{"id":7143,"date":"2025-04-26T13:41:17","date_gmt":"2025-04-26T11:41:17","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=7143"},"modified":"2025-09-17T15:41:09","modified_gmt":"2025-09-17T13:41:09","slug":"filtre-h-alpha-7nm-prime-36mm-non-monte","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-h-alpha-7nm-prime-36mm-non-monte\/","title":{"rendered":"H-alpha filter 7nm Prime - 36mm (unmounted)"},"content":{"rendered":"<h3 style=\"text-align: center;\">Antlia H-alpha 7nm Prime filter<\/h3>\n<p><strong>Treat yourself to high-precision imaging of H-alpha and NII nebulae with the Antlia 7nm Prime filter.<\/strong> Designed to excel with fast lenses up to f\/2, it combines high transmission and noise control for optimum astrophotography results.<\/p>\n<h2>Key features<\/h2>\n<ul>\n<li><strong>High transmission<\/strong> (&gt;90% at 656.3nm) to capture maximum H-alpha signal.<\/li>\n<li><strong>Bandwidth 7nm<\/strong> to efficiently transmit NII lines at 654.8nm and 658.3nm.<\/li>\n<li><strong>OD4 deletion<\/strong> out-of-band to minimize stray light interference.<\/li>\n<li><strong>Compatible with high-speed optics<\/strong> up to f\/2 without significant signal loss.<\/li>\n<li><strong>One-piece design<\/strong> to eliminate internal reflections and limit halos around bright stars.<\/li>\n<\/ul>\n<h2>Ideal applications<\/h2>\n<ul>\n<li>Imaging H-alpha and NII nebulae<\/li>\n<li>Planetary nebulae, Wolf-Rayet, supernova remnants<\/li>\n<li>Astrophotography in light-polluted areas or dark sites<\/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>H-alpha 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>656.3nm<\/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>Robust design<\/h2>\n<ul>\n<li>Optical surface treated to reduce scratching<\/li>\n<li>Blackened edges eliminate internal reflections<\/li>\n<li>Spectral profile with abrupt cut-off to reduce stellar halos<\/li>\n<\/ul>\n<h2>Safety warning<\/h2>\n<p style=\"color: red;\"><strong>Warning: never look directly at the Sun with this filter.<\/strong> This would cause serious eye damage.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre Antlia H-alpha 7nm Prime Offrez-vous une imagerie de haute pr\u00e9cision sur les n\u00e9buleuses H-alpha et NII avec le filtre Antlia 7nm Prime. Con\u00e7u pour exceller avec des optiques rapides jusqu\u2019\u00e0 f\/2, il combine haute transmission et contr\u00f4le du bruit pour un r\u00e9sultat optimal en astrophotographie. Caract\u00e9ristiques principales Transmission \u00e9lev\u00e9e (&gt;90% \u00e0 656.3nm) pour capter [&hellip;]<\/p>\n","protected":false},"featured_media":7149,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[780,801],"product_tag":[],"class_list":{"0":"post-7143","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-antlia","7":"product_cat-filtres-bande-etroite","8":"product_cat-filtre-astrophotographie-du-ciel-profond","10":"first","11":"on_supplier","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7143","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=7143"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7149"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7143"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7143"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7143"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}