{"id":109391,"date":"2026-07-16T16:56:13","date_gmt":"2026-07-16T14:56:13","guid":{"rendered":"https:\/\/www.telescoop.nl\/lunt-ls130mt-dsii-double-stack-module\/"},"modified":"2026-09-29T20:02:46","modified_gmt":"2026-09-29T18:02:46","slug":"lunt-ls130mt-dsii-double-stack-module","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/lunt-ls130mt-dsii-double-stack-module\/","title":{"rendered":"Lunt LS130MT DSII Double-Stack Module"},"content":{"rendered":"<h2 class=\"wp-block-heading\">From &lt;0.7 to &lt;0.5 Angstroms<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A single etalon transmits a band of about 0.7 Angstroms. That is narrow enough to see prominences and coarse structures, but the residual continuum light that leaks through reduces the contrast on the <em>surface<\/em>. The <strong>DSII double-stack module<\/strong> connect a second etalon in series and bring the bandwidth back to <strong>less than 0.5 Angstrom<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/07\/Lunt-LS130MT-DSII-Double-Stack-Module1.jpg\" alt=\"Lunt LS130MT DSII Double-Stack Module\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/07\/Lunt-LS130MT-DSII-Double-Stack-Module2.jpg\" alt=\"Lunt LS130MT DSII Double-Stack Module\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/07\/Lunt-LS130MT-DSII-Double-Stack-Module3.jpg\" alt=\"Lunt LS130MT DSII Double-Stack Module\" title=\"\"><\/figure><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The effect is dramatic on precisely that which you see least well with a single system: <strong>filaments, active regions, and fine surface structure<\/strong> The prominences on the edge change less; they were already clearly visible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">In the back, not the front<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike external double-stack filters that you attach in front of the lens, the DSII <strong>inside the telescope<\/strong>. This means no extra weight on the front, no balance issues, and a reticle that is protected from dust and moisture. The module, just like the telescope itself, is adjusted via the Pressure-Tuner system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Only suitable for the LS130MT.<\/strong> This module does not fit other Lunt telescopes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Specifications<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Type:<\/strong> internal double-stack module<\/li>\n\n\n\n<li><strong>Bandwidth after double-stacking:<\/strong> 0.5 \u00c5ngstr\u00f6m<\/li>\n\n\n\n<li><strong>Alignment<\/strong> Pressure-Tuner<\/li>\n\n\n\n<li><strong>Suitable for:<\/strong> exclusively Lunt LS130MT<\/li>\n\n\n\n<li><strong>Bresser Article Number:<\/strong> 0551690<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What you receive<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LS130MT\/DSII double-stack module<\/li>\n\n\n\n<li>Manual<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Safety<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Never look at the sun without the H-alpha etalon and blocking filter correctly installed. Use the instrument only as intended by Lunt and never disassemble it. Never leave a telescope pointed at the sun unattended.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more solar instruments and modules from this brand on the <a href=\"\/en\/brands\/lunt-solar-systems\/\">Lunt Solar Systems brand page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Internal dual-stack module with Pressure-Tuner for the LS130MT. Reduces bandwidth to &lt;0.5 Angstrom for significantly more contrast on filaments and active regions.<\/p>","protected":false},"featured_media":109443,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[2976],"product_cat":[3178],"product_tag":[],"class_list":["post-109391","product","type-product","status-publish","has-post-thumbnail","product_brand-lunt-solar-systems","product_cat-zonnefilters","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":109391,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"The ZWO Seestar S50 Pro is the successor to the Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), two 8.3 MP 4K sensors, a 63-degree wide-angle camera for the Milky Way up to 8K, three built-in filters, a 10,000 mAh battery (up to 9 hours), and 128 GB of storage. Four capture modes for...","rel":"","context":"With 5 comments","block_context":{"text":"With 5 comments","link":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/#comments"},"img":{"alt_text":"ZWO Seestar S50 Pro hero","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/109391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=109391"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/109443"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=109391"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=109391"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=109391"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=109391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}