{"id":29039,"date":"2025-09-20T19:58:52","date_gmt":"2025-09-20T17:58:52","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=29039"},"modified":"2026-08-25T15:10:45","modified_gmt":"2026-08-25T13:10:45","slug":"optolong-uhc-filter-1-25-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/optolong-uhc-filter-1-25-inch\/","title":{"rendered":"Optolong UHC Filter 1.25 inches"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Optolong UHC Filter 1.25 inch: More contrast on emission nebulae<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">UHC stands for Ultra High Contrast: this filter primarily allows the emission lines of nebulae (including H-beta, OIII, and H-alpha) to pass through while blocking light pollution from streetlights and skyglow. Emission nebulae like the Orion Nebula or the Ring Nebula visibly gain contrast from this, even when viewed through the eyepiece.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Under a light-polluted sky, a UHC filter is often the difference between a faint suspicion of a nebula and truly seeing it.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-Filter-1-25.jpg\" alt=\"Optolong UHC filter 1.25 inch\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-Filter-1-25-2.jpg\" alt=\"Optolong UHC filter 1.25 inch\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-Filter-1-25-1.jpg\" alt=\"Optolong UHC filter 1.25 inch\" title=\"\"><\/figure><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Transmission of the main fog emission lines<\/li><li>Mercury and sodium lighting and skyglow block<\/li><li>For visual and photographic use<\/li><li>Multi-layer coated glass in a thin metal frame<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fits M28.5 x 0.6 thread in eyepieces, diagonal mirrors, and camera nosepieces with 1.25 inch connection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Type<\/strong><\/td><td>UHC nebular contrast filter<\/td><\/tr><tr><td><strong>Size<\/strong><\/td><td>1.25 inches<\/td><\/tr><tr><td><strong>Thread<\/strong><\/td><td>M28.5 x 0.6<\/td><\/tr><tr><td><strong>Observation goals<\/strong><\/td><td>Emission nebulae, visual and photographic<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this merk at the <a href=\"\/en\/brands\/optolong\/\">Optolong merk page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Optolong UHC filter 1.25 inch. Lets nebula emission lines through and blocks light pollution: more contrast on emission nebulae, visually and photographically.<\/p>","protected":false},"featured_media":29048,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1548],"product_cat":[3139,587,588,56],"product_tag":[],"class_list":["post-29039","product","type-product","status-publish","has-post-thumbnail","product_brand-optolong","product_cat-lichtvervuilingsfilters-light-pollution","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":29051,"url":"https:\/\/www.telescoop.nl\/en\/optolong-filters-uhc-filter-2\/","url_meta":{"origin":29039,"position":0},"title":"Optolong UHC Filter 2 inch","author":"","date":"20-09-2025","format":false,"excerpt":"Optolong UHC filter 2 inch. Lets nebulae emission lines pass and blocks light pollution: more contrast on emission nebulae, visual and photographic.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters UHC Filter 2\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-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-UHC-filter-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-filter-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-filter-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-filter-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-UHC-filter-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":107498,"url":"https:\/\/www.telescoop.nl\/en\/televue-nebustar-uhc-125-uhc-filter\/","url_meta":{"origin":29039,"position":1},"title":"TeleVue Nebustar UHC 1.25\" - UHC Filter","author":"Abdullah Ibrar","date":"28-04-2026","format":false,"excerpt":"1.25-inch Nebustar UHC filter as an all-round contrast filter for emission nebulae.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Filters Filter UHC Nebustar 1,25\" zwart 1,25 inch UHC Nebustar filter met lichtgroen glas 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-UHC-Nebustar-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-UHC-Nebustar-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-UHC-Nebustar-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-UHC-Nebustar-1-25-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107510,"url":"https:\/\/www.telescoop.nl\/en\/televue-nebustar-uhc-2-uhc-filter\/","url_meta":{"origin":29039,"position":2},"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":[]},{"id":28954,"url":"https:\/\/www.telescoop.nl\/en\/optolong-filters-clip-filter-voor-nikon-full-frame-uhc\/","url_meta":{"origin":29039,"position":3},"title":"Optolong Filters Clip Filter for Nikon Full Frame UHC","author":"","date":"20-09-2025","format":false,"excerpt":"Optolong UHC clip-on filter for Nikon full frame. Narrower passband than CLS for maximum nebula contrast under light-polluted skies, placed in the camera body in front of the sensor.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters Clip Filter voor Nikon Full Frame UHC","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Nikon-Full-Frame-UHC.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-Clip-Filter-for-Nikon-Full-Frame-UHC.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Nikon-Full-Frame-UHC.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Nikon-Full-Frame-UHC.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Nikon-Full-Frame-UHC.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Nikon-Full-Frame-UHC.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":28945,"url":"https:\/\/www.telescoop.nl\/en\/optolong-filters-clip-filter-voor-canon-eos-full-frame-uhc\/","url_meta":{"origin":29039,"position":4},"title":"Optolong Filters Clip Filter for Canon EOS Full Frame UHC","author":"","date":"20-09-2025","format":false,"excerpt":"Optolong UHC clip filter for Canon EOS full-frame. Narrower passband than CLS for maximum nebula contrast under light-polluted skies, placed in the camera body in front of the sensor.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters Clip Filter voor Canon EOS Full Frame UHC","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-FF-UHC.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-Clip-Filter-for-Canon-EOS-FF-UHC.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-FF-UHC.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-FF-UHC.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-FF-UHC.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-FF-UHC.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":28936,"url":"https:\/\/www.telescoop.nl\/en\/optolong-filters-clip-filter-for-canon-eos-aps-c-uhc\/","url_meta":{"origin":29039,"position":5},"title":"Optolong Filters Clip Filter for Canon EOS APS-C UHC","author":"","date":"20-09-2025","format":false,"excerpt":"Optolong UHC clip-in filter for Canon EOS APS-C. Narrower passband than CLS for maximum nebula contrast under light-polluted skies, placed in the camera body in front of the sensor.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters Clip Filter for Canon EOS APS-C UHC","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-APS-C-UHC.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-Clip-Filter-for-Canon-EOS-APS-C-UHC.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-APS-C-UHC.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-APS-C-UHC.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-APS-C-UHC.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Clip-Filter-for-Canon-EOS-APS-C-UHC.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/29039","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=29039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/29048"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=29039"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=29039"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=29039"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=29039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}