{"id":33676,"date":"2025-11-14T13:08:34","date_gmt":"2025-11-14T12:08:34","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=33676"},"modified":"2026-07-18T13:21:05","modified_gmt":"2026-07-18T11:21:05","slug":"william-optics-ap-61-300-61-apochromatic-refractor-redcat-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-ap-61-300-61-apochromatische-refractor-redcat-ota\/","title":{"rendered":"William Optics AP 61\/300 61 Apochromatic Refractor RedCat OTA"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Quadruplet met veldrotator: meer opening, meer detail<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>William Optics RedCat 61<\/strong> tilt het Cat-concept naar 61 mm opening en 300 mm brandpunt. De quadruplet-optiek geeft een helder, strak en vlak beeld over het volledige frame, en de ingebouwde veldrotator draait je compositie exact goed zonder de scherpstelling te verstoren.<\/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=\"33677\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-61-300-61-Apochromatische-refractor-RedCat-OTA-1.jpg\" alt=\"William Optics RedCat 61 apochromatische astrograaf, totaalbeeld\" class=\"wp-image-33677\" 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-61-300-61-Apochromatische-refractor-RedCat-OTA-2.jpg\" alt=\"De RedCat 61 met veldrotator en buisringen\" class=\"wp-image-33678\" 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\">Gemaakt voor serieuze deep-sky composities<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Het Petzval-ontwerp met ge\u00efntegreerde corrector houdt sterren rond tot in de hoeken van een full-frame sensor. Met f\/4,9 blijven belichtingen kort en de ruis laag. De meegeleverde buisringen en Arca\/Vixen-prismabalk geven een stabiele, doorbuigingsvrije montage voor camera en guidescope.<\/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 RedCat 61\/300 met ge\u00efntegreerde corrector<\/li>\n\n\n\n<li>Veldrotator<\/li>\n\n\n\n<li>Tube Rings<\/li>\n\n\n\n<li>Arca-Swiss &amp; Vixen-Style Prism Rail<\/li>\n\n\n\n<li>Bahtinov mask<\/li>\n\n\n\n<li>Nylon tote 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\">A <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/astro-photography\/other-astrophotography-accessories\/\">William Optics UniGuide 32mm Guidescope<\/a> (159 euros) completes the setup for long exposures. William Optics' M48 camera adapters are available for common mounts; choose the variant for your camera.<\/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: deep-sky fotografen die de stap maken van een 51 mm reisastrograaf naar meer opening en beeldschaal, met behoud van draagbaarheid. Niet: wie vooral maximale hemelvelden wil; de MiniCat of RedCat 51 blijft daar de specialist.<\/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, quadruplet Petzval met corrector<\/td><\/tr><tr><td>Opening<\/td><td>61 mm<\/td><\/tr><tr><td>Focal length<\/td><td>300 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/4,9<\/td><\/tr><tr><td>Veldrotator<\/td><td>Built-in<\/td><\/tr><tr><td>Field of view<\/td><td>Flat to full-frame<\/td><\/tr><tr><td>Attachment<\/td><td>Buisringen met Arca\/Vixen-prismabalk<\/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 RedCat 61: quadruplet apochromaat 61\/300 f\/4,9 met ingebouwde veldrotator en corrector. Geleverd met buisringen, Arca\/Vixen-prismabalk, Bahtinov-masker en draagtas.<\/p>","protected":false},"featured_media":97213,"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-33676","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":34051,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-61-guidescope-guide-star-apo-goud\/","url_meta":{"origin":33676,"position":0},"title":"William Optics 61 Guidescope Guide Star Apo Gold","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics GuideStar 61 apo guidescope (gold) with FPL-53 lens: accurate guiding for refractors from 700 to 1200 mm. Includes Vixen rail and carrying case.","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-Guidescope-Guide-Star-Apo-61-4.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":34058,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-61-guidescope-guide-star-apo-blue\/","url_meta":{"origin":33676,"position":1},"title":"William Optics 61 Guidescope Guide Star Apo Blue","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics GuideStar 61 apo guidescope (blauw) met FPL-53-objectief: nauwkeurige guiding voor refractors van 700 tot 1200 mm. Inclusief Vixen-rail 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-Guidescope-Guide-Star-Apo-61-10.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":33869,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-zenithstar-61-360-apo-ii-ota\/","url_meta":{"origin":33676,"position":2},"title":"William Optics ZenithStar 61\/360 APO II OTA with Flattener &amp; Guidescope","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics ZenithStar 61 II set: FPL-53 Apochromatic 61\/360 f\/5.9 complete with field flattener, UniGuide 32mm guidescope, tube rings, dovetail, and carrying case. Ready for guided astrophotography.","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-61-360-ZS61-II-Apochromatische-refractor-ZenithStar-OTA-3-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":33858,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-zenithstar-61-360-apo-ii-ota-2\/","url_meta":{"origin":33676,"position":3},"title":"William Optics ZenithStar 61\/360 APO II OTA","author":"Info telescoop","date":"15-11-2025","format":false,"excerpt":"William Optics ZenithStar 61 II, scope OTA: compact FPL-53 apochromat 61\/360 f\/5.9 for astrophotography and visual use. Supplied with tube rings, Arca\/Vixen dovetail, and 2 to 1.25 inch adapter.","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-61-360-ZS61-II-Apochromatische-refractor-ZenithStar-OTA-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":34085,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-flat61r-61-field-flattener-zenithstar\/","url_meta":{"origin":33676,"position":4},"title":"William Optics Flat61R 61 Field Flattener for ZenithStar","author":"Info telescoop","date":"16-11-2025","format":false,"excerpt":"William Optics Flat61R flattener for the ZenithStar 61 and GuideStar 61: adjustable M54 connection, M48 camera side, and integrated M48 filter thread. Round stars all the way to the corners.","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-Flat61R-61-Beeldveldegalisator-voor-ZenithStar-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":34064,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-61mm-2-4-inch-apo-guide-star-guidescope-rood\/","url_meta":{"origin":33676,"position":5},"title":"William Optics 61 mm 2.4\" APO Guide Star Guidescope Red","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics GuideStar 61 apo guidescope (rood) met FPL-53-objectief: nauwkeurige guiding voor refractors van 700 tot 1200 mm. Inclusief Vixen-rail 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-Guidescope-Guide-Star-Apo61-6.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/33676","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=33676"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97213"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33676"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33676"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33676"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}