{"id":7151,"date":"2025-04-26T14:05:01","date_gmt":"2025-04-26T12:05:01","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=7151"},"modified":"2025-09-17T15:41:09","modified_gmt":"2025-09-17T13:41:09","slug":"filtre-sii-7nm-prime-36mm-non-monte","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-sii-7nm-prime-36mm-non-monte\/","title":{"rendered":"SII 7nm Prime filter - 36mm (unmounted)"},"content":{"rendered":"<h3 style=\"text-align: center;\">Antlia SII 7nm Prime filter<\/h3>\n<p><strong>Capture low-level ionized sulfur emissions with precision thanks to the Antlia SII 7nm Prime filter.<\/strong> With high transmission and excellent suppression of light interference, this filter is optimized for deep-sky astrophotography, even with fast lenses up to f\/2.<\/p>\n<h2>Key features<\/h2>\n<ul>\n<li><strong>High transmission<\/strong> (&gt;90% at 672.4nm) for maximum signal from SII nebulae.<\/li>\n<li><strong>Bandwidth 7nm<\/strong> to efficiently pick up SII lines at 671.6nm and 673.1nm.<\/li>\n<li><strong>OD4 deletion<\/strong> parasitic wavelengths for a better signal-to-noise ratio.<\/li>\n<li><strong>Compatible with high-speed optics<\/strong> up to f\/2 without any noticeable loss of performance.<\/li>\n<li><strong>Spectral profile with abrupt cut-off<\/strong> to minimize halos around bright stars.<\/li>\n<\/ul>\n<h2>Ideal applications<\/h2>\n<ul>\n<li>Imaging SII emission nebulae<\/li>\n<li>Observation of planetary nebulae, Wolf-Rayet and supernova remnants<\/li>\n<li>Deep-sky photography and polluted areas<\/li>\n<\/ul>\n<h2>Technical specifications<\/h2>\n<table>\n<thead>\n<tr>\n<th>Features<\/th>\n<th>Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Type<\/td>\n<td>SII 7nm Prime<\/td>\n<\/tr>\n<tr>\n<td>FWHM (Full Width at Half Maximum)<\/td>\n<td>7nm<\/td>\n<\/tr>\n<tr>\n<td>Center wavelength (CWL)<\/td>\n<td>672.4nm<\/td>\n<\/tr>\n<tr>\n<td>Maximum transmission<\/td>\n<td>&gt;90%<\/td>\n<\/tr>\n<tr>\n<td>Out-of-band blocking<\/td>\n<td>OD4 (0.01%) between 300-1000nm<\/td>\n<\/tr>\n<tr>\n<td>Thickness<\/td>\n<td>2mm \u00b1 0.05mm<\/td>\n<\/tr>\n<tr>\n<td>Substrate<\/td>\n<td>Unglued monoblock optical glass<\/td>\n<\/tr>\n<tr>\n<td>Surface quality<\/td>\n<td>S\/D 60\/40 (MIL-O-13830 standard)<\/td>\n<\/tr>\n<tr>\n<td>Transmitted wavefront<\/td>\n<td>\u03bb\/4 or better<\/td>\n<\/tr>\n<tr>\n<td>Parallelism<\/td>\n<td>&lt;30 arcsec<\/td>\n<\/tr>\n<tr>\n<td>Warranty<\/td>\n<td>3 years against delamination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Available formats<\/h2>\n<ul>\n<li>Unmounted: \u00d836mm<\/li>\n<\/ul>\n<h2>Design and benefits<\/h2>\n<ul>\n<li>Use of a single substrate to avoid internal reflections<\/li>\n<li>Surface treated to reduce scratching<\/li>\n<li>Blackened edges to eliminate stray reflections<\/li>\n<li>Optimized for deep-sky viewing, even in bright environments<\/li>\n<\/ul>\n<h2>Safety warning<\/h2>\n<p style=\"color: red;\"><strong>Warning: never observe the Sun with this filter.<\/strong> This would cause serious, irreversible eye damage.<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre Antlia SII 7nm Prime Capturez les faibles \u00e9missions de soufre ionis\u00e9 avec pr\u00e9cision gr\u00e2ce au filtre Antlia SII 7nm Prime. Avec une haute transmission et une excellente suppression des interf\u00e9rences lumineuses, ce filtre est optimis\u00e9 pour l&rsquo;astrophotographie du ciel profond, m\u00eame avec des optiques rapides jusqu\u2019\u00e0 f\/2. Caract\u00e9ristiques principales Transmission \u00e9lev\u00e9e (&gt;90% \u00e0 672.4nm) [&hellip;]<\/p>\n","protected":false},"featured_media":7155,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[780,801],"product_tag":[],"class_list":["post-7151","product","type-product","status-publish","has-post-thumbnail","product_brand-antlia","product_cat-filtres-bande-etroite","product_cat-filtre-astrophotographie-du-ciel-profond","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7151","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=7151"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7155"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7151"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7151"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7151"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}