{"id":25236,"date":"2025-08-07T17:07:27","date_gmt":"2025-08-07T15:07:27","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=25236"},"modified":"2026-03-20T13:07:20","modified_gmt":"2026-03-20T12:07:20","slug":"omegon-pro-sii-7nm-filter-125","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-sii-7nm-filter-125\/","title":{"rendered":"Omegon Pro SII 7nm Filter 1.25\u2033"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Omegon Pro SII 7nm Filter 1.25\u2033<\/strong> is a professional narrow-band filter for astrophotography, designed to pass only light with a wavelength around 672 nanometers - the emission line of ionized sulfur (SII). This wavelength, along with H-alpha and OIII, forms the classic basis of the Hubble palette, which is used to image deep structures in nebulae colorfully and with scientific accuracy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to its very narrow bandwidth of 7 nanometers, the filter is extremely effective at suppressing unwanted light, such as from the moon or artificial lighting. This results in extremely high contrast even when shooting from suburban areas. The high transmission in the SII range makes it possible to clearly capture faint sulfur emissions in, for example, the Rosette Nebula or the Lobster Nebula.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The filter is encased in a rugged 1.25\u2033 aluminum mount, fully compatible with filter wheels and camera accessories that support this size. The optical glass features multiple anti-reflection coatings for maximum signal output and minimal stray light.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages<\/strong><br>\u2713 Isolates the SII spectrum (672 nm) for accurate neural recordings<br>\u2713 Only 7 nm wide - optimal contrast under any sky<br>\u2713 Indispensable in narrowband astrophotography (Hubble palette)<br>\u2713 Works with all 1.25\u2033 filter wheels and camera adapters<br>\u2713 High transmission, low reflection - for sharp and clean image<\/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<\/li>\n\n\n\n<li><strong>Connection:<\/strong> 1.25 inches (31.75 mm)<\/li>\n\n\n\n<li><strong>Transmission band:<\/strong> Center at 672 nm, 7 nm wide<\/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 of emission nebulae (sulfur-II)<\/li>\n\n\n\n<li><strong>Not suitable for:<\/strong> Visual perception<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Observation goals<\/strong><br>The Omegon Pro SII 7nm Filter 1.25\u2033 is intended for serious astrophotographers working with a monochrome camera and narrowband workflow. Combine this filter with H-alpha and OIII for full Hubble palette shots, showing detailed structures in complex nebulae such as the Veil Nebula or the Cone Nebula. An indispensable extension for any advanced setup<\/p>","protected":false},"excerpt":{"rendered":"<p data-start=\"273\" data-end=\"717\">\u00a0<\/p>\n<p data-start=\"116\" data-end=\"271\">Omegon Pro SII 7nm Filter 1.25\u2033 - narrowband filter for astrophotography in the sulfur II spectrum, ideal for Hubble palette shots.<\/p>","protected":false},"featured_media":25196,"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-25236","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","sale","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":107604,"url":"https:\/\/www.telescoop.nl\/en\/televue-tele-pod-advanced-azimutale-montering\/","url_meta":{"origin":25236,"position":0},"title":"TeleVue Tele-Pod Advanced \u2013 Azimuth Mount","author":"Abdullah Ibrar","date":"28-04-2026","format":false,"excerpt":"TeleVue Tele-Pod Advanced \u2013 azimutale montering wordt geleverd met aluminium statief, transporttas en biedt soepele bediening voor lichte telescopen. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Montering Tele-Pod Advanced close-up van de azimutale montagekop op zwart geanodiseerd aluminium statief met blauwe accentring op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Montering-Tele-Pod-Advanced-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Montering-Tele-Pod-Advanced-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Montering-Tele-Pod-Advanced-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Montering-Tele-Pod-Advanced-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":105543,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-skyline-travel-70\/","url_meta":{"origin":25236,"position":1},"title":"Levenhuk Skyline Travel 70 - 70\/400 Refractor","author":"Abdullah Ibrar","date":"03-04-2026","format":false,"excerpt":"The Levenhuk Skyline Travel 70 \u2013 70\/400 Refractor comes with 10mm and 20mm eyepieces, a 3x Barlow lens, a 5x24 finderscope, a diagonal prism, an aluminum tripod, and a backpack. This compact travel telescope is ideal for observing the Moon, bright planets, and nature.