{"id":112891,"date":"2026-10-09T16:52:44","date_gmt":"2026-10-09T14:52:44","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=112891"},"modified":"2026-10-09T20:31:58","modified_gmt":"2026-10-09T18:31:58","slug":"adjustment-screws-for-the-rearview-mirror-of-a-14-inch-sct-6-freestanding-screws-bobs-knobs","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-vangspiegel-van-een-14-inch-sct-6-vrijliggende-schroeven-bobs-knobs\/","title":{"rendered":"Adjusting screws for the rear mirror of a 14 inch SCT, 6 free-standing screws | Bob\u2019s Knobs"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Getting to the front of a 14-inch tubeless tire with a screwdriver in hand is awkward, and you\u2019ll be very close to the glass. With Bob\u2019s Knobs for your 14-inch SCT, you replace the original screws on the secondary mirror with larger knobs so you can align the mirror by hand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This set is intended for 14 inch Schmidt-Cassegrains with six screws that are visible on the secondary holder, so not under a cover. Compare well with your telescope before ordering. You can find this type of viewer at <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/catadioptric-telescopes\/\">catadioptric telescopes<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Replace the screws one by one so that the mirror stays fixed, and then adjust the collimation to a bright star. A coated corrector plate helps against fogging. <a href=\"https:\/\/www.telescoop.nl\/en\/dewband-for-14-and-16-inch-telescopes-astrozap\/\">rainband for 14 and 16 inch<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the screws are different for you, then take a look at the <a href=\"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-14-inch-sct-f11-vangspiegel-uitvoering-set-screw-bobs-knobs\/\">set screw version for 14 inch<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Large adjustment buttons from Bob\u2019s Knobs for 14-inch SCTs with six free-standing screws on the mount for the rearview mirror.<\/p>","protected":false},"featured_media":112890,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1559],"product_cat":[56,3091],"product_tag":[],"class_list":["post-112891","product","type-product","status-publish","has-post-thumbnail","product_brand-bobs-knobs","product_cat-telescoop-accessoires","product_cat-telescoop-onderdelen","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":30386,"url":"https:\/\/www.telescoop.nl\/en\/bobs-knobs-afstelschroeven-voor-skywatcher-newton-secundaire-spiegel\/","url_meta":{"origin":112891,"position":0},"title":"Bob's Knobs Adjusting Screws for SkyWatcher Newton Secondary Mirror","author":"","date":"08-10-2025","format":false,"excerpt":"Bob's Knobs for the secondary mirror of Sky-Watcher Newtonians: collimating without a screwdriver above the open tube.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Bob\u2019s Knobs Afstelschroeven voor SkyWatcher Newton Secundaire Spiegel","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Skywatcher-Newton-tot-12-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":112877,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-14-inch-sct-f-11-vangspiegel-uitvoering-set-screw-bobs-knobs\/","url_meta":{"origin":112891,"position":1},"title":"Adjusting screws for 14 inch SCT f\/11 viewfinder mirror, set screw version | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Bob's Knobs in the set screw version for the secondary mirror of a 14 inch SCT f\/11. Collimating by hand.","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\/10\/58059_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58059_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58059_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":30398,"url":"https:\/\/www.telescoop.nl\/en\/bobs-knobs-afstelschroeven-voor-celestron-sct-11-f-10-metric\/","url_meta":{"origin":112891,"position":2},"title":"Bob's Knobs Adjusting Screws for Celestron SCT 11\u2033 f\/10 Metric","author":"","date":"08-10-2025","format":false,"excerpt":"Bob's Knobs for the Celestron 11-inch f\/10 SCT Metric: stainless steel thumb screws for secure, tool-free secondary mirror collimation.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Bob\u2019s Knobs Afstelschroeven voor Celestron SCT 11\" f\/10 Metric","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-11-f-10-metric.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":30394,"url":"https:\/\/www.telescoop.nl\/en\/bobs-knobs-afstelschroeven-voor-celestron-sct-8-post-1980-standard\/","url_meta":{"origin":112891,"position":3},"title":"Bob's Knobs Adjusting screws for Celestron SCT 8\u2033 (post-1980 Standard)","author":"","date":"08-10-2025","format":false,"excerpt":"Bob's Knobs for the Celestron 8-inch SCT (post-1980 Standard): Stainless steel thumbscrews for secure, tool-free collimation of the secondary mirror.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Afstelschroeven voor Celestron SCT","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=350%2C200&ssl=1 1x, 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mirror collimation.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Afstelschroeven voor Celestron SCT","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-SCT-8-post-1980-Standard-.jpg?resize=1050%2C600&ssl=1 3x, 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This way you can line up without a screwdriver.","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\/10\/58067_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58067_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58067_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/112891","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=112891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/112890"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=112891"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=112891"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=112891"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=112891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}