{"id":92532,"date":"2026-01-05T19:45:22","date_gmt":"2026-01-05T18:45:22","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=92532"},"modified":"2026-10-13T11:15:00","modified_gmt":"2026-10-13T09:15:00","slug":"omegon-pro-cls-filter-2-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-cls-filter-2-inch\/","title":{"rendered":"Omegon Pro CLS Filter 2 inch"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Omegon Pro CLS Filter 2 inch: Keeping nebulae visible in the city<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Omegon Pro CLS filter makes nebulae and star clusters visible in places where artificial light normally washes them out. It blocks the interfering part of the spectrum, thereby increasing the contrast between the object and the background.<\/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\/2026\/01\/Omegon-Filters-Pro-CLS-filter-2-2.jpg\" alt=\"Omegon Pro CLS filter 2 inch with interference coating\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-CLS-filter-2-.jpg\" alt=\"Omegon Pro CLS filter 2 inch with interference coating\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Filters-Pro-CLS-filter-2-1.jpg\" alt=\"Omegon Pro CLS filter 2 inch with interference coating\" title=\"\"><\/figure><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Bright image without significant light loss<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Many filters enhance contrast by blocking a lot of light, resulting in a dark image. This filter hardly dims the object, allowing you to maintain a bright and natural image through the eyepiece while contrast increases. As a result, even telescopes starting from 70 mm still show a clear difference.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Interference Engineering<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The coating only transmits the wavelengths that are relevant for nebula observation. Less stray light means a cleaner image, which also makes the filter usable for photography from light-polluted environments.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Featured accessories<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fits 2-inch eyepieces and 2-inch adapters. In combination with a filter wheel, you can quickly switch between this filter and your narrowband filters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">For whom yes and for whom no<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u2713 Observers in or near the city<\/li><li>\u2713 Owners of small to medium-sized telescopes<\/li><li>\u2713 Who works both visually and photographically<\/li><li>\u2717 Those looking for the sharpest contrast gain on planetary nebulae: that is OIII<\/li><li>Observers under a truly dark sky<\/li><\/ul>\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>CLS interference filter<\/td><\/tr><tr><td><strong>Mount<\/strong><\/td><td>2 inches<\/td><\/tr><tr><td><strong>Material mount<\/strong><\/td><td>Anodized aluminum<\/td><\/tr><tr><td><strong>Observation goals<\/strong><\/td><td>Visual and photographic<\/td><\/tr><tr><td><strong>Recommended opening<\/strong><\/td><td>From approximately 70 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this brand at the <a href=\"\/en\/brands\/omegon\/\">Omegon brand page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>CLS filter with interference coating that blocks artificial light without dimming the image. Increases the contrast of nebulae, even with smaller telescopes.<\/p>","protected":false},"featured_media":98899,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3139,56],"product_tag":[],"class_list":["post-92532","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-lichtvervuilingsfilters-light-pollution","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":107904,"url":"https:\/\/www.telescoop.nl\/en\/telescoop-set-voor-sterrenstelsels-en-nevels-deep-sky-pakket\/","url_meta":{"origin":92532,"position":0},"title":"Telescope set for galaxies and nebulae \u2013 Deep Sky package","author":"Info telescoop","date":"04-05-2026","format":false,"excerpt":"Unleash the full potential of deep space and distant galaxies. This set around the powerful 200\/1200 Dobson telescope is optimized for deep-sky observations. By combining the large light output of the 8-inch mirror with two ultra-hot narrowband filters, you unveil details in gas clouds that remain invisible without these tools! Light Cannon: 200mm\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Dobson Teleskop Advanced X N 203\/1000","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-203-1200.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":92606,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-veil-oiii-filter-7nm-2-inch-narrowband\/","url_meta":{"origin":92532,"position":1},"title":"Omegon Pro Veil OIII Filter 7nm 2 inch","author":"","date":"06-01-2026","format":false,"excerpt":"OIII narrowband filter from the Pro Veil series with a 7nm passband. Suppresses light pollution and skyglow, and separates oxygen nebulae from the background.","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\/01\/Omegon-Filters-Pro-Veil-OIII-7nm-2-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":25011,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-cls-lichtvervuilingsfilter-2-inch\/","url_meta":{"origin":92532,"position":2},"title":"Omegon Pro CLS Light pollution filter 2 inch","author":"","date":"07-08-2025","format":false,"excerpt":"CLS filter that selectively suppresses city lighting while simultaneously transmitting the emission lines of nebulae. It barely dims the image, making it suitable for smaller telescopes as well.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro CLS Lichtvervuilingsfilter 2 inch","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-CLS-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-CLS-filter-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-CLS-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-CLS-filter-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-CLS-filter-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-CLS-filter-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":90679,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-1-25-inch-light-pollution-filter\/","url_meta":{"origin":92532,"position":3},"title":"Sky-Watcher 1.25 inch Light Pollution Filter","author":"Info telescoop","date":"30-11-2025","format":false,"excerpt":"Broadband light pollution filter in 1.25 inch: suppresses the light from street lighting and keeps stars and nebulae bright. Usable visually and photographically.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-CLS-1-Filters-Light-Polution-25-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":28954,"url":"https:\/\/www.telescoop.nl\/en\/optolong-filters-clip-filter-voor-nikon-full-frame-uhc\/","url_meta":{"origin":92532,"position":4},"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":92532,"position":5},"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":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/92532","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=92532"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98899"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=92532"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=92532"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=92532"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=92532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}