{"id":33903,"date":"2025-11-15T14:10:44","date_gmt":"2025-11-15T13:10:44","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=33903"},"modified":"2026-03-04T16:58:52","modified_gmt":"2026-03-04T15:58:52","slug":"william-optics-pleiades-111-528-apo-septuplet-astrograph-ota","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-pleiades-111-528-apo-septuplet-astrograph-ota\/","title":{"rendered":"William Optics Pleiades 111\/528 APO Septuplet Astrograph OTA"},"content":{"rendered":"

William Optics 111 AP 111\/528 - Fast astrograph for perfect shots<\/strong><\/h3>\n\n\n\n

The William Optics 111 AP 111\/528<\/strong> is a powerful apochromatic refractor designed specifically for astrophotography. With the quadruplet lens and FPL-53 glass, you get sharp, clear images. Full-frame sensors are fully utilized, making stars and nebulae look fantastic.<\/p>\n\n\n\n

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

Photographing quickly and efficiently<\/strong><\/h3>\n\n\n\n

Thanks to the very fast f\/4.8 focal ratio, you can use short exposure times. That means less waiting time and less motion blur. Perfect for deep-sky photography, but also ideal for planets and the Moon.<\/p>\n\n\n\n

Internal focusing system (WIFD)<\/strong><\/h3>\n\n\n\n

The Internal Focus Design lets you focus accurately without external rotations. Even heavy, cooled cameras are no problem. Focusing is smooth and precise, with an integrated scale. Compatible with the ZWO EAF for automatic focusing.<\/p>\n\n\n\n

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

Compact and travel-friendly<\/strong><\/h3>\n\n\n\n

Despite the 111 mm aperture, the telescope remains surprisingly portable. You easily take it with you in the included transport bag. The practical handle and Vixen\/GP prism protection make mounting and transport easy.<\/p>\n\n\n\n

Complete and versatile<\/strong><\/h3>\n\n\n\n

The Pleiades 111 comes with Bahtinov focus mask and adapters for DSLR and CCD cameras (M48 and M54). It supports Canon, Nikon, Sony, Pentax, Fuji and Micro Four Thirds with optional T-adapters. You get a high-quality astrograph that is ready to use immediately.<\/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>Quadruplet<\/td><\/tr>
Aperture (mm)<\/td>111<\/td><\/tr>
Focal length (mm)<\/td>528<\/td><\/tr>
Aperture ratio (f\/)<\/td>4,8<\/td><\/tr>
Resolution<\/td>1,24\u2033<\/td><\/tr>
Limit value (mag)<\/td>12,3<\/td><\/tr>
Light output<\/td>250\u00d7<\/td><\/tr>
Max. useful magnification<\/td>222\u00d7<\/td><\/tr>
Corrected field of view (mm)<\/td>45<\/td><\/tr>
Tube length (mm)<\/td>785<\/td><\/tr>
Transport length (mm)<\/td>645<\/td><\/tr>
Tube weight (kg)<\/td>7,95<\/td><\/tr>
Coating<\/td>SMC multilayer coating<\/td><\/tr>
Stray light baffles<\/td>Yes<\/td><\/tr>
Glass material<\/td>OHARA FPL-53<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Focuser<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Design<\/td>Internal (WIFD)<\/td><\/tr>
Ocular connection<\/td>2\u2033<\/td><\/tr>
Ring clamp<\/td>Yes<\/td><\/tr>
Reduction<\/td>1:10 finesse<\/td><\/tr>
Rotatable<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mount<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Design<\/td>OTA<\/td><\/tr>
Type of mount<\/td>Without mount<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Included accessories<\/strong><\/h4>\n\n\n\n
Section<\/th>Description<\/th><\/tr><\/thead>
Seeker<\/td>Without<\/td><\/tr>
Dew cap<\/td>Yes<\/td><\/tr>
Dovetail<\/td>Vixen-Style<\/td><\/tr>
Miscellaneous<\/td>Bahtinov focus mask<\/td><\/tr>
Handle<\/td>Yes<\/td><\/tr>
Transport bag<\/td>Yes<\/td><\/tr>
Corrector<\/td>Integrated<\/td><\/tr>
Camera adapter<\/td>M54<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

