{"id":113386,"date":"2026-10-09T16:55:21","date_gmt":"2026-10-09T14:55:21","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=113386"},"modified":"2026-10-13T11:14:22","modified_gmt":"2026-10-13T09:14:22","slug":"optolong-h-beta-nevelfilter-12-nm-2-inch-for-visual-observation-of-clouds","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/optolong-h-beta-nevelfilter-12-nm-2-inch-voor-visueel-waarnemen-van-nevels\/","title":{"rendered":"Optolong H-Beta nanofilter 12 nm 2 inch for visual observation of fog"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Some faint nebulae shine mainly in the H-beta line of hydrogen and remain almost invisible without a filter. With the Optolong H-beta 2 inch, you only let a narrow band of 12 nm through around that line, so those nebulae become more visible as the background darkens. Well-known targets are the Horsehead Nebula in Orion and the California Nebula in Perseus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 2 inch size is useful if you use 2 inch eyepieces, or if you use the filter in <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/diagonals\/\">a 2 inch diagonal mirror<\/a> screws and combines them with all your eyepieces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Large nebulae like the California Nebula fit better into the image at low magnification with a 2 inch eyepiece. First check that you have diagonal or 2 inch eyepiece filter thread. For more targets for a dark night see <a href=\"https:\/\/www.telescoop.nl\/en\/observe-deep-sky-objects\/\">our guide on deep-sky objects<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you work with 1.25-inch eyepieces only, then <a href=\"https:\/\/www.telescoop.nl\/en\/optolong-h-beta-nevelfilter-12-nm-125-inch-for-the-horse-head-fog\/\">the H-beta in 1.25 inch<\/a> the logical choice.<\/p>","protected":false},"excerpt":{"rendered":"<p>12 nm H-beta filter in 2 inches, for visual observation of clouds that mainly radiate in the H-beta line of hydrogen.<\/p>","protected":false},"featured_media":113383,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1548],"product_cat":[3137,56],"product_tag":[],"class_list":["post-113386","product","type-product","status-publish","has-post-thumbnail","product_brand-optolong","product_cat-deep-sky-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":113385,"url":"https:\/\/www.telescoop.nl\/en\/optolong-h-beta-nevelfilter-12-nm-125-inch-voor-de-paardenkopnevel\/","url_meta":{"origin":113386,"position":0},"title":"Optolong H-Beta new filter 12 nm 1.25 inch for the Horsehead Nebula","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"12 nm H-beta filter in 1.25 inch to better see visually faint nebulae such as the Horsehead Nebula and the California 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\/2026\/10\/87863_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/87863_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/87863_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":107494,"url":"https:\/\/www.telescoop.nl\/en\/televue-bandmate-type-2-h-beta-125-lijnfilter\/","url_meta":{"origin":113386,"position":1},"title":"TeleVue Bandmate Type 2 H-Beta 1.25\" \u2013 Line Filter","author":"Abdullah Ibrar","date":"28-04-2026","format":false,"excerpt":"Baader Planetarium Type 2 H-beta filter 1.25 inch for the Horsehead Nebula and related targets.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Filters Filter H-Beta Bandmate Type 2 1,25\" zwart 1,25 inch H-Beta filter met groene glaslaag en TeleVue Bandmate Type 2 opdruk op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-Type-2-1-25-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-Type-2-1-25-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-Type-2-1-25-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-Type-2-1-25-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":25233,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-h-beta-filter-2-inch\/","url_meta":{"origin":113386,"position":2},"title":"Omegon Pro H-Beta Filter 2 inch","author":"","date":"07-08-2025","format":false,"excerpt":"H-beta filter in 2 inch mounting for wide-field eyepieces. Brings out nebulae like the California Nebula and Horsehead Nebula under a dark sky.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"h-beta filter 2 inch","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-filter-2-.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-H-Beta-filter-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-filter-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-filter-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-filter-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-filter-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":107506,"url":"https:\/\/www.telescoop.nl\/en\/televue-bandmate-type-2-h-beta-2-lijnfilter\/","url_meta":{"origin":113386,"position":3},"title":"TeleVue Bandmate Type 2 H-Beta 2\" - Line Filter","author":"Abdullah Ibrar","date":"28-04-2026","format":false,"excerpt":"Bandmate Type 2 H-beta filter for extended hydrogen nebulae.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Filters Filter H-Beta, Bandmate type 2, 2\" zwart 2 inch H-Beta filter met groen gecoat glas en Bandmate Type 2 opdruk op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-type-2-2-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-type-2-2-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-type-2-2-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-H-Beta-Bandmate-type-2-2-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":25230,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-h-beta-filter-125\/","url_meta":{"origin":113386,"position":4},"title":"Omegon Pro H-Beta 1.25\" Filter","author":"","date":"07-08-2025","format":false,"excerpt":"Specialized H-beta filter around 486 nm that brings objects like the Horsehead Nebula and California Nebula within reach. For experienced observers with a large telescope.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro H-Beta Filter 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-H-Beta-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-H-Beta-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-H-Beta-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-H-Beta-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-H-Beta-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-H-Beta-filter-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":107510,"url":"https:\/\/www.telescoop.nl\/en\/televue-nebustar-uhc-2-uhc-filter\/","url_meta":{"origin":113386,"position":5},"title":"TeleVue Nebustar UHC 2\u2033 \u2013 UHC Filter","author":"Abdullah Ibrar","date":"28-04-2026","format":false,"excerpt":"2-inch Nebustar UHC filter for all-round nebula contrast at wide fields of view.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Filters Filter UHC Nebustar 2\" zwart 2 inch UHC-filter met lichtgroen gecoat glas en Bandmate Type 2 Nebustar opdruk op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-UHC-Nebustar-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-UHC-Nebustar-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-UHC-Nebustar-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Filters-Filter-UHC-Nebustar-2-.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/113386","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=113386"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/113383"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=113386"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=113386"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=113386"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=113386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}