{"id":33881,"date":"2025-11-15T13:41:55","date_gmt":"2025-11-15T12:41:55","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=33881"},"modified":"2026-03-04T17:02:31","modified_gmt":"2026-03-04T16:02:31","slug":"william-optics-zenithstar-73-430-apo-gold-ota","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-zenithstar-73-430-apo-gold-ota\/","title":{"rendered":"William Optics ZenithStar 73\/430 APO Gold OTA"},"content":{"rendered":"

William Optics AP 73\/430 73 - Compact apo for bright images<\/strong><\/h3>\n\n\n\n

The William Optics AP 73\/430 73<\/strong> is a lightweight, compact apochromatic refractor. It is ideal for traveling astronomers and astrophotographers. You easily mount it on a lightweight mount such as a Star Adventurer or Star Tracker. Within minutes you are ready to observe or photograph.<\/p>\n\n\n\n

\n
\"William<\/figure>\n<\/figure>\n\n\n\n

Wide-angle images with sharpness to the edge<\/strong><\/h3>\n\n\n\n

The 73 mm aperture and 430 mm focal length give a wide, bright image. With an optional flattener, stars remain sharp to the corners. This allows you to capture entire star fields without distortion. You can also take beautiful wide-angle shots of the Moon and use filters to capture the Sun.<\/p>\n\n\n\n

Sharp and clean thanks to high-quality lens<\/strong><\/h3>\n\n\n\n

The doublet lens provides excellent color correction. Stars and planets appear sharp and without unwanted purple edges. You'll see details that smaller or lower-quality telescopes miss.<\/p>\n\n\n\n

Stable and easy to use<\/strong><\/h3>\n\n\n\n

Focuser with 1:10 fine adjustment lets you focus accurately. Aluminum tube and sturdy tube rings keep everything stable. Convenient accessories such as a Bahtinov mask and prism clamp make focusing and alignment even easier.<\/p>\n\n\n\n

Ideal for astrophotography and nature observation<\/strong><\/h3>\n\n\n\n

The ZS73 fits perfectly on DSLR cameras and compact mounts. Lightweight and easy to carry, so you can take excellent shots while traveling or under dark sky fields.<\/p>\n\n\n\n

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

Optics<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Type<\/td>Refractor<\/td><\/tr>
Design<\/td>Apochromat<\/td><\/tr>
Lens Design<\/td>Doublet<\/td><\/tr>
Aperture (mm)<\/td>73<\/td><\/tr>
Focal length (mm)<\/td>430<\/td><\/tr>
Aperture ratio (f\/)<\/td>5,9<\/td><\/tr>
Resolution<\/td>1,58\u2033<\/td><\/tr>
Limit value (mag)<\/td>11,1<\/td><\/tr>
Light output<\/td>110\u00d7<\/td><\/tr>
Max. useful magnification<\/td>146\u00d7<\/td><\/tr>
Tube material<\/td>Aluminum<\/td><\/tr>
Tube construction<\/td>Full tube<\/td><\/tr>
Tube length (mm)<\/td>310<\/td><\/tr>
Tube weight (kg)<\/td>2,5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Focuser<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Design<\/td>Rack<\/td><\/tr>
Free opening (mm)<\/td>64<\/td><\/tr>
Reduction<\/td>1:10 finesse<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mount<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Type of mount<\/td>Without mount<\/td><\/tr>
Design<\/td>OTA<\/td><\/tr>
GoTo steering<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Included accessories<\/strong><\/h4>\n\n\n\n
Section<\/th>Description<\/th><\/tr><\/thead>
Transport bag<\/td>Yes<\/td><\/tr>
Tube Rings<\/td>Yes<\/td><\/tr>
Dovetail<\/td>Vixen-Style<\/td><\/tr>
Dew cap<\/td>Yes<\/td><\/tr>
Focusing aid<\/td>Bahtinov Mask<\/td><\/tr>
Accessory shoe<\/td>Prism Clamp<\/td><\/tr>
Handle<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

