{"id":112871,"date":"2026-10-09T16:52:39","date_gmt":"2026-10-09T14:52:39","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=112871"},"modified":"2026-10-09T20:31:45","modified_gmt":"2026-10-09T18:31:45","slug":"adjustment-screws-for-the-viewfinder-of-a-925-inch-sct-with-fastar-bobs-knobs","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-vangspiegel-van-een-925-inch-sct-met-fastar-bobs-knobs\/","title":{"rendered":"Adjusting screws for the rear mirror of a 9.25 inch SCT with Fastar | Bob\u2019s Knobs"},"content":{"rendered":"<p class=\"wp-block-paragraph\">If you ever take the secondary mirror off your Schmidt-Cassegrain to photograph with a camera in the primary focal point, you\u2019ll have to re-collimate it afterwards. With these collimation screws for a SCT with Fastar from Bob\u2019s Knobs, you do it with your fingers instead of with a screwdriver.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With a Fastar telescope, the holder of the secondary mirror is constructed differently than with an ordinary SCT. This set is intended for the 9.25-inch model with Fastar. Check beforehand whether your telescope is truly Fastar-compatible. Cameras for this type of photography can be found among the <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/astro-photography\/astro-cameras\/\">astro cameras in our range<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Replace the screws one by one and then collimate on a defocused star. If you often take the telescope with you, then a <a href=\"https:\/\/www.telescoop.nl\/en\/padded-backpack-for-celestron-sc-9-25-telescopes\/\">Upholstered backpack for the C9.25<\/a> Convenient for on the go.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your 9.25 inch doesn't have a Fastar, check the <a href=\"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-925-inch-sct-f10-vangspiegel-metrisch-roestvrij-staal-bobs-knobs\/\">Set for the regular 9.25 inch SCT<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bob\u2019s Knobs for the secondary mirror of a 9.25 inch SCT with Fastar, handy if you take the mirror out more often.<\/p>","protected":false},"featured_media":112870,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1559],"product_cat":[56,3091],"product_tag":[],"class_list":["post-112871","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":30397,"url":"https:\/\/www.telescoop.nl\/en\/bobs-knobs-afstelschroeven-voor-celestron-sct-9-25-f-10-standard\/","url_meta":{"origin":112871,"position":0},"title":"Bob's Knobs Adjusting Screws for Celestron SCT 9.25\u2033 f\/10 Standard","author":"","date":"08-10-2025","format":false,"excerpt":"Bob\u2019s Knobs for the Celestron SCT 9.25 inch f\/10 Standard: Stainless steel thumb screws for secure, tool-free secondary 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 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post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58051_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58051_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58051_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":112871,"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 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Allen wrench.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Bob\u2019s Knobs Afstelschroeven voor Meade LightBridge en GSO Dobson Secundaire Spiegel","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bobs-Knobs-Kartelschroeven-voor-vangspiegel-van-Meade-Lightbridge-en-GSO.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-Meade-Lightbridge-en-GSO.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-Meade-Lightbridge-en-GSO.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-Meade-Lightbridge-en-GSO.jpg?resize=700%2C400&ssl=1 2x, 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