{"id":112857,"date":"2026-10-09T16:52:33","date_gmt":"2026-10-09T14:52:33","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=112857"},"modified":"2026-10-09T20:31:36","modified_gmt":"2026-10-09T18:31:36","slug":"adjustment-screws-for-the-main-mirror-of-a-10-inch-newton-bobs-knob","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-hoofdspiegel-van-een-10-inch-newton-bobs-knobs\/","title":{"rendered":"Adjusting screws for the main mirror of a 10 inch Newton | Bob\u2019s Knobs"},"content":{"rendered":"

Behind the main mirror of a Newton are the screws that align the mirror. With many telescopes you need tools for that, and that\u2019s quite inconvenient in the dark behind the tube. With these adjustment screws for a 10-inch Newton from Bob\u2019s Knobs, you turn with your fingers at large knobs.<\/p>\n\n\n\n

The set is intended for the main mirror cell of a 10-inch Newton telescope, like the ones you find in many reflector telescopes<\/a> and Dobson's. The mirror cell differs merk per model, so check beforehand whether this set fits your telescope.<\/p>\n\n\n\n

Replace the screws one by one so that the mirror does not shift. Then line up the aiming mirror and the main mirror again with a collimation cap or a Cheshire collimation eyepiece from Sky-Watcher<\/a>. You can read about how that works step by step in our explanation about collimation<\/a>.<\/p>\n\n\n\n

If you have a 12-inch Newton, then there is one set for the 12 inch head mirror<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Large adjustment buttons from Bob\u2019s Knobs for the main mirror cell of a 10-inch Newton. Aligning is then done by hand.<\/p>","protected":false},"featured_media":112856,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1559],"product_cat":[56,3091],"product_tag":[],"class_list":["post-112857","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":112859,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-hoofdspiegel-van-een-12-inch-newton-bobs-knobs\/","url_meta":{"origin":112857,"position":0},"title":"Adjusting screws for the main mirror of a 12 inch Newton | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Bob's Knobs for the main mirror cell of a 12 inch Newton, which allows you to align the mirror without tools.","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\/55357_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/55357_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/55357_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":30386,"url":"https:\/\/www.telescoop.nl\/en\/bobs-knobs-afstelschroeven-voor-skywatcher-newton-secundaire-spiegel\/","url_meta":{"origin":112857,"position":1},"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":112895,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-vangspiegel-van-een-10-inch-schmidt-newton-snt-bobs-knobs\/","url_meta":{"origin":112857,"position":2},"title":"Adjusting screws for the viewfinder of a 10 inch Schmidt-Newton (SNT) | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Buttons from Bob's Knobs for aligning the viewfinder of a 10 inch Schmidt-Newton, without tools.","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\/58082_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58082_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58082_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":112897,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-hoofdspiegel-van-de-vixen-r200ss-bobs-knobs\/","url_meta":{"origin":112857,"position":3},"title":"Adjusting screws for the main mirror of the Vixen R200SS | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Bob's Knobs for the main mirror cell of the Vixen R200SS. This allows you to adjust the mirror manually, even when the telescope is already outside.","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\/58103_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58103_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/58103_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":112914,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-vangspiegel-van-de-gso-6-inch-klassieke-cassegrain-bobs-knobs\/","url_meta":{"origin":112857,"position":4},"title":"Adjusting screws for the viewfinder of the GSO 6 inch classic Cassegrain | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Adjustment buttons for the convex viewfinder of the GSO 6 inch classic Cassegrain, by Bob's Knobs.","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\/87510_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/87510_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/87510_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":112910,"url":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-celestron-starsense-explorer-8-en-10-inch-dobson-bobs-knobs\/","url_meta":{"origin":112857,"position":5},"title":"Adjustment screws for the Celestron StarSense Explorer 8 and 10 inch Dobson | Bob\u2019s Knobs","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Adjusting the mirrors of your StarSense Explorer 8 or 10 inch without tools, with large buttons from Bob's Knobs.","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\/85348_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/85348_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/85348_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/112857","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=112857"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/112856"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=112857"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=112857"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=112857"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=112857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}