{"id":13662,"date":"2026-02-24T11:59:18","date_gmt":"2026-02-24T10:59:18","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=13662"},"modified":"2026-04-15T11:00:56","modified_gmt":"2026-04-15T09:00:56","slug":"ls40fha-double-stack-pour-ls40tha","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/ls40fha-double-stack-pour-ls40tha\/","title":{"rendered":"LS40FHa: Double Stack for LS40THa (New standard \u2264 0.35 \u00c5)"},"content":{"rendered":"<h2>Double Stack 40mm filter for LS40THa<\/h2>\n<p>\nVisit <strong>Double Stack 40 mm filter<\/strong> is specially designed for <strong>LS40THa<\/strong> to significantly increase contrast in H-alpha solar observation. By adding a second standard, the system's effective bandwidth is reduced, improving spectral selectivity and revealing more detail on the Sun's surface.\n<\/p>\n<hr>\n<h3>Why add a Double Stack to an LS40?<\/h3>\n<ul>\n<li>H-alpha bandwidth reduction<\/li>\n<li>Significantly increased contrast on the solar disk<\/li>\n<li>More pronounced filaments<\/li>\n<li>Better-defined active ranges<\/li>\n<\/ul>\n<p>\nIn single-standard configuration, the protuberances are luminous and spectacular. At <strong>Double Stack<\/strong>, The contrast of the solar disk is enhanced, highlighting fine chromospheric structures.\n<\/p>\n<hr>\n<h3>Compatibility<\/h3>\n<ul>\n<li><strong>LS40THa<\/strong><\/li>\n<\/ul>\n<p>\nThe module mounts on the front of the compatible instrument and transforms your LS40 into a high-performance dual standard configuration.\n<\/p>\n<hr>\n<h3>Visual and imaging benefits<\/h3>\n<ul>\n<li>Immediate improvement in overall contrast<\/li>\n<li>Better separation of fine structures<\/li>\n<li>Optimization for solar imaging<\/li>\n<li>Simple upgrading of an existing system<\/li>\n<\/ul>\n<hr>\n<h3>Key features<\/h3>\n<table border=\"1\" cellpadding=\"6\" cellspacing=\"0\">\n<tr>\n<td><strong>Diameter<\/strong><\/td>\n<td>40 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>Type<\/strong><\/td>\n<td>Double Stack H-alpha filter<\/td>\n<\/tr>\n<tr>\n<td><strong>Compatibility<\/strong><\/td>\n<td>LS40THa<\/td>\n<\/tr>\n<tr>\n<td><strong>Installation<\/strong><\/td>\n<td>Front-mounted<\/td>\n<\/tr>\n<\/table>\n<hr>\n<h3>Enhanced contrast for your LS40<\/h3>\n<p>\nVisit <strong>Double Stack 40 mm for LS40THa<\/strong> is a direct and effective enhancement for a higher-contrast, richer and more detailed solar image.<\/p>","protected":false},"excerpt":{"rendered":"<p>Filtre Double Stack 40mm pour LS40THa Le filtre Double Stack 40 mm est sp\u00e9cialement con\u00e7u pour le LS40THa afin d\u2019augmenter significativement le contraste en observation solaire H-alpha. En ajoutant un second \u00e9talon, la bande passante effective du syst\u00e8me est r\u00e9duite, ce qui am\u00e9liore la s\u00e9lectivit\u00e9 spectrale et r\u00e9v\u00e8le davantage de d\u00e9tails \u00e0 la surface du [&hellip;]<\/p>\n","protected":false},"featured_media":13658,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[880],"product_cat":[642,881],"product_tag":[],"class_list":{"0":"post-13662","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-lunt-solar-systems","7":"product_cat-materiel-pour-lobservation-solaire","8":"product_cat-accessoires-pour-lunettes-solaires","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\/13662","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=13662"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/13658"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=13662"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=13662"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=13662"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=13662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}