{"id":112916,"date":"2026-10-09T16:52:49","date_gmt":"2026-10-09T14:52:49","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=112916"},"modified":"2026-10-09T20:32:28","modified_gmt":"2026-10-09T18:32:28","slug":"adjustment-screws-for-the-catch-mirror-of-the-gso-8-inch-classic-cassegrain-bobs-knobs","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/afstelschroeven-voor-de-vangspiegel-van-de-gso-8-inch-klassieke-cassegrain-bobs-knobs\/","title":{"rendered":"Adjustment screws for the viewfinder of the GSO 8 inch classic Cassegrain | Bob\u2019s Knobs"},"content":{"rendered":"

With the Moon, planets and double stars you need high magnifications, and good collimation is the difference between a sharp and a blurred image. With Bob\u2019s Knobs for the GSO Cassegrain 8 inch you adjust the secondary mirror while looking at a star, without having to use any tools.<\/p>\n\n\n\n

The buttons replace the adjustment screws of the secondary mirror of the GSO 8 inch classic Cassegrain. This telescope has a long focal length. What you can see with it on the red planet, you can read in Mars through a telescope<\/a>.<\/p>\n\n\n\n

Replace the screws one by one so that the mirror stays fixed, and when adjusting, always turn a little at a time. If it is cloudy, you can practice with a Artificial star as training point<\/a>.<\/p>\n\n\n\n

For the smaller 6 inch there is a set for the GSO 6 inch<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Adjustment buttons from Bob\u2019s Knobs for the viewfinder of the GSO 8 inch classic Cassegrain telescope. Adjusting manually.<\/p>","protected":false},"featured_media":112915,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1559],"product_cat":[56,3091],"product_tag":[],"class_list":["post-112916","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":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":112916,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"The ZWO Seestar S50 Pro is the successor to the Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), two 8.3 MP 4K sensors, a 63-degree wide-angle camera for the Milky Way up to 8K, three built-in filters, a 10,000 mAh battery (up to 9 hours), and 128 GB of storage. Four capture modes for...","rel":"","context":"With 5 comments","block_context":{"text":"With 5 comments","link":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/#comments"},"img":{"alt_text":"ZWO Seestar S50 Pro hero","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/112916","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=112916"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/112915"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=112916"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=112916"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=112916"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=112916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}