![\"William](\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-4-Verlengstuk-voor-Flat-GT-1.jpg\" "\\"\\"")
<\/figure>\n<\/figure>\n\n\n\nMade for a fixed, stable connection<\/h3>\n\n\n\n
The adapter has an M92 thread on both sides. That means everything is tightly secured with no play. Your camera stays straight, your framing stays neat, and you don't lose focus due to tilt. So you can make longer exposures without the image shifting.<\/p>\n\n\n\n
Sturdy design that lasts a long time<\/h3>\n\n\n\n
The optical length of 67 mm is just what the Flat GT needs. The design is simple but strong. You use it over and over again without the threads wearing out or loosening. This keeps your setup reliable even during long astrophotography sessions.<\/p>\n\n\n\n William Optics 4 Extension for Flat GT comes as an essential 67mm extension tube with M92 thread, specially designed to achieve proper back focus for astrophotography with the Flat GT flattener. \u00a0<\/p>","protected":false},"featured_media":97444,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[56,499],"product_tag":[],"class_list":["post-33986","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescoop-accessoires","product_cat-adapters","product_shipping_class-licht","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":106246,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-discovery-spark-767-az\/","url_meta":{"origin":33986,"position":0},"title":"Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian Reflector","author":"Abdullah Ibrar","date":"05-04-2026","format":false,"excerpt":"The Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian reflector comes with SR4mm, H12.5mm, and H20mm eyepieces, a 2x Barlow lens, an optical finder, an aluminum tripod with an accessory tray, and the colorful knowledge book \u201cSpace. 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<\/figure>\n<\/figure>\n\n\n\nSpecifications<\/h3>\n\n\n\n
Capacity<\/h4>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Suitable for<\/td> Flat GT<\/td><\/tr> Telescope connection<\/td> M92<\/td><\/tr> Camera side connection<\/td> M92 weiblich<\/td><\/tr> Optical length (mm)<\/td> 67<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n General<\/h4>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Type<\/td> Adapters<\/td><\/tr> Design<\/td> Adapters<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"