{"id":30773,"date":"2025-10-11T13:36:10","date_gmt":"2025-10-11T11:36:10","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=30773"},"modified":"2026-09-10T14:38:32","modified_gmt":"2026-09-10T12:38:32","slug":"explore-scientific-305-1525-dobson-ultra-light-gen-ii","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/explore-scientific-305-1525-dobson-ultra-light-gen-ii\/","title":{"rendered":"Explore Scientific 305\/1525 Dobson Ultra Light Gen II"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Twelve inches that fit in the trunk<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Explore Scientific Dobson 305\/1525 Ultra Light Gen II<\/strong> is designed for serious visual observers. The 305 mm primary mirror captures 44 percent more light than the 254 mm model: fainter nebulae, galaxies, and globular clusters become significantly more visible.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gen II: stiffer, lighter, faster to assemble<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The all-metal truss construction is stiffer and lighter than classic wooden Dobsons. The modular design assembles in minutes and packs away just as quickly: the secondary mirror cage, truss tubes, and altitude wheels all fit inside the aluminum rocker box. The parabolic BK7 mirror rests in a modern 9-point cell with front collimation, and two fans quickly bring it to ambient temperature.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Be honest about the size<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Twelve inches is a commitment: expect around 25 kg total and a permanent spot in the car. If you're undecided between the 254 and the 305, and the telescope will mostly be in the garden, then the 254 is the more manageable all-rounder. If you regularly drive to dark skies, the extra aperture will pay off immediately. The practical working magnification is around 250x to 350x.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>In the box<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optical tube 305\/1525 with aluminum truss structure Gen II<\/li>\n\n\n\n<li>Parabolic BK7 primary mirror in 9-point cell<\/li>\n\n\n\n<li>Two built-in mirror fans<\/li>\n\n\n\n<li>Aluminum rocker box<\/li>\n\n\n\n<li>Rack-and-pinion focuser<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Featured accessories<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/moon-and-planet-filters-color-filters\/\">Omegon Premium Moon Filter 50 Percent 2 Inch<\/a> (34.90 euros) is the bright Moon comfortable at this opening.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">For whom yes, for whom no<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">For: experienced visual observers who want maximum deep-sky performance in a portable package. Not for: those who primarily observe from a backyard in the city; light pollution limits what this aperture can offer, and the 254 is the wiser choice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Specifications<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Optical design<\/td><td>Newton reflector, parabolic BK7 mirror<\/td><\/tr><tr><td>Opening<\/td><td>305 mm<\/td><\/tr><tr><td>Focal length<\/td><td>1525 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/5<\/td><\/tr><tr><td>Mirror cell<\/td><td>9-point, collimation from the front<\/td><\/tr><tr><td>Cooling<\/td><td>Two built-in fans<\/td><\/tr><tr><td>Construction<\/td><td>Full Metal, Truss (Gen II)<\/td><\/tr><tr><td>Focuser<\/td><td>Rack-and-pinion<\/td><\/tr><tr><td>Mount<\/td><td>Dobson rockerbox<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Unsure about the right size? Our <a href=\"https:\/\/www.telescoop.nl\/en\/the-best-telescope-for-beginners\/\">Buyer's guide for beginners<\/a> and the <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-selection-aid\/\">telescope selection aid<\/a> help you choose. Also check out all <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/dobsonian-telescopes\/\">Dobson telescopes<\/a> and the full range of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/explore-scientific\/\">Explore Scientific<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Explore Scientific Dobson 305\/1525 Ultra Light Gen II: twelve-inch all-metal truss Dobsonian, 44 percent more light than the 254. With 9-point mirror cell, dual fans, and rack-and-pinion focuser.<\/p>","protected":false},"featured_media":30775,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[498],"product_cat":[51,566,3166,3160,2972],"product_tag":[],"class_list":["post-30773","product","type-product","status-publish","has-post-thumbnail","product_brand-explore-scientific","product_cat-telescopen","product_cat-dobson-telescopen","product_cat-handmatige-reflectoren","product_cat-inklapbare-dobson","product_cat-reflector-telescopen","product_shipping_class-licht","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":[24823],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":30773,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"De ZWO Seestar S50 Pro is de opvolger van de Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), twee 4K-sensoren van 8,3 MP, een groothoekcamera van 63 graden voor de Melkweg tot 8K, drie ingebouwde filters, 10.000 mAh accu (tot 9 uur) en 128 GB opslag. Vier opnamemodi voor\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"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\/30773","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=30773"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/30775"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=30773"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=30773"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=30773"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=30773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}