{"id":34143,"date":"2025-11-17T13:22:14","date_gmt":"2025-11-17T12:22:14","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=34143"},"modified":"2026-03-12T08:29:56","modified_gmt":"2026-03-12T07:29:56","slug":"william-optics-40mm-2-swan-eyepiece","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-40mm-2-swan-oculair\/","title":{"rendered":"William Optics 40mm 2\u2033 SWAN Eyepiece"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Step into a bigger picture<\/strong><br>The William Optics 40mm 2\u2033 SWAN eyepiece feels like opening a window to space. The wide 72\u00b0 field of view gives you a relaxed, immersive viewing experience. You see more at a glance, without having to constantly search or move.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-40mm-2-SWAN-Oculair.jpg\" alt=\"William Optics 40mm 2&quot; SWAN eyepiece side view with visible specifications and wide eyecup\" class=\"wp-image-34198\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Clear, calm and comfortable viewing<\/strong><br>The multiple coating keeps your image bright, so that stars and nebulae are shown off beautifully. The lens edges are finished in black, reducing stray light. This makes for calm images, especially with faint objects. With 28 mm eye relief, you'll look comfortable even when wearing glasses. Your eyes remain relaxed even during long observations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Modern design with practical benefits<\/strong><br>The eyepiece uses five carefully designed lens elements. That gives you sharp stars all the way to the edge, keeping your image wide without distortion. The folding eyecup helps you block light and find the perfect viewing position. Thanks to the 2\u2033 connection, the eyepiece fits many telescopes. You easily screw on filters for even more detail, for example on the Moon or bright nebulae.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For anyone who wants to look big<\/strong><br>Whether you want to make the Pleiades sparkle or explore wide nebulae, this eyepiece gives you peace, space and detail. It feels instantly premium, but remains surprisingly accessible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Specifications<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Capacity<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Focal length<\/td><td>40 mm<\/td><\/tr><tr><td>Field of view<\/td><td>72\u00b0<\/td><\/tr><tr><td>Eye relief<\/td><td>28 mm<\/td><\/tr><tr><td>Number of lenses<\/td><td>5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Connections &amp; Optics<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Telescope connection<\/td><td>2\u2033<\/td><\/tr><tr><td>Optics coating<\/td><td>Multiple<\/td><\/tr><tr><td>Adjustable eye cup<\/td><td>Yes (foldable)<\/td><\/tr><tr><td>Homofocal<\/td><td>Yes<\/td><\/tr><tr><td>Filter thread<\/td><td>Yes<\/td><\/tr><tr><td>Inert gas charge<\/td><td>No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>General<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Type<\/td><td>Ocular<\/td><\/tr><tr><td>Design<\/td><td>SWA<\/td><\/tr><tr><td>Weight<\/td><td>570 g<\/td><\/tr><tr><td>Series<\/td><td>SWAN<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>William Optics 40mm 2\u2033 comes with 72\u00b0 field of view, multicoating, 5-lens system, folding eyecup, filter thread and 2\u2033 connector - ultimate viewing experience for deep sky observations.<\/p>","protected":false},"featured_media":97573,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[56,3131],"product_tag":[],"class_list":["post-34143","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","product_cat-telescoop-accessoires","product_cat-groothoek-oculairen-wide-field","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":90430,"url":"https:\/\/staging.telescoop.nl\/en\/sky-watcher-super-plossl-40mm-125\/","url_meta":{"origin":34143,"position":0},"title":"Sky-Watcher Super Pl\u00f6ssl 40mm 1.25\u2033","author":"","date":"29-11-2025","format":false,"excerpt":"Sky-Watcher Super Pl\u00f6ssl wordt geleverd met een Super 40mm 1,25\" SP-oculair met meervoudige coating, omvouwbare rubberen oogschelp en hoog contrast voor breed deepsky- en maanzicht. \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\/Skywatcher-Oculair-Super-Ploessl-40mm-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-Oculair-Super-Ploessl-40mm-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-Oculair-Super-Ploessl-40mm-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-Oculair-Super-Ploessl-40mm-1-25-.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":34147,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series-2\/","url_meta":{"origin":34143,"position":1},"title":"William Optics 400mm Losmandy Swan Series","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 400mm comes with Losmandy-compatible dovetail of 400mm length in gold aluminum - ideal for heavy optical systems 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-4.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-4.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-4.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-4.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":34143,"position":2},"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":34299,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-1-25-inch-binoviewers-met-toebehoren\/","url_meta":{"origin":34143,"position":3},"title":"William Optics Binoviewers with accessories","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics Binoviewers comes with 1.25\" binocular with compression rings, 2x 20 mm eyepieces, 1.6x Barlow lens and storage box - ready for comfortable and razor-sharp binocular viewing.","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-Binoviewers-op-telescoop-te-bevestigen-met-toebehoren-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-Binoviewers-op-telescoop-te-bevestigen-met-toebehoren-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Binoviewers-op-telescoop-te-bevestigen-met-toebehoren-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-Binoviewers-op-telescoop-te-bevestigen-met-toebehoren-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":32345,"url":"https:\/\/staging.telescoop.nl\/en\/bresser-plossl-oculair-40mm-1-25-inch\/","url_meta":{"origin":34143,"position":4},"title":"Bresser Pl\u00f6ssl eyepiece 40mm 1.25 inches","author":"","date":"02-11-2025","format":false,"excerpt":"Bresser Eyepiece Pl\u00f6ssl PL 40mm comes with 1.25\" socket, multiple coating, rubber eyecup and metal housing - ideal for wide, comfortable observations of nebulae and star clusters with a sharp, high-contrast image.","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\/Bresser-Oculair-Plossl-PL-40mm-125.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Plossl-PL-40mm-125.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Plossl-PL-40mm-125.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Plossl-PL-40mm-125.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33836,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-granturismo-81-478-apo-iv-ota-rood\/","url_meta":{"origin":34143,"position":5},"title":"William Optics GranTurismo 81\/478 APO IV OTA Red","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":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-478-81-Apochromatische-refractor-Gran-Turismo-IV-OTAWilliam-Optics-AP-81478-81-Apochromatische-refractor-Gran-Turismo-IV-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-81-478-81-Apochromatische-refractor-Gran-Turismo-IV-OTAWilliam-Optics-AP-81478-81-Apochromatische-refractor-Gran-Turismo-IV-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-81-478-81-Apochromatische-refractor-Gran-Turismo-IV-OTAWilliam-Optics-AP-81478-81-Apochromatische-refractor-Gran-Turismo-IV-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-81-478-81-Apochromatische-refractor-Gran-Turismo-IV-OTAWilliam-Optics-AP-81478-81-Apochromatische-refractor-Gran-Turismo-IV-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/34143","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=34143"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97573"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=34143"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=34143"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=34143"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=34143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}