{"id":90693,"date":"2025-11-30T16:58:35","date_gmt":"2025-11-30T15:58:35","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90693"},"modified":"2026-08-23T15:10:54","modified_gmt":"2026-08-23T13:10:54","slug":"skywatcher-oiii-1-filters-25","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/skywatcher-oiii-1-filters-25\/","title":{"rendered":"Sky-Watcher 1.25 inch O-III Filter"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Sky-Watcher 1,25 inch O-III Filter: het specialistenfilter voor planetaire nevels<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Het O-III filter laat uitsluitend het licht van tweevoudig geioniseerde zuurstof door (496 en 501 nm), precies de lijnen waarin planetaire nevels en supernovaresten stralen. Al het overige licht wordt geblokkeerd: de achtergrond wordt diepzwart en de nevel springt eruit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-OIII-1-Filters-25-2.jpg\" alt=\"Skywatcher OIII 1 O-III 1.25-inch line filter in black aluminum mount with blue-green glass.\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-OIII-1-Filters-25-1.jpg\" alt=\"Skywatcher OIII 1 transmission curve graph showing transmittance at 496 and 501 nm and suppressed background light.\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">De Ringnevel, Halternevel en vooral de Sluiernevel tonen met O-III detail dat zonder filter onbereikbaar is. Het filter komt het best tot zijn recht op telescopen vanaf circa 150 tot 200 mm opening; op kleine openingen wordt het beeld te donker.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Line filter: transmits only 496 and 501 nm<\/li>\n\n\n<li>Maximaal contrast op planetaire nevels en supernovaresten<\/li>\n\n\n<li>Multi-coated, aluminum mount<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Screws into the filter thread of 1.25 inch eyepieces and accessories. Usable for visual and photographic purposes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Type<\/strong><\/td><td>O-III line filter<\/td><\/tr><tr><td><strong>Mount<\/strong><\/td><td>1.25 inches<\/td><\/tr><tr><td><strong>Steeping material<\/strong><\/td><td>Aluminum<\/td><\/tr><tr><td><strong>Use<\/strong><\/td><td>Visual and photographic<\/td><\/tr><tr><td><strong>Central wavelengths<\/strong><\/td><td>496 to 501 nm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The disassembly of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/sky-watcher\/\">Sky-Watcher<\/a> is a base that will last you for years. Unsure which mount is best for your telescope and your goals? Contact us, we'd be happy to help you decide.<\/p>","protected":false},"excerpt":{"rendered":"<p>O-III lijnfilter in 1,25 inch: laat alleen de zuurstoflijnen op 496 en 501 nm door, voor maximaal contrast op planetaire nevels en supernovaresten zoals de Sluiernevel.<\/p>","protected":false},"featured_media":98140,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[3138,469,588,56],"product_tag":[],"class_list":["post-90693","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-imaging-filters-smalband-en-lrgb","product_cat-astro-fotografie","product_cat-filters","product_cat-telescoop-accessoires","product_shipping_class-licht","first","outofstock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"outofstock","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":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":90693,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"De ZWO Seestar S50 Pro is de opvolger van de Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), twee 4K-sensoren van 8,3 MP, een groothoekcamera van 63 graden voor de Melkweg tot 8K, drie ingebouwde filters, 10.000 mAh accu (tot 9 uur) en 128 GB opslag. Vier opnamemodi voor\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO Seestar S50 Pro hero","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/90693","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=90693"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98140"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=90693"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=90693"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=90693"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=90693"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}