{"product_id":"antlia-alp-t-dual-band-sii-hb-3-5nm","title":"Antlia ALP-T Dual Band SII\u0026Hβ 3.5nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003ePrecise Narrowband Filtering for Exceptional Contrast\u003c\/li\u003e\n\u003cli\u003eEnhanced Transmission for Superior Signal-to-Noise Ratio\u003c\/li\u003e\n\u003cli\u003eAnti-Reflection Coating to Reduce Halo Effect\u003c\/li\u003e\n\u003cli\u003eOptimized for Fast Optics up to f\/2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003c!-- Title image text --\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003c!-- Main Image --\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAntlia ALP-T Dual Band SII\u0026amp;Hβ 3.5nm - Overview\u003c\/h2\u003e\n\u003cp\u003eThe Antlia ALP-T Dual Band Filter Set is a high-performance toolset designed for astrophotographers who demand precision, contrast, and exceptional image quality. This set includes the Ha\u0026amp;OIII 3nm Filter and the SII\u0026amp;Hβ 3.5nm Filter, providing unmatched narrowband imaging capability for capturing deep-sky objects with remarkable clarity and detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Features Grid --\u003e\n\u003cdiv class=\"DAV-feature-grid\"\u003e\n\u003c!-- Feature Box 1 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n\u003cp\u003eSuperior imaging in challenging light conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 2 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n\u003cp\u003eSuitable for capturing traditional RGB images or creating artistic false-color palettes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 3 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eEasy Integration\u003c\/h3\u003e\n\u003cp\u003eCompatible with optics slower than f\/4, with high-speed versions available for faster setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h3\u003e\n\u003cp\u003eThe SII\u0026amp;Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha\u0026amp;OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual Narrowband Capture:\u003c\/b\u003e Captures SII and H-beta lines simultaneously for rich spectral imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnhanced Imaging Contrast:\u003c\/b\u003e Blocks optical density (OD) 4.5 on unwanted wavelengths, optimizing contrast even in light-polluted conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCreative Color Palettes:\u003c\/b\u003e Enables various combinations like H-O-Hβ or S-H-O for unique astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cimg alt=\"Sii\u0026amp;Hb\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h2\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.5mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e90% (SII), 85% (Hβ)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eRing Design\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUltra-thin and black anodized to minimize reflections\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"HaOIII\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSII\u0026amp;Hβ Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":49428843594013,"sku":"ANT-ALP-T-3NM-SIIHB","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577","url":"https:\/\/davidastro.com\/fr-us\/products\/antlia-alp-t-dual-band-sii-hb-3-5nm","provider":"David Astro","version":"1.0","type":"link"}