{"id":32457,"date":"2025-11-02T15:33:48","date_gmt":"2025-11-02T14:33:48","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=32457"},"modified":"2026-08-23T15:12:10","modified_gmt":"2026-08-23T13:12:10","slug":"bresser-extension-hexafoc-37-5mm-2-5-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/bresser-verlengstuk-hexafoc-37-5mm-2-5-inch\/","title":{"rendered":"Bresser extension Hexafoc 37.5mm 2.5 inch"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Bresser extension Hexafoc 37.5mm 2.5 inch: the right distance for a sharp image<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Bresser 37.5 mm (1.5 inch) extension extends the optical path between your focus ring and your eyepiece or camera. This version has M68 threaded screws and therefore fits directly onto the 2.5 inch Hexafoc focus ring of Bresser telescopes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Without the correct distance, you simply cannot achieve focus: the focuser reaches the end of its travel before the image is sharp. This extension tube solves that. The aluminum is rigid and does not tilt, which is important for long focal length photography.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-37-5mm-2-5-Verlengstuk-Hexafoc.jpg\" alt=\"Bresser extension 37.5 mm M68 for Hexafoc\" title=\"\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Optical length of 37.5 mm (1.5 inch)<\/li><li>Rigid aluminum, no camera or eyepiece tilt<\/li><li>Resolves focus problems with eyepieces and cameras<\/li><li>Also usable as a spacer ring for the correct backfocus<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For the Bresser 2.5 inch Hexafoc viewfinder and other M68 systems. Combine with the 25 mm version for intermediate distances.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Optical length<\/strong><\/td><td>37.5 mm (1.5 inch)<\/td><\/tr><tr><td><strong>Connection<\/strong><\/td><td>M68 thread (M68\/M68)<\/td><\/tr><tr><td><strong>Material<\/strong><\/td><td>Aluminum<\/td><\/tr><tr><td><strong>System<\/strong><\/td><td>Hexafoc 2.5 inch \/ M68<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this brand at the <a href=\"\/en\/brands\/bresser\/\">Bresser 1TP5 Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bresser extension tube 37.5 mm with M68 threaded connection for the 2.5 inch Hexafoc focus lens. Rigid aluminum for visual use and astrophotography.<\/p>","protected":false},"featured_media":96670,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[128],"product_cat":[56,499],"product_tag":[],"class_list":["post-32457","product","type-product","status-publish","has-post-thumbnail","product_brand-bresser","product_cat-telescoop-accessoires","product_cat-adapters","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":30656,"url":"https:\/\/www.telescoop.nl\/en\/bresser-verlengstuk-25-mm-2-5-inch-hexafoc-m68\/","url_meta":{"origin":32457,"position":0},"title":"Bresser Extension 25 mm 2.5\u2033 Hexafoc M68","author":"","date":"08-10-2025","format":false,"excerpt":"Bresser 25 mm extension tube with M68 thread on both sides, for the 2.5-inch Hexafoc focuser. Rigid aluminum, can also be used as a backfocus ring.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Bresser Verlengstuk 25 mm 2.5\" Hexafoc M68","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Verlengstuk-25mm-2-5-Hexafoc.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":32467,"url":"https:\/\/www.telescoop.nl\/en\/bresser-verlengstuk-35mm-2-inch\/","url_meta":{"origin":32457,"position":1},"title":"Bresser extension piece 35mm 2 inch","author":"","date":"02-11-2025","format":false,"excerpt":"Bresser 35 mm lens hood for 2 inch focusers: solves focus problems with eyepieces, binoviewers and cameras. 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An 8 inch parabolic Newton with high light gathering capability and a simple design.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Bresser Dobson Telescoop N 203\/1200 Messier Hexafoc DOB","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Bresser-Dobson-telescoop-N-203-1200-Messier-Hexafoc-DOB.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":107775,"url":"https:\/\/www.telescoop.nl\/en\/televue-imaging-system-254-mm-verlengstuk\/","url_meta":{"origin":32457,"position":3},"title":"TeleVue Imaging System 1-inch - 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