{"id":90696,"date":"2025-11-30T17:03:46","date_gmt":"2025-11-30T16:03:46","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90696"},"modified":"2026-10-13T10:53:58","modified_gmt":"2026-10-13T08:53:58","slug":"sky-watcher-2-inch-o-iii-filter","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/sky-watcher-2-inch-o-iii-filter\/","title":{"rendered":"Sky-Watcher 2\" O-III Filter"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Sky-Watcher 2-inch O-III Filter: The Veil Nebula in widescreen<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This O-III line filter exclusively transmits the two oxygen lines at 496 and 501 nm, the light in which planetary nebulae and supernova remnants shine. The rest is blocked, making faint structures appear against a deep black background.<\/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-Filters-OIII-2-1.jpg\" alt=\"Skywatcher OIII 2-inch O-III line filter in black aluminum mount with purple glass, side view.\" 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-Filters-OIII-2-.jpg\" alt=\"Skywatcher OIII transmission curve graph with narrow pass at 496 and 501 nm and background light suppressed.\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Especially in combination with a 2-inch wide-field eyepiece on a large Dobson, O-III truly comes into its own: the entire Veil Nebula in a single view is a classic. Recommended for apertures of approximately 150 to 200 mm and up.<\/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>Ideal with 2-inch widefield eyepieces at large apertures<\/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 2-inch eyepieces and accessories. Suitable for visual and photographic use.<\/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>2 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 line filter in 2 inch: only the oxygen lines at 496 and 501 nm, for maximum nebula contrast in widefield eyepieces and the 2-inch light path.<\/p>","protected":false},"featured_media":98142,"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-90696","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","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":90693,"url":"https:\/\/www.telescoop.nl\/en\/skywatcher-oiii-1-filters-25\/","url_meta":{"origin":90696,"position":0},"title":"Sky-Watcher 1.25 inch O-III Filter","author":"","date":"30-11-2025","format":false,"excerpt":"O-III line filter in 1.25 inch: allows only the oxygen lines at 496 and 501 nm, for maximum contrast on planetary nebulae and supernova remnants such as the Veil Nebula.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-OIII-1-Filters-25-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":32336,"url":"https:\/\/www.telescoop.nl\/en\/televue-bandmate-type-2-oiii-125-lijnfilter\/","url_meta":{"origin":90696,"position":1},"title":"TeleVue Bandmate Type 2 OIII 1.25\u2033 \u2013 Line Filter","author":"Abdullah Ibrar","date":"02-11-2025","format":false,"excerpt":"Bandmate Type 2 1.25-inch OIII filter for maximum contrast on planetary nebulae.","rel":"","context":"Similar post","block_context":{"text":"Similar 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