{"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":"2026-05-18T16:10:36","modified_gmt":"2026-05-18T14:10:36","slug":"william-optics-pleiades-111-528-apo-septuplet-astrograph-ota","status":"publish","type":"product","link":"https:\/\/www.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

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\"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

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\"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>
Observation goals<\/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":[51,3175,567],"product_tag":[],"class_list":["post-33903","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":33903,"position":0},"title":"Levenhuk New Skyline PRO 16\u2033 \u2013 406\/1830 Dobson","author":"Abdullah Ibrar","date":"03-04-2026","format":false,"excerpt":"The Levenhuk New Skyline PRO 16\" \u2013 406\/1830 Dobson comes with 10 mm and 25 mm Pl\u00f6ssl eyepieces, an 8x40 optical finderscope, and a primary mirror cooling system. 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