{"id":25224,"date":"2025-08-07T16:57:34","date_gmt":"2025-08-07T14:57:34","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=25224"},"modified":"2026-03-03T20:21:07","modified_gmt":"2026-03-03T19:21:07","slug":"omegon-pro-oiii-7nm-filter-125","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-oiii-7nm-filter-125\/","title":{"rendered":"Omegon Pro OIII 7nm Filter 1.25\u2033"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Omegon Pro OIII 7nm Filter 1.25\u2033<\/strong> is an advanced narrowband filter that passes only the light from double ionized oxygen (OIII), with a bandwidth of only 7 nanometers. This precise cutoff eliminates virtually all unwanted wavelengths, including light pollution, moonlight and broadband starlight - while allowing the OIII light from emission nebulae to pass through perfectly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to the 7 nm bandwidth, you can see much finer details than with standard OIII filters. Filaments, edges and structures in objects such as the Veil Nebula, Helix Nebula or the Ring Nebula become visible with impressive contrast. This makes the filter particularly suitable for deep-sky observers working under moderately to heavily polluted skies as well as for astrophotographers taking narrowband shots with monochrome or color cameras.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 1.25\u2033 version is compatible with all common eyepieces and filter wheels. The optics are coated with multiple anti-reflection coating for maximum light transmission within the desired range and minimal stray light.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages<\/strong><br>\u2713 Only 7 nm bandwidth - extremely high contrast operation<br>\u2713 Selective OIII filter - ideal for emission nebulae and supernova remnants<br>\u2713 Dramatically reduces light pollution and background noise<br>\u2713 Suitable for visual observation as well as astrophotography<br>\u2713 Compatible with any 1.25\u2033 eyepiece or filter wheel<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specifications<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Type:<\/strong> Narrowband OIII filter (7 nm)<\/li>\n\n\n\n<li><strong>Connection:<\/strong> 1.25 inches (31.75 mm)<\/li>\n\n\n\n<li><strong>Mounting:<\/strong> Aluminum, black anodized with fine threads<\/li>\n\n\n\n<li><strong>Coating:<\/strong> Multiple anti-reflective<\/li>\n\n\n\n<li><strong>Transmission band:<\/strong> 496-501 nm (OIII), 7 nm wide<\/li>\n\n\n\n<li><strong>Application:<\/strong> Visual and photographic use in emission nebulae<\/li>\n\n\n\n<li><strong>Not suitable for:<\/strong> Planetary observation or broadband purposes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application<\/strong><br>The Omegon Pro OIII 7nm Filter 1.25\u2033 is ideal for serious observers and astrophotographers who want to isolate emission nebulae from all interfering light sources. Use it visually on a telescope from 150 mm for ultimate contrast, or combine it in an LRGB or narrowband stack for photography of deep sky objects. <\/p>","protected":false},"excerpt":{"rendered":"<p data-start=\"294\" data-end=\"721\">\u00a0<\/p>\n<p data-start=\"117\" data-end=\"292\">Omegon Pro OIII 7nm Filter 1.25\u2033 - high-quality narrowband filter for maximum detail reproduction of emission nebulae in visual observation and astrophotography.<\/p>","protected":false},"featured_media":25211,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[56,587,3137,588,3138],"product_tag":[],"class_list":["post-25224","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-telescoop-accessoires","product_cat-camera-accessoires","product_cat-deep-sky-filters","product_cat-filters","product_cat-imaging-filters-smalband-en-lrgb","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":25236,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-sii-7nm-filter-125\/","url_meta":{"origin":25224,"position":0},"title":"Omegon Pro SII 7nm Filter 1.25\u2033","author":"","date":"07-08-2025","format":false,"excerpt":"\u00a0 Omegon Pro SII 7nm Filter 1,25\" \u2013 smalbandfilter voor astrofotografie in het zwavel-II spectrum, ideaal voor Hubble-palet opnamen.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro SII 7nm Filter 1,25\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":92596,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-veil-h-alpha-oiii-filter-7nm-2-inch\/","url_meta":{"origin":25224,"position":1},"title":"Omegon Pro Veil H-Alpha OIII Filter 7nm (2 inch)","author":"","date":"06-01-2026","format":false,"excerpt":"Omegon Pro Veil H-Alpha OIII Filters comes with 2\" line filter in aluminum housing, protection box and high transmission for detail-rich emission nebula observations - ideal for light-polluted skies and astrophotography.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-H-Alpha-OIII-7nm-2-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-H-Alpha-OIII-7nm-2-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-H-Alpha-OIII-7nm-2-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-H-Alpha-OIII-7nm-2-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":92606,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-veil-oiii-filter-7nm-2-inch-narrowband\/","url_meta":{"origin":25224,"position":2},"title":"Omegon Pro Veil OIII Filter 7nm (2 inch)","author":"","date":"06-01-2026","format":false,"excerpt":"Omegon Pro Veil OIII Filters comes with OIII 7nm narrowband filter in 2\u201d aluminum mount, protective box and high-quality glass coating - ideal for deep-sky observation and astrophotography of high-contrast emission nebulae, even in light pollution. \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\/2026\/01\/Omegon-Filters-Pro-Veil-OIII-7nm-2-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-OIII-7nm-2-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-OIII-7nm-2-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-Veil-OIII-7nm-2-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":29165,"url":"https:\/\/staging.telescoop.nl\/en\/optolong-sho-filter-kit-1-25-inch\/","url_meta":{"origin":25224,"position":3},"title":"Optolong SHO Filter Kit 1.25 inch","author":"","date":"22-09-2025","format":false,"excerpt":"\u00a0 Optolong Filters SHO Filter Kit 1,25\" wordt geleverd met drie smalbandfilters (H-alpha, OIII en SII) voor kleurrijke astrofotografie in het Hubble-palet.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters SHO Filter Kit 7nm 2\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":32642,"url":"https:\/\/staging.telescoop.nl\/en\/ioptron-oiii-1-25-inch-filters\/","url_meta":{"origin":25224,"position":4},"title":"iOptron OIII 1.25\u2033 Filters","author":"","date":"06-11-2025","format":false,"excerpt":"iOptron OIII 1.25 comes with precise line filter of 7 nm half-width in aluminum mount - ideal for nebula and deep-sky astrophotography with monochrome cameras.","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\/iOptron-OIII-125-Filters.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/iOptron-OIII-125-Filters.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/iOptron-OIII-125-Filters.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/iOptron-OIII-125-Filters.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":29150,"url":"https:\/\/staging.telescoop.nl\/en\/optolong-sho-filter-kit-7nm-2-inch\/","url_meta":{"origin":25224,"position":5},"title":"Optolong SHO Filter Kit 7nm 2 inch","author":"","date":"22-09-2025","format":false,"excerpt":"\u00a0 Optolong Filters SHO Filter Kit 7nm 2\" wordt geleverd met een complete set smalbandfilters (H-alpha, OIII en SII) voor creatieve nevelopnames in SHO-kleuren.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters SHO Filter Kit 7nm 2\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SHO-Filter-Kit-7nm-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/25224","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=25224"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/25211"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=25224"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=25224"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=25224"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=25224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}