{"id":29111,"date":"2025-09-22T10:43:20","date_gmt":"2025-09-22T08:43:20","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=29111"},"modified":"2026-03-13T11:40:57","modified_gmt":"2026-03-13T10:40:57","slug":"optolong-pro-veil-sii-filter-3nm-2-inch","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/optolong-pro-veil-sii-filter-3nm-2-inch\/","title":{"rendered":"Optolong Pro Veil SII Filter 3nm 2 inch"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Optolong Filters Pro Veil SII 3nm 2\u201d is designed for astrophotographers seeking maximum contrast when capturing faint nebular structures. This narrowband filter is specifically tuned to the sulfur II (SII) emission line around 672 nm and effectively blocks unwanted stray light and light pollution. The result: finer details and higher signal-to-noise ratio at long exposures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to the extremely narrow bandwidth of 3 nm, only the most relevant photons are passed through. This makes the filter particularly suitable for photography from areas with moderate to heavy light pollution. In combination with H-alpha and OIII filters, this SII filter forms the basis for the well-known Hubble palette (SHO), which allows you to take colorful and scientifically inspired astrophotos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Optolong's high-quality multilayer coating ensures high transmission in the transmission range and strong suppression of adjacent spectral lines. The glass is optically polished for maximum sharpness so that even at fast telescopes (f\/3 - f\/4) there are no perceptible distortions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application<\/strong><br>This filter is ideal for astrophotographers who want to capture emission nebulae such as the Veil Nebula or Crab Nebula with maximum detail reproduction. It is especially useful when photographing from light-polluted areas or when using narrow-band techniques for the SHO palette. For optimal results, use it in combination with H-alpha and OIII filters.<\/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>Type: Narrowband filter<\/li>\n\n\n\n<li>Emission line: SII (672 nm)<\/li>\n\n\n\n<li>Bandwidth: 3 nm (FWHM)<\/li>\n\n\n\n<li>Diameter: 2\u2033 (50.8 mm)<\/li>\n\n\n\n<li>Suitable for: Astrophotography of emission nebulae, especially in SHO combination<\/li>\n\n\n\n<li>Coating: Multiple anti-reflection coating, high transmission<\/li>\n\n\n\n<li>Housing: CNC-machined aluminum filter cell<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<article class=\"w-full text-token-text-primary focus-visible:outline-2 focus-visible:outline-offset-[-4px]\" dir=\"auto\" data-testid=\"conversation-turn-35\" data-scroll-anchor=\"true\">\n<div class=\"text-base my-auto mx-auto py-[18px] px-6\">\n<div class=\"mx-auto flex flex-1 text-base gap-4 md:gap-5 lg:gap-6 md:max-w-3xl lg:max-w-[40rem] xl:max-w-[48rem]\">\n<div class=\"group\/conversation-turn relative flex w-full min-w-0 flex-col agent-turn @xs\/thread:px-0 @sm\/thread:px-1.5 @md\/thread:px-4\">\n<div class=\"flex-col gap-1 md:gap-3\">\n<div class=\"flex max-w-full flex-col flex-grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 whitespace-normal break-words text-start [.text-message+&amp;]:mt-5\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"28a009d2-3136-4224-8ee5-30c9a1a2ece5\" data-message-model-slug=\"gpt-4o\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[3px]\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<p data-start=\"315\" data-end=\"733\">\u00a0<\/p>\n<p data-start=\"147\" data-end=\"313\">Optolong Filters Pro Veil SII 3nm 2&#8221; wordt geleverd met een nauwkeurig afgestemd smalbandfilter voor detailrijke opname van emissienevels.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"featured_media":29116,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1548],"product_cat":[56,587,588,3138],"product_tag":[],"class_list":["post-29111","product","type-product","status-publish","has-post-thumbnail","product_brand-optolong","product_cat-telescoop-accessoires","product_cat-camera-accessoires","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":92618,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-veil-sii-filter-3nm-2-inch-narrowband\/","url_meta":{"origin":29111,"position":0},"title":"Omegon Pro Veil SII Filter 3nm (2 inch)","author":"","date":"06-01-2026","format":false,"excerpt":"Omegon Pro Veil SII Filters comes with SII 3nm narrowband filter in 2\" aluminum mount, high-quality glass coating and protection box - ideal for capturing sulfur radiation in emission nebulae, supernova remnants and planetary nebulae in 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-SII-3nm-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-SII-3nm-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-SII-3nm-2-2.jpg?resize=525%2C300&ssl=1 1.5x, 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astrophotography.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters OIII 3nm 2\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-OIII-3nm-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-OIII-3nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-OIII-3nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-OIII-3nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-OIII-3nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-OIII-3nm-2-.jpg?resize=1400%2C800&ssl=1 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