{"id":25242,"date":"2025-08-07T17:12:23","date_gmt":"2025-08-07T15:12:23","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=25242"},"modified":"2026-03-20T13:07:19","modified_gmt":"2026-03-20T12:07:19","slug":"omegon-pro-sii-ccd-filter-2-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-sii-ccd-filter-2-inch\/","title":{"rendered":"Omegon Pro SII CCD Filter 2 inch"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Omegon Pro SII CCD Filter 2<\/strong> inch is a professional narrowband filter for astrophotographers working with large sensors and high resolution. The filter targets the SII emission line of ionized sulfur around 672 nanometers - a crucial part of the classic Hubble palette. It allows you to capture faint filament structures and details in emission nebulae that remain completely invisible without a filter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With a bandwidth of approximately 6-7 nanometers, this filter is capable of delivering exceptionally high contrast even in moderate light pollution. Moonlight, artificial light and unwanted starlight components are effectively suppressed, while high-transmission sulfur emission is allowed through. Ideal for shots of nebulae such as the Horsehead Nebula, IC 443 (Jellyfish), and the Rosette Nebula.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to its 2\u2033 size, the filter is compatible with full-frame filter wheels and telescope systems with wide optical paths. The robust mount and high-quality multiple coating ensure maximum image quality and minimal reflection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages<\/strong><br>\u2713 Optimized for sulfur-II emission (672 nm)<br>\u2713 Indispensable for Hubble palette narrowband photography<br>\u2713 Extremely high contrast - even under light pollution<br>\u2713 2\u2033 version - suitable for large sensors and filter wheels<br>\u2713 Multiple coating for maximum transmission and minimum reflection<\/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 SII filter (for CCD\/CMOS)<\/li>\n\n\n\n<li><strong>Connection:<\/strong> 2 inches (50.8 mm)<\/li>\n\n\n\n<li><strong>Transmission band:<\/strong> Center at 672 nm, bandwidth about 6-7 nm<\/li>\n\n\n\n<li><strong>Mounting:<\/strong> Black anodized aluminum with fine threads<\/li>\n\n\n\n<li><strong>Coating:<\/strong> Multiple anti-reflective<\/li>\n\n\n\n<li><strong>Application:<\/strong> Astrophotography with monochrome cameras<\/li>\n\n\n\n<li><strong>Not suitable for:<\/strong> Visual observation or color cameras without narrowband sensitivity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Observation goals<\/strong><br>The Omegon Pro SII CCD Filter 2\u2033 is an essential filter for advanced astrophotographers working with a monochrome camera who want to utilize the full narrowband spectrum. Perfect in combination with H-alpha and OIII filters for capturing nebulae with scientific depth and aesthetic results. Excellent for use under both dark and urban skies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p data-start=\"286\" data-end=\"727\">\u00a0<\/p>\n<p data-start=\"113\" data-end=\"284\">Omegon Pro SII CCD Filter 2 inches - narrowband filter for astrophotography in the sulfur-II spectrum, optimized for full-frame monochrome cameras.<\/p>","protected":false},"featured_media":25223,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3138,587,588,56],"product_tag":[],"class_list":["post-25242","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-imaging-filters-smalband-en-lrgb","product_cat-camera-accessoires","product_cat-filters","product_cat-telescoop-accessoires","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":25239,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-sii-ccd-filter-125\/","url_meta":{"origin":25242,"position":0},"title":"Omegon Pro SII CCD Filter 1.25\u2033","author":"","date":"07-08-2025","format":false,"excerpt":"\u00a0 Omegon Pro SII CCD Filter 1,25\" \u2013 smalbandfilter voor monochrome camera\u2019s, geoptimaliseerd voor het zwavel-II spectrum (672 nm).","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro SII CCD Filter 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-SII-CCD-filter-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":25236,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-sii-7nm-filter-125\/","url_meta":{"origin":25242,"position":1},"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\/www.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\/www.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\/www.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\/www.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\/www.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\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-Filter-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29111,"url":"https:\/\/www.telescoop.nl\/en\/optolong-pro-veil-sii-filter-3nm-2-inch\/","url_meta":{"origin":25242,"position":2},"title":"Optolong Pro Veil SII Filter 3nm 2 inch","author":"","date":"22-09-2025","format":false,"excerpt":"\u00a0 The Optolong Filters Pro Veil SII 3nm 2'' comes with a precisely tuned narrowband filter for detailed imaging of emission nebulae.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters Pro Veil SII 3nm 2''","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29093,"url":"https:\/\/www.telescoop.nl\/en\/optolong-sii-filter-2-inch\/","url_meta":{"origin":25242,"position":3},"title":"Optolong SII Filter 2 inch","author":"","date":"20-09-2025","format":false,"excerpt":"\u00a0 The Optolong SII Filter 2\" comes with an aluminum housing and a narrow bandwidth around 672 nm \u2013 a specialized narrowband filter for emission nebulae and narrowband astrophotography.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters SII Filter 2\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":30325,"url":"https:\/\/www.telescoop.nl\/en\/baader-narrowband-sii-filter-cmos-f-2-highspeed-1-25-inch\/","url_meta":{"origin":25242,"position":4},"title":"Baader Narrowband SII Filter CMOS f\/2 Highspeed 1.25 inches","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters SII CMOS f\/2 Highspeed 1.25\" comes with protective filter box - narrowband filter tuned for the sulfur-emission line (SII) at 672.4 nm, optimized for fast f\/2 telescopes. \u00a0 \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters SII CMOS f\/2 Highspeed 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":32644,"url":"https:\/\/www.telescoop.nl\/en\/ioptron-sii-125-filters\/","url_meta":{"origin":25242,"position":5},"title":"iOptron SII 1.25\u2033 Filters","author":"","date":"06-11-2025","format":false,"excerpt":"iOptron SII 1.25\" Filters comes with 7 nm narrowband sulfur emission filter in aluminum mount - ideal for astrophotography of emission and planetary nebulae with monochrome cameras.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/25242","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=25242"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/25223"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=25242"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=25242"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=25242"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=25242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}