{"id":7157,"date":"2025-04-26T14:17:39","date_gmt":"2025-04-26T12:17:39","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=7157"},"modified":"2026-06-05T16:17:40","modified_gmt":"2026-06-05T14:17:40","slug":"filtre-antlia-alp-t-dualband-5nm-ha-et-oiii-2-monte","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-antlia-alp-t-dualband-5nm-ha-et-oiii-2-monte\/","title":{"rendered":"2\u2033 Antlia ALP-T Dualband 5nm Ha and OIII filter"},"content":{"rendered":"<h3 style=\"text-align: center;\">Antlia ALP-T Dual Band 5nm Ha&amp;OIII filter<\/h3>\n<p><strong>Capture H-alpha and OIII nebulae simultaneously with the Antlia ALP-T Dual Band 5nm filter.<\/strong> Ideal for color cameras (OSC) and equally effective for monochrome sensors, this filter maximizes contrast while drastically reducing light pollution.<\/p>\n<h2>Key features<\/h2>\n<ul>\n<li><strong>Double band<\/strong> Simultaneous transmission of H-alpha (656.3nm) and OIII (500.7nm) lines.<\/li>\n<li><strong>Ultra-tight FWHM<\/strong> of 5nm for each band, increasing contrast.<\/li>\n<li><strong>Delete OD4.5<\/strong> undesirable wavelengths (light pollution, sky glow, moonlight).<\/li>\n<li><strong>OSC and monochrome compatible<\/strong>perfect for DSLR, CMOS and CCD cameras.<\/li>\n<li><strong>Ion Gun Assisted Deposition coating technology<\/strong> for maximum spectrum and transmission stability.<\/li>\n<li><strong>Near infrared (NIR) rejection<\/strong> up to 1100nm for optimum image quality.<\/li>\n<\/ul>\n<h2>Ideal applications<\/h2>\n<ul>\n<li>Astrophotography of emission nebulae (H-alpha and OIII)<\/li>\n<li>Working in light-polluted environments (Bortle 5 to Bortle 8)<\/li>\n<li>Photographic sessions under the presence of the Moon<\/li>\n<li>Use with high-speed optics without significant signal degradation<\/li>\n<\/ul>\n<h2>Technical specifications<\/h2>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Hydrogen-alpha<\/th>\n<th>Oxygen III<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>FWHM<\/td>\n<td>5nm<\/td>\n<td>5nm<\/td>\n<\/tr>\n<tr>\n<td>Center wavelength (CWL)<\/td>\n<td>656.3nm<\/td>\n<td>500.7nm<\/td>\n<\/tr>\n<tr>\n<td>Maximum transmission<\/td>\n<td>92%<\/td>\n<td>88%<\/td>\n<\/tr>\n<tr>\n<td>Out-of-band blocking<\/td>\n<td colspan=\"2\">\u2265OD4.5 from 300 to 1100nm<\/td>\n<\/tr>\n<tr>\n<td>Filter thickness<\/td>\n<td colspan=\"2\">2mm \u00b1 0.05mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Available formats and indicative prices<\/h2>\n<ul>\n<li>Mounted 2\" (M48x0.75): USD 380<\/li>\n<li>Unmounted \u00d836mm (B-4836 adapter included): USD 298<\/li>\n<li>Other sizes: availability to be confirmed<\/li>\n<\/ul>\n<h2>Filter design<\/h2>\n<ul>\n<li>Ultra-thin cell to reduce vignetting<\/li>\n<li>Black anodized finish<\/li>\n<li>Weather-resistant laser engraving<\/li>\n<\/ul>\n<h2>Field-proven performance<\/h2>\n<p>The Antlia ALP-T 5nm filter has been tested on a number of well-known deep-sky targets:<\/p>\n<ul>\n<li>IC434 (Horsehead Nebula) - 24 exposures of 300s each<\/li>\n<li>NGC2244 (Rosette Nebula) - 30 exposures of 300s each<\/li>\n<li>NGC6960 (Western Veil Nebula) - 7 exposures of 300s each<\/li>\n<li>IC63 (Cassiopeia Phantom) - 32 exposures of 300s each<\/li>\n<li>Betelgeuse and Aldebaran (magnitude tests)<\/li>\n<\/ul>\n<p>All images taken under a Bortle 5 sky with a Skywatcher 130mm f\/5 + MPCC corrector, Losmandy G11 mount, IMX571 camera.<\/p>\n<h2>Safety warning<\/h2>\n<p style=\"color: red;\"><strong>Never use this filter to observe the Sun.<\/strong> This could cause serious eye damage.<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre Antlia ALP-T Dual Band 5nm Ha&amp;OIII Capturez les n\u00e9buleuses H-alpha et OIII simultan\u00e9ment gr\u00e2ce au filtre Antlia ALP-T Dual Band 5nm. Id\u00e9al pour les cam\u00e9ras couleur (OSC) et \u00e9galement performant pour les capteurs monochromes, ce filtre maximise le contraste tout en r\u00e9duisant drastiquement la pollution lumineuse. Caract\u00e9ristiques principales Double bande : transmission simultan\u00e9e des [&hellip;]<\/p>\n","protected":false},"featured_media":7165,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[780,803],"product_tag":[],"class_list":["post-7157","product","type-product","status-publish","has-post-thumbnail","product_brand-antlia","product_cat-filtres-bande-etroite","product_cat-filtres-multi-bandes","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7157","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=7157"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7165"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7157"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7157"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7157"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}