![\"William](\"https:\/\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-350-71-Apochromatische-refractor-RedCat-WIFD-1.jpg\" "\\"\\"")
<\/figure>\n<\/figure>\n\n\n\nFast and efficient<\/h3>\n\n\n\n
With an f\/4.9 aperture, the lens captures a lot of light.That means shorter exposures<\/strong>, less noise and more detail in your photos.Whether you are photographing star fields or animals, your images remain clear and vivid.<\/p>\n\n\n\n The Petzval design uses four lenses that correct the image.The result is a flat field of view of 48 mm<\/strong>.You don't need a separate corrector and your photos stay sharp from edge to edge.<\/p>\n\n\n\n The helical focuser lets you focus quietly by turning the ring.Even with a heavier camera, everything remains stable.The built-in Bahtinov mask helps you focus perfectly and clicks easily into the objective hood.<\/p>\n\n\n\n The included 21 cm dovetail can be attached in three ways:via thread, Arca-Swiss or Vixen stand.So you can easily put it on a photo tripod, star tracker or astronomical mount.<\/p>\n\n\n\n The RedCat 71 combines optical performance with a sturdy, beautiful finish.The nylon carrying case makes transport easy and protects your telescope on the go.You get a compact, lightweight and professional instrument that lasts a long time.<\/p>\n\n\n\n William Optics AP 71\/350 71 comes with a protective nylon carrying case, a Bahtinov mask built into the objective hood for perfect focusing, and a versatile Arca-Swiss & Vixen-Style dovetail for easy mounting. \u00a0<\/p>","protected":false},"featured_media":97234,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[51,567],"product_tag":[],"class_list":["post-33699","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescopen","product_cat-refractors","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":[],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/33699","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=33699"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97234"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33699"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33699"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33699"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Flat image without additional accessories<\/h3>\n\n\n\n
![\"William](\"https:\/\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-350-71-Apochromatische-refractor-RedCat-WIFD-8.jpg\" "\\"\\"")
<\/figure>\n<\/figure>\n\n\n\nEasy focusing<\/h3>\n\n\n\n
Fits virtually any mount<\/h3>\n\n\n\n
Durable and stylish<\/h3>\n\n\n\n
Specifications<\/strong><\/h1>\n\n\n\n
Optics<\/h3>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Type<\/td> Refractor<\/td><\/tr> Design<\/td> Apochromat<\/td><\/tr> Aperture (mm)<\/td> 71<\/td><\/tr> Focal length (mm)<\/td> 350<\/td><\/tr> Focal Ratio (f\/)<\/td> 4,9<\/td><\/tr> Resolution<\/td> 1,94\u2033<\/td><\/tr> Limit value (mag)<\/td> 12,3<\/td><\/tr> Light output<\/td> 100<\/td><\/tr> Max. useful magnification<\/td> 142\u00d7<\/td><\/tr> Tube weight (kg)<\/td> 4,3<\/td><\/tr> Tube length (mm)<\/td> 427<\/td><\/tr> Tube material<\/td> Aluminum<\/td><\/tr> Coating<\/td> Multiple<\/td><\/tr> Tube construction<\/td> Full tube<\/td><\/tr> Dew cap diameter (mm)<\/td> 98<\/td><\/tr> Lens Design<\/td> Quadruplet<\/td><\/tr> Glass material<\/td> OHARA FPL-53<\/td><\/tr> Corrected field of view (mm)<\/td> 48<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Focuser<\/h3>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Tilt adapter<\/td> Yes<\/td><\/tr> Design<\/td> Helical<\/td><\/tr> Camera connection<\/td> M48<\/td><\/tr> Backfocus (mm)<\/td> 59<\/td><\/tr> Free opening (mm)<\/td> 45<\/td><\/tr> Rotatable<\/td> Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Mount<\/h3>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Design<\/td> OTA<\/td><\/tr> Type of mount<\/td> Without<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Included accessories<\/h3>\n\n\n\n
Section<\/th> Description<\/th><\/tr><\/thead> Dew cap<\/td> Yes<\/td><\/tr> Transport bag<\/td> Yes<\/td><\/tr> Bahtinov mask<\/td> Yes<\/td><\/tr> Dovetail<\/td> Arca-Swiss & Vixen-Style<\/td><\/tr> Tripod screw<\/td> Yes<\/td><\/tr> Corrector<\/td> Integrated<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n General<\/h3>\n\n\n\n
Feature<\/th> Description<\/th><\/tr><\/thead> Series<\/td> Cat<\/td><\/tr> Color<\/td> Red<\/td><\/tr> Application<\/td> Astrophotography, Moon & Planets, Nature observation, Deep-sky<\/td><\/tr> Sun<\/td> No (only with appropriate filters)<\/td><\/tr> Recommended for<\/td> Advanced<\/td><\/tr> Observatory use<\/td> No<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"