{"id":15359,"date":"2025-07-06T19:36:47","date_gmt":"2025-07-06T17:36:47","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=15359"},"modified":"2026-08-25T15:09:45","modified_gmt":"2026-08-25T13:09:45","slug":"zwo-h-alpha-sii-oiii-filter-set-36-mm-loose-filters","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/zwo-h-alpha-sii-oiii-filterset-36-mm-losse-filters\/","title":{"rendered":"ZWO H-Alpha SII OIII filter set 36 mm separate filters"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>ZWO H-alpha, SII and OIII filter set 36 mm: narrowband for large sensors<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This set of three unmounted 36 mm narrowband filters captures the emission lines of hydrogen (H-alpha, 656 nm), sulfur (SII, 672 nm), and oxygen (OIII, 501 nm) with a full width at half maximum (FWHM) of 7 nm. Light pollution and moonlight are virtually completely suppressed, making faint structures in HII regions, supernova remnants, and planetary nebulae visible with high contrast.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 36 mm format prevents vignetting with cameras featuring larger sensors, such as the ASI294MM and ASI2600MM series. The filters are parfocal with the ZWO LRGB sets, so you can change channels without refocusing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Three narrow-band filters with 7 nm full width at half maximum<\/li>\n\n\n<li>36 mm format: no vignetting on large single sensors<\/li>\n\n\n<li>Parfocal with ZWO LRGB filters: no refocusing<\/li>\n\n\n<li>Suppresses light pollution and moonlight almost completely<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fits filter wheels with 36 mm slots, such as the ZWO EFW 7x36mm. Designed for monochrome ZWO ASI cameras with large sensors.<\/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>36 mm, unmounted (loose)<\/td><\/tr><tr><td><strong>Filters<\/strong><\/td><td>H-alpha 656 nm, SII 672 nm, OIII 501 nm<\/td><\/tr><tr><td><strong>Half-value width<\/strong><\/td><td>7 nm<\/td><\/tr><tr><td><strong>Transmission<\/strong><\/td><td>80%<\/td><\/tr><tr><td><strong>Glass thickness<\/strong><\/td><td>2 mm<\/td><\/tr><tr><td><strong>Housing<\/strong><\/td><td>aluminum<\/td><\/tr><tr><td><strong>Use<\/strong><\/td><td>photographic, with a single camera<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The 36 mm narrowband set from the filter series of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/zwo\/\">ZWO<\/a>. Combine with the 36 mm LRGB set in an EFW 7x36mm for the complete seven-channel palette.<\/p>","protected":false},"excerpt":{"rendered":"<p>Narrowband set of three standalone 36 mm filters (H-alpha 656 nm, SII 672 nm, OIII 501 nm) with 7 nm bandwidth. For Hubble palette imaging with large mono sensors without vignetting.<\/p>","protected":false},"featured_media":21114,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[123],"product_cat":[3138,3137,588,56],"product_tag":[],"class_list":["post-15359","product","type-product","status-publish","has-post-thumbnail","product_brand-zwo","product_cat-imaging-filters-smalband-en-lrgb","product_cat-deep-sky-filters","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":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":15359,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"De ZWO Seestar S50 Pro is de opvolger van de Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), twee 4K-sensoren van 8,3 MP, een groothoekcamera van 63 graden voor de Melkweg tot 8K, drie ingebouwde filters, 10.000 mAh accu (tot 9 uur) en 128 GB opslag. Vier opnamemodi voor\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO Seestar S50 Pro hero","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/15359","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=15359"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/21114"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=15359"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=15359"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=15359"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=15359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}