{"id":7244,"date":"2025-04-26T16:45:45","date_gmt":"2025-04-26T14:45:45","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=7244"},"modified":"2025-11-18T18:03:01","modified_gmt":"2025-11-18T17:03:01","slug":"filtre-antlia-solar-discover-5a-cak","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-antlia-solar-discover-5a-cak\/","title":{"rendered":"Antlia Solar Discover 5\u00c5 CaK filter"},"content":{"rendered":"<h3 style=\"text-align: center;\">Antlia Solar Discover 5\u00c5CaK<\/h3>\n<p>The Antlia Solar Discover 5\u00c5 CaK is a specialized optical package for solar imaging, incorporating light reduction filters to limit solar heat gain and improve safety of use. Designed to maximize the contrast of Plages, Light Bridges and sunspots on the Calcium II K line (393.3nm), it offers an ultra-narrow bandwidth of 0.5nm to capture fine details of the solar chromosphere.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-7245\" style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo.jpg\" alt=\"\" width=\"1521\" height=\"1289\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo.jpg 1521w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo-300x254.jpg 300w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo-1024x868.jpg 1024w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo-768x651.jpg 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo-14x12.jpg 14w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/5A-sample-photo-600x508.jpg 600w\" sizes=\"(max-width: 1521px) 100vw, 1521px\" \/><\/p>\n<h3>Key features<\/h3>\n<ul>\n<li>Integrated filter: ultra-narrow bandwidth 5\u00c5 (0.5nm) centered on 393.3nm<\/li>\n<li>Clear aperture: D12mm (B1200)<\/li>\n<li>Fully enclosed tube in CNC aerospace aluminum, preventing light leakage<\/li>\n<li>Effective heat reduction for safe solar imaging<\/li>\n<li>Installation similar to the Herschel CaK 3nm prism<\/li>\n<\/ul>\n<h3>Compatibility and Accessories<\/h3>\n<ul>\n<li>For use with telescopes with focal ratio &gt; f\/7 without Barlow<\/li>\n<li>Barlow 2X, 3X, and 5X for Solar Discover 5\u00c5 CaK (optional)<\/li>\n<li>Adjustable aperture diaphragm Dia 2.0mm-25mm (optional)<\/li>\n<li>Focal length extensions: 50mm and 70mm tubes available as options<\/li>\n<li>Secure installation required with additional ERF for optics &gt; 100mm aperture<\/li>\n<\/ul>\n<h3>Important notes<\/h3>\n<ul>\n<li>No additional light reduction device, limited to refractors up to 100mm aperture<\/li>\n<li>ERF required when using other brands of zenith or Barlow mirrors<\/li>\n<li>Correct installation essential for safe operation<\/li>\n<\/ul>\n<h3>Visual use<\/h3>\n<p>The CaK band (393.3nm) is almost invisible to the human eye. Solar Discover 5\u00c5 CaK is designed primarily for imaging and is not recommended for visual observation. Furthermore, the IR coverage of the filters does not correspond exactly to ISO 12312-2 standards. Any visual use should be carried out with extreme caution and only if the filters are in perfect condition.<\/p>\n<h3>Compliance with ISO standards<\/h3>\n<ul>\n<li>Tmax% (380-780nm): 0.0032%<\/li>\n<li>Tmin% (380-780nm): 0.000061%<\/li>\n<li>Tmax% UVB (280-315nm): 0.0032%<\/li>\n<li>Tmax% UVA (315-380nm): 0.0032%<\/li>\n<li>Tmax% IR (780-1700nm): 3%<\/li>\n<\/ul>\n<h3>Solar Discover options (select from drop-down menu)<\/h3>\n<ul>\n<li>Solar Discover 5\u00c5 CaK Assembly alone: USD 880<\/li>\n<li>Solar Discover 5\u00c5 CaK with Barlow 2X or 3X: 930 USD<\/li>\n<li>Solar Discover 5\u00c5 CaK with Barlow 5X: 940 USD<\/li>\n<li>Barlow 2X or 3X alone: USD 50<\/li>\n<li>Barlow 5X alone: USD 60<\/li>\n<li>Adjustable diaphragm: USD 50<\/li>\n<li>50mm extension: USD 20<\/li>\n<li>70mm extension: USD 25<\/li>\n<\/ul>\n<h3>Warranty<\/h3>\n<ul>\n<li>3-year manufacturer's warranty<\/li>\n<li><strong>Any disassembly of the assembly voids the warranty.<\/strong><\/li>\n<li>No repair, return or exchange possible in case of disassembly<\/li>\n<\/ul>\n<h3>Safety precautions<\/h3>\n<ul>\n<li><strong style=\"color: red;\">Never use without an appropriate light reduction system for apertures &gt;100mm.<\/strong><\/li>\n<li><strong style=\"color: red;\">Forbidden for unsafe visual solar observation.<\/strong><\/li>\n<li><strong style=\"color: red;\">Always check filter integrity before use.<\/strong><\/li>\n<\/ul>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Antlia Solar Discover 5\u00c5CaK Le Antlia Solar Discover 5\u00c5 CaK est un ensemble optique sp\u00e9cialis\u00e9 pour l&rsquo;imagerie solaire, incorporant des filtres de r\u00e9duction de lumi\u00e8re pour limiter l&rsquo;entr\u00e9e de chaleur solaire et am\u00e9liorer la s\u00e9curit\u00e9 d&rsquo;utilisation. Con\u00e7u pour maximiser le contraste des Plages, Light Bridges et taches solaires sur la raie Calcium II K (393.3nm), [&hellip;]<\/p>\n","protected":false},"featured_media":7248,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[642,647,645],"product_tag":[],"class_list":{"0":"post-7244","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-antlia","7":"product_cat-materiel-pour-lobservation-solaire","8":"product_cat-filtres-bloquants-ha-ou-ca-k","9":"product_cat-filtres-solaires","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-variable"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7244","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=7244"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7248"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7244"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7244"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7244"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}