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk Skyline Travel 70 compact refractor with included backpack for easy transportation","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/levenhuk-telescope-skyline-travel-70_ZHSMksd_500_784c0dc006013c7ff5ad43e1c4c51569.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":104875,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-labzz-t3\/","url_meta":{"origin":25236,"position":2},"title":"Levenhuk LabZZ T3 - 60\/700 Refractor","author":"Abdullah Ibrar","date":"24-03-2026","format":false,"excerpt":"Levenhuk LabZZ T3 - 60\/700 Refractor comes with 4mm eyepiece, 12.5mm eyepiece, 1.5x eyepiece, 3x Barlow lens, 5x optical viewfinder, zenith mirror and aluminum tripod with accessory tray.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk LabZZ T3 - 60\/700 Refractor aluminium statief met accessoirebak","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/03\/Levenhuk-LabZZ-T3-60700-Refractor-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":106246,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-discovery-spark-767-az\/","url_meta":{"origin":25236,"position":3},"title":"Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian Reflector","author":"Abdullah Ibrar","date":"05-04-2026","format":false,"excerpt":"The Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian reflector comes with SR4mm, H12.5mm, and H20mm eyepieces, a 2x Barlow lens, an optical finder, an aluminum tripod with an accessory tray, and the colorful knowledge book \u201cSpace. Not an Empty Void.\u201d Ideal for beginners who want to discover the Moon, planets, and deep-sky objects.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk Discovery Spark 767 AZ complete set met Newton-reflector op alt-azimut montering en aluminium statief op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/79071_discovery-spark-767-az-telescope_00_500_8a8d4daec6536c85fe839f5bcbed1b02.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":105495,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-new-skyline-pro-16\/","url_meta":{"origin":25236,"position":4},"title":"Levenhuk New Skyline PRO 16\u2033 \u2013 406\/1830 Dobson","author":"Abdullah Ibrar","date":"03-04-2026","format":false,"excerpt":"The Levenhuk New Skyline PRO 16\" \u2013 406\/1830 Dobson comes with 10 mm and 25 mm Pl\u00f6ssl eyepieces, an 8x40 optical finderscope, and a primary mirror cooling system. This very powerful telescope is ideal for observing the Moon, planets, and extremely detailed deep-sky objects.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk New Skyline PRO 16 inch main setup with optical tube on Dobsonian mount","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/86287_levenhuk-new-skyline-pro-16-telescope_00_500_465f630cb432cbffc2c1740e1897afbc.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":105023,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-blitz-50-base\/","url_meta":{"origin":25236,"position":5},"title":"Levenhuk Blitz 50 BASE \u2013 50\/600 Refractor","author":"Abdullah Ibrar","date":"01-04-2026","format":false,"excerpt":"The Levenhuk Blitz 50 BASE \u2013 50\/600 Refractor comes with 6mm and 20mm eyepieces, a 3x Barlow lens, a 5x24 finder scope, a diagonal mirror, and an aluminum tripod. This user-friendly beginner telescope is ideal for observing the Moon, bright objects, and simple daytime nature observation.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk Blitz 50 BASE achromatic refractor on a fully extended aluminum tripod, showing the complete setup from the front.","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/77098_levenhuk-blitz-50-base-telescope_00.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/77098_levenhuk-blitz-50-base-telescope_00.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/77098_levenhuk-blitz-50-base-telescope_00.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/77098_levenhuk-blitz-50-base-telescope_00.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/77098_levenhuk-blitz-50-base-telescope_00.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/25236","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=25236"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/25196"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=25236"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=25236"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=25236"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=25236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}