{"id":93279,"date":"2026-01-10T11:10:31","date_gmt":"2026-01-10T10:10:31","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=93279"},"modified":"2026-08-25T15:12:11","modified_gmt":"2026-08-25T13:12:11","slug":"omegon-dust-caps-203mm-ota-optical-tube","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-203mm-ota-optische-buis\/","title":{"rendered":"Omegon Dust cap for 203 mm OTA (Optical Tube)"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Omegon Dust Cap for 203 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-8-OTA-2.jpg\" alt=\"Omegon 8-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-8-OTA.jpg\" alt=\"Omegon 8-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-8-OTA-1.jpg\" alt=\"Omegon 8-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 8 inch pipes (203 mm)<\/li><li>Plastic version<\/li><li>Grip ribs on the side for hold with gloves<\/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 8-inch tubes from brands including Omegon, Sky-Watcher, and Vixen, such as the Omegon Advanced X N 203\/1200. If in doubt, measure the outer diameter of your tube, as it differs from the aperture of the mirror: 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>8-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 merk on the <a href=\"\/en\/brands\/omegon\/\">Omegon merk Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Plastic dust cover for the opening of an 8-inch optical tube. With grip ribs on the side. Suitable for 8-inch tubes from brands including Omegon, Sky-Watcher, and Vixen, including the Omegon Advanced X N 203\/1200.<\/p>","protected":false},"featured_media":99460,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3150,56],"product_tag":[],"class_list":["post-93279","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-schoonmaak-en-onderhoud","product_cat-telescoop-accessoires","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":93275,"url":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-150mm-ota-optische-buis\/","url_meta":{"origin":93279,"position":0},"title":"Omegon Dust cap for 150 mm OTA (Optical Tube Assembly)","author":"","date":"10-01-2026","format":false,"excerpt":"Plastic dust cap for the opening of a 6-inch optical tube. With grip ribs on the side. Suitable for 6-inch Newton tubes such as the Omegon Advanced 150\/750 and the ProNewton 153\/750.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Stofkappen-Stofkap-voor-6-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":93284,"url":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-254mm-ota-optische-buis\/","url_meta":{"origin":93279,"position":1},"title":"Omegon Dust Cap for 254 mm OTA (Optical Tube)","author":"","date":"10-01-2026","format":false,"excerpt":"Kunststof stofkap voor de opening van een optische buis van 10 inch. Met gripribbels aan de zijkant. 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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.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Stofkappen-Stofkap-voor-12-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92095,"url":"https:\/\/www.telescoop.nl\/en\/omegon-203-800-pro-astrograph-ota\/","url_meta":{"origin":93279,"position":3},"title":"Omegon 203\/800 Pro Astrograph Carbon OTA","author":"","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro Astrograph 203\/800 Carbon comes with a carbon fiber tube, 2-inch Rack and Pinion focuser with M56, CNC tube rings, Losmandy dovetail, finder shoe, and dust cap: 8-inch deep-sky speed.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Telescoop-Pro-Astrograph-Carbon-203-800-OTA-7.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":16308,"url":"https:\/\/www.telescoop.nl\/en\/omegon-203-2436-cassegrain-ota\/","url_meta":{"origin":93279,"position":4},"title":"Omegon 203\/2436 Cassegrain Newton","author":"Info telescoop","date":"23-07-2025","format":false,"excerpt":"The Omegon 203\/2436 Cassegrain offers a 2436mm focal length with high sharpness and contrast in a compact, collimation-stable tube: the alternative to a long refractor, for planets and high-res photography.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Cassegrain-Teleskop 203mm f\/12 OTA","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Cassegrain-telescoop-Pro-CC-203-2436-OTA.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":92367,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pronewton-n-203-1000-ota\/","url_meta":{"origin":93279,"position":5},"title":"Omegon ProNewton N 203\/1000 OTA","author":"Info telescoop","date":"04-01-2026","format":false,"excerpt":"The Omegon ProNewton N 203\/1000 comes with a metal Newtonian optical tube, 2-inch Crayford focuser, red dot finder, tube rings, 1.25\/2-inch adapter, and a Vixen-style dovetail: the 8-inch all-rounder as an optical tube assembly.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Telescoop-ProNewton-N-203-1000-OTA-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/93279","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=93279"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/99460"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=93279"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=93279"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=93279"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=93279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}