{"id":33813,"date":"2025-11-14T17:49:28","date_gmt":"2025-11-14T16:49:28","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=33813"},"modified":"2026-07-18T13:41:01","modified_gmt":"2026-07-18T11:41:01","slug":"william-optics-granturismo-71-420-apo-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-granturismo-71-420-apo-ota\/","title":{"rendered":"William Optics GranTurismo 71\/420 APO OTA"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Triplet-scherpte in reisformaat<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>William Optics GranTurismo 71<\/strong> is klein van formaat en groot in prestatie. De triplet-lens met FPL-53 glas houdt kleuren strak bij elkaar, zodat sterren puntvormig blijven en foto\u2019s rustiger, scherper en makkelijker te bewerken zijn. Ook visueel levert het triplet een helder, contrastrijk beeld.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" data-id=\"33814\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-420-GT-71-Apochromatische-refractor-Gran-Turismo-2.jpg\" alt=\"William Optics GranTurismo 71 apochromatische triplet refractor, totaalbeeld\" class=\"wp-image-33814\" title=\"\"><\/figure>\n<\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8d39b2df wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-420-GT-71-Apochromatische-refractor-Gran-Turismo-3.jpg\" alt=\"De GranTurismo 71 met 2,5 inch rack-and-pinion focuser\" class=\"wp-image-33815\" title=\"\"><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">Serieuze focuser, compacte buis<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">De 2,5 inch rack-and-pinion focuser met 1:10 fijnregeling draagt zware camera-opstellingen zonder doorzakken en stelt tot op de micron scherp. Met 420 mm brandpunt (f\/5,9) fotografeer je sterrenvelden en grotere nevels met echte triplet-kleurzuiverheid, en het Bahtinov-masker maakt scherpstellen exact. Alles past in de gevoerde transporttas.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>In the box<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optische buis GranTurismo 71\/420 triplet<\/li>\n\n\n\n<li>2,5 inch rack-and-pinion focuser met 1:10 reductie<\/li>\n\n\n\n<li>Bahtinov mask<\/li>\n\n\n\n<li>2 inch to 1.25 inch adapter<\/li>\n\n\n\n<li>Vixen swallowtail<\/li>\n\n\n\n<li>Draaghandvat<\/li>\n\n\n\n<li>Padded transport bag<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Featured accessories<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/astro-photography\/other-astrophotography-accessories\/\">William Optics Flat GT flattener<\/a> (329 euro) trekt het veld vlak tot full-frame; de UniGuide 32 mm guidescope (159 euro) maakt lange belichtingen mogelijk.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">For whom yes, for whom no<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Wel: astrofotografen die triplet-kleurcorrectie willen in een buis die overal mee naartoe kan. Niet: wie een ge\u00efntegreerd vlak veld zonder losse flattener zoekt; de RedCat 71 heeft dat Petzval-systeem ingebouwd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Specifications<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Optical design<\/td><td>Apochromaat, FPL-53 triplet<\/td><\/tr><tr><td>Opening<\/td><td>71 mm<\/td><\/tr><tr><td>Focal length<\/td><td>420 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/5,9<\/td><\/tr><tr><td>Focuser<\/td><td>2,5 inch rack-and-pinion met 1:10 reductie<\/td><\/tr><tr><td>Focus assist<\/td><td>Bahtinov mask<\/td><\/tr><tr><td>Attachment<\/td><td>Vixen-zwaluwstaart met draaghandvat<\/td><\/tr><tr><td>Execution<\/td><td>OTA (loose tube)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Unsure about the right tube for your camera and mount? The <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-selection-aid\/\">telescope selection aid<\/a> helps you choose. Also view all <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/refracting-telescopes\/\">Refracting telescopes<\/a> and the full range of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/william-optics\/\">William Optics<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>William Optics GranTurismo 71: FPL-53 triplet apochromaat 71\/420 f\/5,9 met 2,5 inch rack-and-pinion focuser (1:10). Geleverd met Bahtinov-masker, adapters, Vixen-zwaluwstaart, handvat en transporttas.<\/p>","protected":false},"featured_media":97321,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[51,428,531,3175,567],"product_tag":[],"class_list":["post-33813","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescopen","product_cat-telescopen-voor-astrofotografie","product_cat-gevorderd","product_cat-refractor-ota","product_cat-refractor-telescopen","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":33836,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-granturismo-81-478-apo-iv-ota-rood\/","url_meta":{"origin":33813,"position":0},"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. 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Geleverd met Losmandy-zwaluwstaart, handvat, accessoireschoen, Bahtinov-masker en transporttas.","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-120-780-Apochromatische-refractor-AP-Fluorostar-Red-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\/33813","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=33813"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97321"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33813"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33813"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33813"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}