{"id":34082,"date":"2025-11-16T16:33:32","date_gmt":"2025-11-16T15:33:32","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=34082"},"modified":"2026-03-20T10:40:31","modified_gmt":"2026-03-20T09:40:31","slug":"william-optics-75-110mm-bahtinov-mask","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-75-110mm-bahtinov-mask\/","title":{"rendered":"William Optics 75-110mm Bahtinov Mask"},"content":{"rendered":"

Fast focusing without effort<\/strong><\/h3>\n\n\n\n

The William Optics 75-110mm Bahtinov mask helps you find the right focus instantly. You place the mask on your telescope and immediately see clear lines in the image. So you know exactly when you are in focus. You don't have to guess or gamble - you see it right away.<\/p>\n\n\n\n

\n
\"i.<\/figure>\n<\/figure>\n\n\n\n

Clear image even for faint stars<\/strong><\/h3>\n\n\n\n

The mask is made of optical acrylic glass with 92% light transmission. This keeps your image clear, allowing you to focus on faint stars as well. You can see the pattern more clearly, making focusing faster and your shot instantly sharp.<\/p>\n\n\n\n

Stronger pattern for even more precision<\/strong><\/h3>\n\n\n\n

The imprinted Bahtinov pattern provides three times more bending than standard metal masks. That means the lines are further apart and stay more visible. You determine your focus more accurately and avoid blurred stars in your photos.<\/p>\n\n\n\n

\n
\"ii.<\/figure>\n<\/figure>\n\n\n\n

Fits perfectly on small telescopes<\/strong><\/h3>\n\n\n\n

The focus mask works on telescopes from 75 to 110 mm. Ideal for small refractors and compact travel setups. You snap it on, focus and start shooting immediately - simply and reliably.<\/p>\n\n\n\n

Specifications<\/strong><\/h3>\n\n\n\n

General<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Color<\/td>Transparent<\/td><\/tr>
Material<\/td>Acrylic<\/td><\/tr>
Diameter (mm)<\/td>75-110<\/td><\/tr>
Type<\/td>Mask<\/td><\/tr>
Design<\/td>Focus mask (Bahtinov)<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

William Optics 75-110mm Focus mask Bahtinov comes as a high quality focus mask made of optical acrylic glass with 92% light transmission, providing an approx. three times brighter diffraction image than classic metal masks. \u00a0<\/p>","protected":false},"featured_media":97508,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[3115,56],"product_tag":[],"class_list":["post-34082","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-focusing","product_cat-telescoop-accessoires","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":34075,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-172-235mm-bahtinov-focusmasker\/","url_meta":{"origin":34082,"position":0},"title":"William Optics 172-235mm Bahtinov Focus Mask","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics 172-235mm Focus mask Bahtinov comes with adjustable mounting pins for telescopes from 172 to 235mm diameter. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":34079,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-243-308mm-bahtinov-focusmasker\/","url_meta":{"origin":34082,"position":1},"title":"William Optics 243-308 mm Bahtinov Focus Mask","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics 243-308mm comes as a high-quality focus mask made of optical acrylic glass with a light transmittance of 92%, providing an approx. three times brighter diffraction image than classic metal masks. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":34072,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-105-148mm-bahtinov-focusmasker\/","url_meta":{"origin":34082,"position":2},"title":"William Optics 105-148mm Bahtinov Focus Mask","author":"","date":"16-11-2025","format":false,"excerpt":"William Optics 105-148mm Focus mask Bahtinov comes with adjustable mounting pins for telescopes from 105 to 148mm diameter. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":33843,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-granturismo-81-478-apo-iv-ota-grey\/","url_meta":{"origin":34082,"position":3},"title":"William Optics GranTurismo 81\/478 APO IV OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics AP 81\/478 81 comes with a Vixen-Style dovetail, handle, Bahtinov mask, 2\" to 1.25\" adapter and a soft carrying case, ideal for mobile astrophotography. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":33829,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-granturismo-81-478-apo-iv-gold-ota\/","url_meta":{"origin":34082,"position":4},"title":"William Optics GranTurismo 81\/478 APO IV Gold OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics AP 81\/478 81 comes with a Vixen-Style dovetail, handle, Bahtinov mask, 2\" to 1.25\" adapter and a soft carrying case, ideal for mobile astrophotography. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":33717,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-blackcat-91-448-apo-wifd-ota\/","url_meta":{"origin":34082,"position":5},"title":"William Optics BlackCat 91\/448 APO WIFD OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 91\/448 91 comes with a rotator, tilt lens, M48 and M54 adapters, a versatile dovetail rod, a protective nylon carrying case and a Bahtinov mask integrated into the objective cap for perfect focusing. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/34082","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=34082"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97508"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=34082"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=34082"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=34082"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=34082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}