{"id":32644,"date":"2025-11-06T14:44:08","date_gmt":"2025-11-06T13:44:08","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=32644"},"modified":"2026-07-19T20:54:21","modified_gmt":"2026-07-19T18:54:21","slug":"ioptron-sii-125-filters","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/ioptron-sii-125-filters\/","title":{"rendered":"iOptron SII 1.25\" Filters"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>iOptron SII 1,25\" Filters: SII smalbandfilter van 7 nm<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dit smalbandfilter isoleert het dieprode licht van ge\u00efoniseerde zwavel rond 672 nm. Supernovaresten en de zwavelrijke randen van emissienevels tonen hier structuur en textuur die met andere filters verborgen blijft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De halfwaardebreedte van 7 nm blokkeert lichtvervuiling en maanlicht vrijwel volledig, zodat ook dit zwakke kanaal vanuit de stad te fotograferen is.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/iOptron-SII-125-Filters.jpg\" alt=\"iOptron SII 1.25\" title=\"\"><\/figure>\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sluitstuk van het Hubble-palet<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">SII completeert samen met H-alpha en OIII de klassieke SHO-verdeling waarin de Hubble-opnamen zijn gemaakt. De aluminium vatting van 1,25 inch past in gangbare filterwielen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Included<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SII filter, 1,25\" gevat<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Featured accessories<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Combineer met de H-alpha- en OIII-filters van iOptron voor het volledige Hubble-palet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>For whom yes and for whom no<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2713 Monochroomfotografen die het volledige SHO-palet willen opbouwen<\/li>\n\n\n\n<li>\u2717 Beginnende smalbandfotografen: start met H-alpha, dat kanaal geeft het snelste resultaat<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Specifications<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Emission line<\/strong><\/td><td>SII, 672 nm<\/td><\/tr><tr><td><strong>Half-value width<\/strong><\/td><td>7 nm<\/td><\/tr><tr><td><strong>Format<\/strong><\/td><td>1,25 inch, aluminium vatting<\/td><\/tr><tr><td><strong>Observation goals<\/strong><\/td><td>Smalbandfotografie met monochrome camera's<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more mounts and accessories for this merk at the <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/ioptron\/\">iOptron merk page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>iOptron SII lijnfilter 1,25\" met 7 nm halfwaardebreedte rond 672 nm, in aluminium vatting, voor zwavelemissie met monochrome camera's.<\/p>","protected":false},"featured_media":96738,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[2790],"product_cat":[3138,469,588,56],"product_tag":[],"class_list":["post-32644","product","type-product","status-publish","has-post-thumbnail","product_brand-ioptron","product_cat-imaging-filters-smalband-en-lrgb","product_cat-astro-fotografie","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":[32643,32642],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":15356,"url":"https:\/\/www.telescoop.nl\/en\/zwo-h-alpha-sii-oiii-filterset-31-mm-losse-filters\/","url_meta":{"origin":32644,"position":0},"title":"ZWO H-Alpha SII OIII filter set 31 mm loose filters","author":"","date":"06-07-2025","format":false,"excerpt":"Smalbandset van drie losse 31 mm filters (H-alfa 656 nm, SII 672 nm, OIII 501 nm) met 7 nm bandbreedte. Voor Hubble-palet opnames met monocamera's, ook onder stedelijke hemel.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO H-Alpha SII OIII Filtersatz 31 mm lose Filter","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filterset-H-Alpha-SII-OIII-31mm-unmounted.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":15359,"url":"https:\/\/www.telescoop.nl\/en\/zwo-h-alpha-sii-oiii-filterset-36-mm-losse-filters\/","url_meta":{"origin":32644,"position":1},"title":"ZWO H-Alpha SII OIII filter set 36 mm separate filters","author":"","date":"06-07-2025","format":false,"excerpt":"Smalbandset van drie losse 36 mm filters (H-alfa 656 nm, SII 672 nm, OIII 501 nm) met 7 nm bandbreedte. Voor Hubble-palet opnames met grote monosensoren zonder vignettering.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO H-Alpha SII OIII Filtersatz 36 mm lose Filter","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.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-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Filters-Filter-Set-H-alpha-SII-OIII-36mm-unmounted.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":15371,"url":"https:\/\/www.telescoop.nl\/en\/zwo-lijnfilterset-2-inch\/","url_meta":{"origin":32644,"position":2},"title":"ZWO Line Filter Set 2 inch","author":"","date":"06-07-2025","format":false,"excerpt":"Set van drie 2 inch smalbandfilters (H-alfa 656 nm, SII 672 nm, OIII 500 nm) met 7 nm bandbreedte, homofocaal met alle ZWO-filters. Smalbandfotografie tot full-frame formaat.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ZWO Linienfilterset 2 Zoll \u2013 Kontrast f\u00fcr Nebel","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/ZWO-Lijnfilterset-H-alpha-SII-OIII-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29093,"url":"https:\/\/www.telescoop.nl\/en\/optolong-sii-filter-2-inch\/","url_meta":{"origin":32644,"position":3},"title":"Optolong SII Filter 2 inch","author":"","date":"20-09-2025","format":false,"excerpt":"Optolong SII narrowband filter with 6.5 nm passband around 672 nm, 2-inch size. For monochrome narrowband astrophotography of emission nebulae, even under light-polluted skies.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters SII Filter 2\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-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-SII-Filter-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-SII-Filter-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29111,"url":"https:\/\/www.telescoop.nl\/en\/optolong-pro-veil-sii-filter-3nm-2-inch\/","url_meta":{"origin":32644,"position":4},"title":"Optolong Pro Veil SII Filter 3nm 2 inch","author":"","date":"22-09-2025","format":false,"excerpt":"Optolong SII narrowband filter with 3 nm passband around 672 nm, 2-inch size. For monochrome narrowband photography of emission nebulae, even under light-polluted skies.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters Pro Veil SII 3nm 2''","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-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-Pro-Veil-SII-3nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-Pro-Veil-SII-3nm-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":25236,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-sii-7nm-filter-125\/","url_meta":{"origin":32644,"position":5},"title":"Omegon Pro SII 7nm Filter 1.25 inch","author":"","date":"07-08-2025","format":false,"excerpt":"SII-smalbandfilter met 7 nm doorlaat voor astrofotografie in het zwavelkanaal. Combineert met H-alpha en OIII tot een complete Hubble-palet set.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro SII 7nm Filter 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-Pro-OIII-7nm-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-OIII-7nm-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-OIII-7nm-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-OIII-7nm-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-OIII-7nm-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-OIII-7nm-Filter-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/32644","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=32644"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/96738"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=32644"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=32644"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=32644"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=32644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}