{"id":93284,"date":"2026-01-10T11:16:22","date_gmt":"2026-01-10T10:16:22","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=93284"},"modified":"2026-08-25T15:12:11","modified_gmt":"2026-08-25T13:12:11","slug":"omegon-dust-caps-254mm-ota-optical-tube","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-254mm-ota-optische-buis\/","title":{"rendered":"Omegon Dust Cap for 254 mm OTA (Optical Tube)"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Omegon Dust Cover for 254 mm OTA (Optical Tube Assembly): closes the aperture 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-10-OTA-2.jpg\" alt=\"Omegon 10-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-10-OTA.jpg\" alt=\"Omegon 10-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-10-OTA-1.jpg\" alt=\"Omegon 10-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 10 inch pipes (254 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 10-inch tubes such as the Omegon Pro RC 254\/2000. 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>10-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 10-inch optical tube. With grip ribs on the side. Suitable for 10-inch tubes such as the Omegon Pro RC 254\/2000.<\/p>","protected":false},"featured_media":99463,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3150,56],"product_tag":[],"class_list":["post-93284","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":93275,"url":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-150mm-ota-optische-buis\/","url_meta":{"origin":93284,"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. 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Suitable for 8-inch tubes from brands including Omegon, Sky-Watcher, and Vixen, including the Omegon Advanced X N 203\/1200.","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-8-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":93288,"url":"https:\/\/www.telescoop.nl\/en\/omegon-stofkappen-304mm-ota-optische-buis\/","url_meta":{"origin":93284,"position":2},"title":"Omegon Dust Cap for 304 mm OTA (Optical Tube)","author":"","date":"10-01-2026","format":false,"excerpt":"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.","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":92373,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pronewton-n-254-1250-ota\/","url_meta":{"origin":93284,"position":3},"title":"Omegon ProNewton N 254\/1250 OTA - 254mm Newton","author":"Info telescoop","date":"04-01-2026","format":false,"excerpt":"This is just the tube (OTA), without mounting and tripod. You can choose the appropriate mounting and the accessories that come with it below. The Omegon ProNewton N 254\/1250 comes with a 2 inch Crayford-type focus lens with a 1:10 reduction, tube rings, a 1.25\/2 inch adapter, an 8\u00d750 viewfinder, a fan with battery compartment, a dovetail rail and a dovetail sleeve.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon ProNewton N 254\/1250 OTA telescoop","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Telescoop-ProNewton-N-254-1250-OTA-5.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92076,"url":"https:\/\/www.telescoop.nl\/en\/omegon-254-1016-pro-astrograph-ota\/","url_meta":{"origin":93284,"position":4},"title":"Omegon 254\/1016 Pro Astrograph OTA","author":"","date":"03-01-2026","format":false,"excerpt":"This is just the tube (OTA), without mounting and tripod. You can choose the appropriate mounting and the accessories that come with it below. 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Supplied with two 70-degree eyepieces, 2-inch Crayford focuser, 9x50 finder scope, and smartphone adapter. 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