{"id":34147,"date":"2025-11-17T13:23:07","date_gmt":"2025-11-17T12:23:07","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=34147"},"modified":"2026-03-03T20:21:07","modified_gmt":"2026-03-03T19:21:07","slug":"william-optics-400mm-losmandy-swan-series-2","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series-2\/","title":{"rendered":"William Optics 400mm Losmandy Swan Series"},"content":{"rendered":"

William Optics 400mm - Strong, stable base for your telescope<\/strong><\/h3>\n\n\n\n

The William Optics 400mm<\/strong> gives you a sturdy and reliable way to secure your telescope or accessories. You slide the rail into the clamp, tighten it, and everything is instantly stable. This keeps your image steady, even when you focus or change accessories.<\/p>\n\n\n\n

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

Wide, sturdy and ready for heavier setups<\/strong><\/h3>\n\n\n\n

This Losmandy rail is wider than a standard Vixen rail. As a result, it supports heavier tubes and additional equipment without bending. You especially notice it when you add a camera or tracking scope. Your setup immediately feels more solid and you get a more stable image.<\/p>\n\n\n\n

Flexible for additional accessories<\/strong><\/h3>\n\n\n\n

You don't just use the rail for the telescope. It also works perfectly when you want to mount additional components, such as a tracking scope or a second camera. This way you build your setup exactly the way you want it. Everything stays neatly aligned and secure.<\/p>\n\n\n\n

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

Made for everyday use<\/strong><\/h3>\n\n\n\n

The aluminum makes the rail light but strong. It can take a beating and stays in tight shape even after much use. The gold finish gives it a luxurious look and makes it easily recognizable in your suitcase or under dark skies.<\/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>
Type<\/td>Dovetail<\/td><\/tr>
Design<\/td>Losmandy<\/td><\/tr>
Length (mm)<\/td>400<\/td><\/tr>
Weight (g)<\/td>1400<\/td><\/tr>
Material<\/td>Aluminum<\/td><\/tr>
Color<\/td>gold<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

William Optics 400mm comes with Losmandy-compatible dovetail of 400mm length in gold aluminum - ideal for heavy optical systems and accessories. \u00a0<\/p>","protected":false},"featured_media":97547,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[56,3065,590,538],"product_tag":[],"class_list":["post-34147","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescoop-accessoires","product_cat-dovetails","product_cat-montering-accessoires","product_cat-monteringen","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":34133,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series\/","url_meta":{"origin":34147,"position":0},"title":"William Optics 400mm Losmandy Swan Series","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 400mm comes as a 400mm long Losmandy-style Swan Series dovetail, made of red aluminum for stable mounting of telescopes and accessories. \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-400mm-Losmandy-Swan-Series-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-400mm-Losmandy-Swan-Series-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-400mm-Losmandy-Swan-Series-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-400mm-Losmandy-Swan-Series-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":34161,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series-3\/","url_meta":{"origin":34147,"position":1},"title":"William Optics 400mm Losmandy Swan Series","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 400mm comes with a gray 400mm Losmandy swallowtail plate in high-grade aluminum - suitable for heavy optics and attachment of accessories. \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-400mm-Losmandy-Swan-Series-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-400mm-Losmandy-Swan-Series-6.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-400mm-Losmandy-Swan-Series-6.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-400mm-Losmandy-Swan-Series-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":34147,"position":2},"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":33809,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-fluorostar-120-780-apo-space-gray-ota\/","url_meta":{"origin":34147,"position":3},"title":"William Optics Fluorostar 120\/780 APO Space Gray OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics 120\/780 comes with Bahtinov focus mask, Losmandy swallowtail, handle, Vixen\/Skywatcher accessory shoe and padded transport bag - premium triplet for crystal clear astrophotos and visual excellence. \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-120-780-Apochromatische-refractor-AP-Fluorostar-Space-Gray-OTA-3.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-120-780-Apochromatische-refractor-AP-Fluorostar-Space-Gray-OTA-3.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-120-780-Apochromatische-refractor-AP-Fluorostar-Space-Gray-OTA-3.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-120-780-Apochromatische-refractor-AP-Fluorostar-Space-Gray-OTA-3.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33800,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-fluorostar-120-780-apo-red-ota\/","url_meta":{"origin":34147,"position":4},"title":"William Optics Fluorostar 120\/780 APO Red OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics 120\/780 comes with a Losmandy-style dovetail, handle, a special Bahtinov mask for perfect focusing, a Vixen\/Skywatcher accessory shoe and a soft transport bag for safe storage and transportation. \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-120-780-Apochromatische-refractor-AP-Fluorostar-Red-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-120-780-Apochromatische-refractor-AP-Fluorostar-Red-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-120-780-Apochromatische-refractor-AP-Fluorostar-Red-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-120-780-Apochromatische-refractor-AP-Fluorostar-Red-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":34168,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-vixen-style-zwaluwstaart-dovetail-7-inch\/","url_meta":{"origin":34147,"position":5},"title":"William Optics Vixen-Style Dovetail 7\u2033","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics DSD 210 comes with dual Vixen- and Arca-Swiss-style dovetails, ideal for mounting accessories or telescope tubes.","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-DSD-210-Zwaluwstaart-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-DSD-210-Zwaluwstaart-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-DSD-210-Zwaluwstaart-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-DSD-210-Zwaluwstaart-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/34147","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=34147"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97547"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=34147"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=34147"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=34147"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=34147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}