{"id":33709,"date":"2025-11-14T13:59:32","date_gmt":"2025-11-14T12:59:32","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=33709"},"modified":"2026-05-18T16:10:50","modified_gmt":"2026-05-18T14:10:50","slug":"william-optics-ultracat-76-365-apo-wifd-30th-anniversary-edition-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-ultracat-76-365-apo-wifd-30th-anniversary-edition-ota\/","title":{"rendered":"William Optics UltraCat 76\/365 APO WIFD 30th Anniversary Edition OTA"},"content":{"rendered":"<h3 class=\"wp-block-heading\">Special anniversary edition for discerning photographers<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>William Optics AP 76\/365 76 30th UltraCat<\/strong> celebrates 30 years of innovation.Each telescope is numbered and comes with a certificate and unique laser engraving.With the included <strong>UniGuide 32 mm scope<\/strong> you are immediately ready for astrophotography.<\/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 aligncenter size-large\"><img decoding=\"async\" data-id=\"33710\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-76-365-76-30th-Apochromatische-refractor-UltraCat-WIFD-Anniversary-Edition-7.jpg\" alt=\"William Optics AP 76\/365 76 30th top view of telescope with handle and mounting brackets.\" class=\"wp-image-33710\" title=\"\"><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Powerful and fast<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">With a <strong>76 mm lens and f\/4.8<\/strong> capture a lot of light.That means short exposures and razor-sharp images, even with faint stars.The 5-element Petzval design delivers a <strong>flat 50 mm field of view<\/strong>, perfect for full-frame, APS-C and M4\/3 cameras.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clear and color pure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The optics use Super ED and lanthanum glass.This prevents color casts and ensures sharp stars all the way to the edge of your image.The built-in <strong>Bahtinov mask<\/strong> helps you quickly find the right focus.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" data-id=\"33714\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-76-365-76-30th-Apochromatische-refractor-UltraCat-WIFD-Anniversary-Edition-3.jpg\" alt=\"William Optics AP 76\/365 76 30th close-up from the side with the anniversary logo and WIFD focus buttons.\" class=\"wp-image-33714\" title=\"\"><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Stable and flexible<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>WIFD internal focus system<\/strong> keeps your focus stable, even with heavy cooled cameras.The <strong>Sensor Tilt Xterminator and rotator<\/strong> correct sensor tilt and ensure even focus.The focuser has a scale so you can see position immediately.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Robust and user-friendly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The telescope is built entirely in one tube.No external focusers causing vignetting.You get a light, sturdy and professional instrument that will last for years.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Specifications<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Optics<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Type<\/td><td>Refractor<\/td><\/tr><tr><td>Design<\/td><td>Apochromat<\/td><\/tr><tr><td>Aperture (mm)<\/td><td>76<\/td><\/tr><tr><td>Focal length (mm)<\/td><td>365<\/td><\/tr><tr><td>Focal Ratio (f\/)<\/td><td>4,8<\/td><\/tr><tr><td>Resolution<\/td><td>1,82\u2033<\/td><\/tr><tr><td>Limit value (mag)<\/td><td>11,2<\/td><\/tr><tr><td>Light output<\/td><td>120<\/td><\/tr><tr><td>Max. useful magnification<\/td><td>152\u00d7<\/td><\/tr><tr><td>Tube weight (kg)<\/td><td>4,98<\/td><\/tr><tr><td>Tube length (mm)<\/td><td>415<\/td><\/tr><tr><td>Transport length (mm)<\/td><td>363<\/td><\/tr><tr><td>Tube material<\/td><td>Aluminum<\/td><\/tr><tr><td>Lens Design<\/td><td>Triplet<\/td><\/tr><tr><td>Corrected field of view (mm)<\/td><td>50<\/td><\/tr><tr><td>Coating<\/td><td>Multiple<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Focuser<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Design<\/td><td>Internal<\/td><\/tr><tr><td>Tilt adapter<\/td><td>Yes<\/td><\/tr><tr><td>Adjustment range (mm)<\/td><td>20<\/td><\/tr><tr><td>Rotatable<\/td><td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Mount<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Design<\/td><td>OTA<\/td><\/tr><tr><td>Type of mount<\/td><td>Without<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Included accessories<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Section<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Dew cap<\/td><td>Yes<\/td><\/tr><tr><td>Transport bag<\/td><td>Yes<\/td><\/tr><tr><td>Dovetail<\/td><td>Vixen-Style<\/td><\/tr><tr><td>Corrector<\/td><td>Integrated<\/td><\/tr><tr><td>Focusing aid<\/td><td>Bahtinov mask<\/td><\/tr><tr><td>Seeker<\/td><td>UniGuide 32 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">General<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Series<\/td><td>Cat<\/td><\/tr><tr><td>Observation goals<\/td><td>Astrophotography, Moon &amp; Planets, Nebulae &amp; galaxies<\/td><\/tr><tr><td>Sun<\/td><td>Yes (only with appropriate sunscreens)<\/td><\/tr><tr><td>Recommended for<\/td><td>Advanced<\/td><\/tr><tr><td>Observatory use<\/td><td>No<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>William Optics AP 76\/365 76 30th comes with an integrated corrector, UniGuide 32 mm scope, Bahtinov mask, transport bag and commemorative certificate - the ideal, complete set for the discerning astrophotographer. \u00a0<\/p>","protected":false},"featured_media":97247,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[51,3175,567],"product_tag":[],"class_list":["post-33709","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescopen","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":105495,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-new-skyline-pro-16\/","url_meta":{"origin":33709,"position":0},"title":"Levenhuk 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