{"id":33986,"date":"2025-11-16T11:53:49","date_gmt":"2025-11-16T10:53:49","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=33986"},"modified":"2026-07-20T14:20:48","modified_gmt":"2026-07-20T12:20:48","slug":"william-optics-4-extension-piece-for-flat-gt","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-4-verlengstuk-voor-flat-gt\/","title":{"rendered":"William Optics 4 Extension for Flat GT"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>William Optics 4 Verlengstuk\u00a0voor Flat GT: backfocus op maat voor je Flat GT-trein<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dit William Optics verlengstuk brengt je cameratrein op lengte wanneer je met de Flat GT werkt en backfocus tekortkomt. Met 67 mm (2,6 inch) optische lengte en M92-schroefdraad aan beide zijden zit alles volledig geschroefd, zonder speling of kanteling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Een geschroefde trein is bij fotografie de enige route naar herhaalbare scherpte: je camera blijft recht staan, je framing houdt stand en hoeksterren blijven rond.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-4-Verlengstuk-voor-Flat-GT-1.jpg\" alt=\"William Optics 67 mm verlengstuk M92 voor Flat GT\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-4-Verlengstuk-voor-Flat-GT-2.jpg\" alt=\"William Optics 67 mm verlengstuk M92 voor Flat GT\" title=\"\"><\/figure><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>67 mm (2,6 inch) optische lengte<\/li><li>M92-schroefdraad aan beide zijden, volledig kantelvrij<\/li><li>Voor het bereiken van de juiste backfocus in Flat GT-opstellingen<\/li><li>Stijve, duurzame constructie<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Voor cameratreinen met M92-aansluitingen rond de William Optics Flat GT. Meet je benodigde backfocus voor je bestelt.<\/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>67 mm (2,6 inch)<\/td><\/tr><tr><td><strong>Thread<\/strong><\/td><td>M92 aan beide zijden<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this merk at the <a href=\"\/en\/brands\/william-optics\/\">William Optics merk Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>William Optics verlengstuk voor de Flat GT: 67 mm optische lengte met M92-schroefdraad aan beide zijden, voor het bereiken van de juiste backfocus.<\/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":[34224],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":34224,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-flat-gt-flattener-gran-turismo-refractor-2-inch\/","url_meta":{"origin":33986,"position":0},"title":"William Optics Flat GT Flattener for GranTurismo Refractor","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics Flat GT flattener voor de GranTurismo 71 en 81: M63-telescoopzijde, M48-camerazijde met filterdraad, full-frame correctie en slechts 22 mm lang.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flat-GT-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":34298,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-flat68iii-flattener\/","url_meta":{"origin":33986,"position":1},"title":"William Optics Flat68III Flattener","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics Flat68III flattener: Ohara-glas met volledige FMC-coating, verstelbare backfocus met borgring, M92-telescoopzijde, T2-camerazijde en geintegreerde M48-filterdraad.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flat68III-Flattener-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":33971,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-6a-adapters-voor-flattener\/","url_meta":{"origin":33986,"position":2},"title":"William Optics 6A Adapters for Flattener\u00a0","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics 6A-adapter van M92 naar M63: geschroefde, kantelvrije koppeling voor de Flat6A en Flat6A III flatteners.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":34170,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-m92-rotator\/","url_meta":{"origin":33986,"position":3},"title":"William Optics M92 Rotator\u00a0","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics M92 rotator for 3-inch focusers: 360-degree camera rotation with M92 and M83 threads. Frame without losing focus or alignment.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Rotator-M92-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":34222,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-flat7a-adjustable-flattener-reducer\/","url_meta":{"origin":33986,"position":4},"title":"William Optics Flat7A Adjustable Flattener Reducer","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics Flat7A verstelbare flattener-reducer 0,8x: Ohara-triplet met FMC-coating, M92-telescoopzijde, T2-camerazijde en M48-filterdraad. Voor refractors van f\/5 tot f\/7.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flat7A-Adjustable-Flattener-Reducer-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":33836,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-granturismo-81-478-apo-iv-ota-rood\/","url_meta":{"origin":33986,"position":5},"title":"William Optics GranTurismo 81\/478 APO IV OTA Red","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics GranTurismo 81 IV Rood: FPL-53 triplet apochromaat 81\/478 f\/5,9 in rode uitvoering. Geleverd met Vixen-zwaluwstaart, handvat, Bahtinov-masker, adapter en draagtas.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-478-81-Apochromatische-refractor-Gran-Turismo-IV-OTAWilliam-Optics-AP-81478-81-Apochromatische-refractor-Gran-Turismo-IV-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/33986","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=33986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97444"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33986"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33986"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33986"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33986"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}