General<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Series<\/td>ZenithStar<\/td><\/tr>
Color<\/td>Gold<\/td><\/tr>
Recommended for<\/td>Advanced<\/td><\/tr>
Observatory use<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

William Optics AP 73\/430 73 comes with tube rings, Vixen-Style dovetail, handle with prism clamp, Bahtinov mask and a soft carrying case, ideal for mobile astrophotography. \u00a0<\/p>","protected":false},"featured_media":97373,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[51,567],"product_tag":[],"class_list":["post-33881","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":[{"id":34116,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-71-73-zenithstar-transporttas\/","url_meta":{"origin":33881,"position":0},"title":"William Optics 71 & 73 ZenithStar Transport Bag","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 71 & 73 wordt geleverd met stevige buitenkant, ritssluiting en handgrepen \u2013 ontworpen om het originele schuimrubberen inzetstuk van je ZenithStar-telescoop veilig te vervoeren.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-71-73-ZenithStar-Transporttas.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-71-73-ZenithStar-Transporttas.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-71-73-ZenithStar-Transporttas.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-71-73-ZenithStar-Transporttas.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":34300,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-flat73a-flattener-voor-zenithstar-73\/","url_meta":{"origin":33881,"position":1},"title":"William Optics Flat73A Flattener for ZenithStar 73","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics Flat73A comes with M63 telescope connector, M48 camera thread, adjustable back focus, scale and gold cap - designed specifically for the ZenithStar 73.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flattener-Flat73A-voor-ZenithStar-73-5.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flattener-Flat73A-voor-ZenithStar-73-5.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flattener-Flat73A-voor-ZenithStar-73-5.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Flattener-Flat73A-voor-ZenithStar-73-5.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33894,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-zenithstar-81-559-apo-wifd-red-ota\/","url_meta":{"origin":33881,"position":2},"title":"William Optics ZenithStar 81\/559 APO WIFD Red OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics AP 81\/559 81 wordt geleverd met een WIFD interne focuser, buisringen, Arca-Swiss & Vixen-style zwaluwstaart, handvat, Bahtinov-masker, adapters en een zachte draagtas. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Red-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Red-OTA-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Red-OTA-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Red-OTA-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33886,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-zenithstar-81-559-apo-wifd-goud-ota\/","url_meta":{"origin":33881,"position":3},"title":"William Optics ZenithStar 81\/559 APO WIFD Gold OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics AP 81\/559 81 wordt geleverd met een WIFD interne focuser, buisringen, Arca-Swiss & Vixen-style zwaluwstaart, handvat, Bahtinov-masker, adapters en een zachte draagtas. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Goud-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Goud-OTA-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Goud-OTA-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-559-81-Apochromatische-refractor-ZenithStar-WIFD-Goud-OTA-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33784,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-91-540-refractor-apo-space-gray-ota\/","url_meta":{"origin":33881,"position":4},"title":"William Optics 91\/540 Refractor APO Space Gray OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 91\/540 comes with retractable dew cap, Bahtinov focus mask, Losmandy swallowtail, sturdy handle, 1:10 rack-and-pinion focuser and deluxe transport bag - ideal for sharp visual observation and astrophotography. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33917,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-pleiades-68-260-apo-astrograph-ota\/","url_meta":{"origin":33881,"position":5},"title":"William Optics Pleiades 68\/260 APO Astrograph OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics 68 AP 68\/260 comes with an integrated 7-element corrector, WIDF internal focuser, Bahtinov mask, transport bag, Vixen-style dovetail, handle and M48 and M54 camera adapters. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-68-AP-68-260-Apochromatische-refractor-Pleiades-Astrograph-OTA-6.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-68-AP-68-260-Apochromatische-refractor-Pleiades-Astrograph-OTA-6.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-68-AP-68-260-Apochromatische-refractor-Pleiades-Astrograph-OTA-6.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-68-AP-68-260-Apochromatische-refractor-Pleiades-Astrograph-OTA-6.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/33881","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=33881"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97373"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33881"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33881"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33881"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33881"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}