong> optimized for f\/2.8 to f\/3.6 is an essential tool for astrophotographers using fast optical systems. Its ultra-narrow bandwidth, exceptional transmission and blueshift optimization guarantee images rich in detail and unrivalled contrast, even under polluted skies.<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre Chroma OIII 3nm Le filtre Chroma OIII 3nm optimis\u00e9 pour des rapports focaux rapides entre f\/2.8 et f\/3.6 est un outil de pr\u00e9cision con\u00e7u pour l\u2019imagerie astronomique \u00e0 bande \u00e9troite. Ce filtre isole la raie d\u2019\u00e9mission de l\u2019oxyg\u00e8ne doublement ionis\u00e9 (OIII) \u00e0 500,7 nm, essentielle pour capturer les d\u00e9tails des n\u00e9buleuses plan\u00e9taires, des restes [&hellip;]<\/p>\n","protected":false},"featured_media":3864,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[582],"product_cat":[780],"product_tag":[],"class_list":["post-3947","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\/3947","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=3947"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/3864"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=3947"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=3947"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=3947"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=3947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}