{"id":30217,"date":"2025-10-06T11:14:14","date_gmt":"2025-10-06T09:14:14","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=30217"},"modified":"2026-03-20T10:58:00","modified_gmt":"2026-03-20T09:58:00","slug":"baader-c2-swan-band-filter-15nm-2-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/baader-c2-swan-band-filter-15nm-2-inch\/","title":{"rendered":"Baader C2 Swan-Band Filter 15nm 2 inch"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The Baader Filters C2 Swan-Band 15nm 2\u2033 is a high-quality narrowband filter specifically designed to capture the <strong>C2 Swan emission<\/strong> (around 514 nm) that is characteristic of carbon-rich comets and certain nebular structures. This emission band gives comets their typical <strong>greenish glow<\/strong>, and is visible only with highly selective optical filters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With a bandwidth of only 15 nanometers, this filter blocks virtually all unwanted light pollution and provides extremely high contrast between the object and the sky background. This makes the C2 Swan-Band an essential tool for <strong>comet photography, spectroscopy and scientific applications<\/strong> where detail and accuracy are crucial.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 2\u2033 version is ideal for use with larger sensors or wide-beam optical systems. Thanks to <strong>Baader's exclusive hard coating<\/strong> the filter is resistant to moisture, scratches and oxidation. The stable optical coating prevents center wavelength shift even in fast optics (up to f\/2).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application:<\/strong><br>The Baader C2 Swan-Band 15nm 2\u2033 is ideal for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Astrophotography of comets with clear C2 emission.<\/li>\n\n\n\n<li>Deep-sky objects with faint Swan lines.<\/li>\n\n\n\n<li>Use with fast optics (up to f\/2) and large image sensors.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Perfect for mounting in 2\u2033 filter wheels, adapters or off-axis systems. This filter offers the highest image quality for those who want to precisely capture the subtle green of C2 emission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specifications:<\/strong><br>Filter type: Narrowband filter (C2 Swan-Band)<br>Central wavelength: 514 nm<br>Bandwidth (FWHM): 15 nm<br>Transmission:&gt;90%<br>Barrel size: 2\u2033<br>Optically flat glass with hard coating<br>Parfocal: Yes<br>Housing: Aluminum, black anodized<br>Suitable for fast optics: up to f\/2<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=\"52\" data-end=\"288\">Baader Filters C2 Swan-Band 15nm 2\u2033 comes with protective filter box - professional narrowband filter for capturing C2 Swan emission lines in comets and nebulae with maximum light transmission.<\/p>\n<p data-start=\"290\" data-end=\"685\">\u00a0<\/p>\n<p data-start=\"291\" data-end=\"608\">\u00a0<\/p>","protected":false},"featured_media":30219,"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-30217","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":30208,"url":"https:\/\/www.telescoop.nl\/en\/baader-c2-swan-band-filter-15nm-1-25-inch\/","url_meta":{"origin":30217,"position":0},"title":"Baader C2 Swan-Band Filter 15nm 1.25 inches","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters C2 Swan-Band 15nm 1,25\" wordt geleverd met beschermende filterdoos \u2013 gespecialiseerd smalbandfilter voor het vastleggen van koolstofnevels (C2 Swan-emissie) bij komeet- en deep-skyfotografie. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters C2 Swan-Band 15nm 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-C2-Swan-Band-15nm-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":34143,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-40mm-2-swan-oculair\/","url_meta":{"origin":30217,"position":1},"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":"","width":0,"height":0},"classes":[]},{"id":34147,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series-2\/","url_meta":{"origin":30217,"position":2},"title":"William Optics 400mm Losmandy Swan Series","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 400mm comes with Losmandy-compatible dovetail of 400mm length in gold aluminum - ideal for heavy optical systems and accessories. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":34133,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-400mm-losmandy-swan-series\/","url_meta":{"origin":30217,"position":3},"title":"William Optics 400mm Losmandy Swan Series","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 400mm comes as a 400mm long Losmandy-style Swan Series dovetail, made of red aluminum for stable mounting of telescopes and accessories. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":90688,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-2-inch-uhc-filter\/","url_meta":{"origin":30217,"position":4},"title":"Sky-Watcher 2\u2033 UHC Filter","author":"","date":"30-11-2025","format":false,"excerpt":"Skywatcher UHC 2 wordt geleverd met 2\" UHC-nevelfilter in aluminium vatting \u2013 ideaal om lichtvervuiling te onderdrukken en zwakke nevels met hoger contrast waar te nemen, visueel \u00e9n fotografisch. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":30254,"url":"https:\/\/www.telescoop.nl\/en\/baader-narrowband-oiii-filter-cmos-f-2-highspeed-50-4mm\/","url_meta":{"origin":30217,"position":5},"title":"Baader Narrowband OIII Filter CMOS f\/2 Highspeed 50.4mm","author":"","date":"06-10-2025","format":false,"excerpt":"Baader Filters OIII CMOS f\/2 Highspeed 50.4mm comes with protective filter box - precision filter for large CMOS sensors with high-speed optics. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Baader Filters OIII CMOS f\/2 Highspeed 50.4mm","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/10\/Baader-Filters-OIII-CMOS-f-2-Highspeed-50-4mm.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/30217","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=30217"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/30219"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=30217"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=30217"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=30217"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=30217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}