General<\/strong><\/h4>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Color<\/td>Black<\/td><\/tr>
Application<\/td>Astrophotography, Moon & Planets, Nebulae & galaxies<\/td><\/tr>
Recommended for<\/td>Advanced<\/td><\/tr>
Observatory use<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

William Optics 111 AP 111\/528 comes with an integrated 7-lens corrector, WIDF internal focuser, Vixen-Style dovetail, handle, Bahtinov mask, M54 & M48 camera adapters and a soft carrying case. \u00a0<\/p>","protected":false},"featured_media":97390,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[51,567],"product_tag":[],"class_list":["post-33903","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":33917,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-pleiades-68-260-apo-astrograph-ota\/","url_meta":{"origin":33903,"position":0},"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":[]},{"id":33911,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-pleiades-181-998-apo-septuplet-astrograph-ota\/","url_meta":{"origin":33903,"position":1},"title":"William Optics Pleiades 181\/998 APO Septuplet Astrograph OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics 181 AP 181\/998 wordt geleverd met een ge\u00efntegreerde 7-elementen corrector, 3,7\" R&P focuser, Bahtinov masker, transporttas, Losmandy zwaluwstaart, handgreep en M48, M54 en M68 camera-adapters. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u2026","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-181-AP-181-998-Apochromatische-refractor-Pleiades-Astrograph-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-181-AP-181-998-Apochromatische-refractor-Pleiades-Astrograph-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-181-AP-181-998-Apochromatische-refractor-Pleiades-Astrograph-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-181-AP-181-998-Apochromatische-refractor-Pleiades-Astrograph-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33652,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-ap-51-178-apochromatische-refractor-minicat-wifd-ota\/","url_meta":{"origin":33903,"position":2},"title":"William Optics AP 51\/178 Apochromatic refractor MiniCat WIFD OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 51\/178 wordt geleverd met een beschermende nylon draagtas, een ge\u00efntegreerd Bahtinov-masker, dauwkap en een Arca-Swiss & Vixen-Style zwaluwstaart. Deze ultracompacte astrograph is perfect voor op reis en voor astrofotografie met maximale beeldkwaliteit. \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-51178-Apochromatische-refractor-MiniCat-WIFD-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-51178-Apochromatische-refractor-MiniCat-WIFD-OTA-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-51178-Apochromatische-refractor-MiniCat-WIFD-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-51178-Apochromatische-refractor-MiniCat-WIFD-OTA-2.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":33903,"position":3},"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":33699,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-ap-71-350-71-apochromatische-refractor-redcat-wifd\/","url_meta":{"origin":33903,"position":4},"title":"William Optics AP 71\/350 71 Apochromatic refractor RedCat WIFD","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 71\/350 71 wordt geleverd met een beschermende nylon draagtas, een in de objectiefkap ingebouwd Bahtinov-masker voor perfecte scherpstelling, en een veelzijdige Arca-Swiss & Vixen-Style zwaluwstaart voor eenvoudige montage. \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-71-350-71-Apochromatische-refractor-RedCat-WIFD-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-71-350-71-Apochromatische-refractor-RedCat-WIFD-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-350-71-Apochromatische-refractor-RedCat-WIFD-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-71-350-71-Apochromatische-refractor-RedCat-WIFD-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33639,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-ap-108-518-apochromatische-refractor-ultracat-wifd\/","url_meta":{"origin":33903,"position":5},"title":"William Optics AP 108\/518 Apochromatic Refractor UltraCat WIFD","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 108\/518 comes with integrated Petzval corrector, WIFD internal focuser, rotator, tilt lens, Bahtinov mask and Vixen-Style dovetail - ideal for demanding astrophotographers who want perfect flat images up to full-frame size.","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-Apochromatische-refractor-AP-108-518-UltraCat-WIFD-10.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-Apochromatische-refractor-AP-108-518-UltraCat-WIFD-10.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Apochromatische-refractor-AP-108-518-UltraCat-WIFD-10.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Apochromatische-refractor-AP-108-518-UltraCat-WIFD-10.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/33903","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=33903"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97390"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=33903"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=33903"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=33903"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=33903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}