{"id":15365,"date":"2025-07-06T19:46:29","date_gmt":"2025-07-06T17:46:29","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=15365"},"modified":"2026-08-25T15:09:45","modified_gmt":"2026-08-25T13:09:45","slug":"zwo-ir-blocking-filter-d25","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/zwo-ir-blocking-filter-d25\/","title":{"rendered":"ZWO IR-blocking filter D25"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>ZWO IR-blocking filter D25: sharpness and sensor protection for refractors<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This interference filter blocks infrared light and protects the sensor of your ZWO ASI camera from dust and moisture. With refractors, it prevents the focus of visible and infrared light from diverging, which without a filter results in soft star edges and color fringing. The result: sharp images with pure colors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For reflecting telescopes, the ZWO Clear Filter D25 suffices as a cover; mirrors do not have IR focus shift.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>90% transmission in the visible spectrum<\/li>\n\n\n<li>Blocks infrared and prevents focus differences<\/li>\n\n\n<li>Protects the sensor from dust, moisture, and scratches<\/li>\n\n\n<li>Multicoating minimaliseert verlies en halo&#8217;s rond sterren<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Geschikt voor ZWO ASI-camera&#8217;s met D25-venster en M42-aansluiting. Monteer als eerste element op de camera of in het filterwiel; combineer met smalband- of kleurfilters voor extra contrast.<\/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>Format<\/strong><\/td><td>D25 (M42 x 0.75)<\/td><\/tr><tr><td><strong>Filter type<\/strong><\/td><td>IR-blocking interference filter<\/td><\/tr><tr><td><strong>Transmission<\/strong><\/td><td>90% in the visible spectrum<\/td><\/tr><tr><td><strong>Coating<\/strong><\/td><td>multicoating, anti-reflection<\/td><\/tr><tr><td><strong>Glass thickness<\/strong><\/td><td>2 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The D25-size refractor filter of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/zwo\/\">ZWO<\/a>. For the smaller window, there is the D21 version.<\/p>","protected":false},"excerpt":{"rendered":"<p>IR-blocking filter in D25 format (M42) with 90% visible light transmission. Protects the sensor and prevents focus shift caused by infrared light in refracting telescopes.<\/p>","protected":false},"featured_media":21122,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[123],"product_cat":[3136,588,56],"product_tag":[],"class_list":["post-15365","product","type-product","status-publish","has-post-thumbnail","product_brand-zwo","product_cat-correctiefilters-uv-ir-cut","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":15362,"url":"https:\/\/www.telescoop.nl\/en\/zwo-ir-blocking-filter-d21\/","url_meta":{"origin":15365,"position":0},"title":"ZWO IR-blocking filter D21","author":"","date":"06-07-2025","format":false,"excerpt":"IR-blocking filter in D21 format (M42) with 90% visible light transmission. Protects the sensor and prevents focus shift caused by infrared light in refracting telescopes.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO IR-Sperrfilter D21","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Blocking-filters-IR-ASI-D21.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":15337,"url":"https:\/\/www.telescoop.nl\/en\/zwo-helderglasfilter-d21\/","url_meta":{"origin":15365,"position":1},"title":"ZWO Clear Glass Filter D21","author":"","date":"05-07-2025","format":false,"excerpt":"Helderglasfilter D21 met 95% transmissie en M42-schroefdraad. Beschermt de sensor van je ZWO ASI-camera tegen stof en vocht zonder invloed op het beeld.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO Klarglasfilter D21","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D21.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":15341,"url":"https:\/\/www.telescoop.nl\/en\/zwo-helderglasfilter-d25\/","url_meta":{"origin":15365,"position":2},"title":"ZWO Clear Glass Filter D25","author":"","date":"05-07-2025","format":false,"excerpt":"D25 clear glass filter with 95% transmission and M42 thread. Protects the sensor of your ZWO ASI camera from dust and moisture without affecting the image.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO Klarglasfilter D25","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Helderglasfilter-ASI-D25.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":14833,"url":"https:\/\/www.telescoop.nl\/en\/zwo-blocking-filters-uv-ir-125\/","url_meta":{"origin":15365,"position":3},"title":"ZWO Blocking Filters UV\/IR 1.25\u2033","author":"","date":"23-06-2025","format":false,"excerpt":"UV\/IR-cut filter 1.25 inch: lets only visible light pass through for sharper stars and pure colors with color cameras without a built-in IR-cut filter.","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\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":25245,"url":"https:\/\/www.telescoop.nl\/en\/omegon-blocking-filter-infraroodfilter-125\/","url_meta":{"origin":15365,"position":4},"title":"Omegon Blocking Filter Infrared Filter 1.25\u2033","author":"","date":"07-08-2025","format":false,"excerpt":"\u00a0 Omegon Blocking Filter Infrared Filter 1.25\" - blocks unwanted IR radiation in photography and visual observation, for sharper images and better color correction.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Blocking Filter Infraroodfilter 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Blocking-filters-Infrared-band-elimination-filter.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":14836,"url":"https:\/\/www.telescoop.nl\/en\/zwo-filters-ir-passeerfilter-125-inch\/","url_meta":{"origin":15365,"position":5},"title":"ZWO Filters IR pass filter 1.25 inches","author":"","date":"23-06-2025","format":false,"excerpt":"IR-pass filter 1.25 inch: blocks visible light and lets infrared above 850 nm pass through. For sharper moon and planet images in turbulent skies.","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\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/06\/ZWO-Blocking-filters-UV-IR-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/15365","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=15365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/21122"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=15365"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=15365"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=15365"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=15365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}