{"id":93288,"date":"2026-01-10T11:26:10","date_gmt":"2026-01-10T10:26:10","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=93288"},"modified":"2026-08-25T15:12:11","modified_gmt":"2026-08-25T13:12:11","slug":"omegon-dust-caps-304mm-ota-optical-tube","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-304mm-ota-optische-buis\/","title":{"rendered":"Omegon Dust Cap for 304 mm OTA (Optical Tube)"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Omegon Dust Cover for 304 mm OTA (Optical Tube Assembly): closes the opening when the tube is not in use<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In a reflecting telescope, the primary mirror is at the bottom of the tube, with the opening as the only way out. Anything that enters through that opening will eventually hit the mirror. Dust can be blown away, but cleaning a mirror is work you'd rather not do, and it doesn't do the coating any favors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This cover seals the opening once you are finished observing. This keeps the inside of the tube clean and you need to touch the optics much less often.<\/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\/01\/Omegon-Stofkappen-Stofkap-voor-12-OTA-2.jpg\" alt=\"Omegon 12-inch dust cover for optical tube opening\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Stofkappen-Stofkap-voor-12-OTA.jpg\" alt=\"Omegon 12-inch dust cover for optical tube opening\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Stofkappen-Stofkap-voor-12-OTA-1.jpg\" alt=\"Omegon 12-inch dust cover for optical tube opening\" title=\"\"><\/figure><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Fits the opening of 12-inch pipes (304 mm)<\/li><li>Plastic version<\/li><li>Grip ribs on the side for hold with gloves<\/li><li>Equipped with ventilation openings<\/li><li>Slides over the tube and sits firmly in place<\/li><li>Suitable for storage and transport<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suitable for 12-inch tubes such as the Omegon Pro Astrograph 304\/1200, the Advanced X N 304\/1500 and the ProDob N 304\/1500 DOB II. When in doubt, measure the outer diameter of your tube, as it differs from the mirror's aperture: an 8-inch Newtonian typically has an outer diameter of around 235 mm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Suitable for<\/strong><\/td><td>12-inch optical tubes<\/td><\/tr><tr><td><strong>Material<\/strong><\/td><td>Plastic<\/td><\/tr><tr><td><strong>Execution<\/strong><\/td><td>With grip ribs<\/td><\/tr><tr><td><strong>Type<\/strong><\/td><td>Transport and storage<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more maintenance articles for this brand on the <a href=\"\/en\/brands\/omegon\/\">Omegon brand page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Plastic dust cover for the opening of a 12-inch optical tube. With grip ridges on the side. Suitable for 12-inch tubes such as the Omegon Pro Astrograph 304\/1200, the Advanced X N 304\/1500, and the ProDob N 304\/1500 DOB II.<\/p>","protected":false},"featured_media":99466,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3150,56],"product_tag":[],"class_list":["post-93288","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-schoonmaak-en-onderhoud","product_cat-telescoop-accessoires","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":93288,"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\/93288","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=93288"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/99466"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=93288"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=93288"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=93288"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=93288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}