{"id":30208,"date":"2025-10-06T11:13:25","date_gmt":"2025-10-06T09:13:25","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=30208"},"modified":"2026-03-13T11:26:13","modified_gmt":"2026-03-13T10:26:13","slug":"baader-c2-swan-band-filter-15nm-1-25-inches","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/baader-c2-swan-band-filter-15nm-1-25-inch\/","title":{"rendered":"Baader C2 Swan-Band Filter 15nm 1.25 inches"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The Baader Filters C2 Swan-Band 15nm 1.25\u2033 is a unique narrowband filter specifically designed to capture the characteristic <strong>C2 Swan emission line<\/strong> around 514 nm. This emission is typical of <strong>carbon-rich comets and diffuse nebulae<\/strong> where C2 molecules emit visible light.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The filter allows only a narrow bandwidth of 15 nanometers to pass through, effectively suppressing interfering background light and light pollution. This creates a <strong>exceptionally high contrast<\/strong> between the nebula and the dark sky background - ideal for astrophotographers who want to capture the fine structures of gas and dust nebulae.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to the <strong>Baader hard coating technology<\/strong> and the fully parfocalized 1.25\u2033 mount, this filter delivers optimum transmission and long durability without shifting of the central wavelength. The filter glass layers are resistant to moisture, oxidation and scratches, making the filter suitable for intensive use under various conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application:<\/strong><br>The Baader C2 Swan-Band 15nm is ideal for astrophotographers who want to focus on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Comet photography with emphasis on the greenish C2 structures.<\/li>\n\n\n\n<li>Mists with dominant Swan emission bands.<\/li>\n\n\n\n<li>Deep-sky images where light pollution must be reduced.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The filter is compatible with all 1.25\u2033 filter wheels and adapter rings, and produces the best results with high-sensitivity cameras in the green spectrum.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specifications:<\/strong><br>Filter type: Narrowband filter (C2 Swan-Band)<br>Wavelength: 514 nm (C2 emission line)<br>Bandwidth (FWHM): 15 nm<br>Transmission:&gt;90%<br>Barrel size: 1.25\u2033<br>Optically flat glass with hard coating<br>Parfocal: Yes<br>Housing: Aluminum, black anodized<br>Application: comet and deep-sky photography<br>Light pollution suppression: High<br>Country of origin: Germany<\/p>","protected":false},"excerpt":{"rendered":"<p data-start=\"55\" data-end=\"289\">Baader Filters C2 Swan-Band 15nm 1.25\u2033 comes with protective filter box - specialized narrowband filter for capturing carbon nebulae (C2 Swan emission) in comet and deep-sky photography.<\/p>\n<p data-start=\"291\" data-end=\"608\">\u00a0<\/p>","protected":false},"featured_media":30210,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[541],"product_cat":[587,469,588,56],"product_tag":[],"class_list":["post-30208","product","type-product","status-publish","has-post-thumbnail","product_brand-baader","product_cat-camera-accessoires","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":30217,"url":"https:\/\/staging.telescoop.nl\/en\/baader-c2-swan-band-filter-15nm-2-inch\/","url_meta":{"origin":30208,"position":0},"title":"Baader C2 Swan-Band Filter 15nm 2 inch","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters C2 Swan-Band 15nm 2\" wordt geleverd met beschermende filterdoos \u2013 professioneel smalbandfilter voor het vastleggen van C2 Swan-emissielijnen bij kometen en nevels met maximale lichttransmissie. \u00a0 \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters C2 Swan-Band 15nm 2\"\n\n","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":30226,"url":"https:\/\/staging.telescoop.nl\/en\/baader-narrowband-oiii-filter-cmos-f-2-highspeed-1-25-inch\/","url_meta":{"origin":30208,"position":1},"title":"Baader Narrowband OIII Filter CMOS f\/2 Highspeed 1.25 inches","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters OIII CMOS f\/2 Highspeed 1,25\" wordt geleverd met beschermende filterdoos \u2013 smalbandfilter geoptimaliseerd voor snelle telescopen tot f\/2 voor maximale contrasten bij OIII-nevels. \u00a0 \u00a0 \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters OIII CMOS f\/2 Highspeed 1,25\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":30275,"url":"https:\/\/staging.telescoop.nl\/en\/baader-narrowband-h-alpha-filter-cmos-f-2-highspeed-1-25-inch\/","url_meta":{"origin":30208,"position":2},"title":"Baader Narrowband H-alpha Filter CMOS f\/2 Highspeed 1.25 inches","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters H-alpha CMOS f\/2 Highspeed 1.25\" comes with protective filter box - narrowband filter for deep H\u03b1 emission nebulae at fast telescopes up to f\/2. \u00a0 \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters H-alpha CMOS f\/2 Highspeed 1,25\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-H-alpha-CMOS-f-2-Highspeed-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":90685,"url":"https:\/\/staging.telescoop.nl\/en\/sky-watcher-1-25-inch-uhc-filter\/","url_meta":{"origin":30208,"position":3},"title":"Sky-Watcher 1.25\u2033 UHC Filter","author":"","date":"30-11-2025","format":false,"excerpt":"Skywatcher UHC 1 wordt geleverd met 1,25\" UHC-nevelfilter in aluminium vatting \u2013 ideaal om lichtvervuiling te onderdrukken en zwakke nevels met hoger contrast waar te nemen, zowel visueel als fotografisch. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-UHC-1-Filters-25-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-UHC-1-Filters-25-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-UHC-1-Filters-25-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-UHC-1-Filters-25-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30325,"url":"https:\/\/staging.telescoop.nl\/en\/baader-narrowband-sii-filter-cmos-f-2-highspeed-1-25-inch\/","url_meta":{"origin":30208,"position":4},"title":"Baader Narrowband SII Filter CMOS f\/2 Highspeed 1.25 inches","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters SII CMOS f\/2 Highspeed 1.25\" comes with protective filter box - narrowband filter tuned for the sulfur-emission line (SII) at 672.4 nm, optimized for fast f\/2 telescopes. \u00a0 \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters SII CMOS f\/2 Highspeed 1,25\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-f-2-Highspeed-SII-CMOS-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":34143,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-40mm-2-swan-oculair\/","url_meta":{"origin":30208,"position":5},"title":"William Optics 40mm 2\u2033 SWAN Eyepiece","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 40mm 2\" comes with 72\u00b0 field of view, multicoating, 5-lens system, folding eyecup, filter thread and 2\" connection - ultimate viewing experience for deep sky observations.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-40mm-2-SWAN-Oculair.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-40mm-2-SWAN-Oculair.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-40mm-2-SWAN-Oculair.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-40mm-2-SWAN-Oculair.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/30208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=30208"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/30210"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=30208"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=30208"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=30208"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=30208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}