{"product_id":"antlia-alp-t-dual-band-ha-oiii-3nm-filter","title":"Antlia ALP-T Dual Band Ha\u0026OIII 3nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n    \u003cli\u003e\n        Precise Narrowband Filtering for Exceptional Contrast\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Enhanced Transmission for Superior Signal-to-Noise Ratio\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Anti-Reflection Coating to Reduce Halo Effect\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Optimized for Fast Optics up to f\/2\n    \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!--\u003cli\u003eDownloads\u003c\/li\u003e--\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 Ha\u0026amp;OIII 3nm - Overview\u003c\/h2\u003e\n        \n                    \u003cp\u003e\n                        The 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.                    \n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\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                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Superior imaging in challenging light conditions.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 2 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Suitable for capturing traditional RGB images or creating artistic false-color palettes.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 3 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eEasy Integration\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Compatible with optics slower than f\/4, with high-speed versions available for faster setups.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!--\n            \u003cdiv class=\"DAV-bg-light DAV-section-center\"\u003e\n                \u003ch3\u003eWhy Choose the Antlia ALP-T Filter Set?\u003c\/h3\u003e\n                \u003cp\u003eCombining these filters allows astrophotographers to capture the four key emission lines (H-alpha, OIII, SII, Hβ) in unparalleled detail. The advanced multi-coating technology suppresses light pollution, moonlight, and airglow while delivering outstanding contrast and clarity. Whether you’re imaging from urban or rural locations, this filter set ensures breathtaking astrophotography results.\u003c\/p\u003e\n                \u003cdiv class=\"DAV-grid-img\"\u003e\n                    \u003cimg 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\" alt=\"Highlight 1\"\u003e\n                    \u003cimg 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\" alt=\"Highlight 2\"\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n            --\u003e\n            \n            \u003c!-- image text --\u003e\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003c!-- Image Section --\u003e\n                \u003cdiv class=\"DAV-section-img\"\u003e\n                    \u003cimg 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\" alt=\"Ha\u0026amp;Oiii\"\u003e\n                \u003c\/div\u003e\n\n                \u003c!-- Text Section --\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eHa\u0026amp;OIII 3nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        This dual narrowband filter isolates the H-alpha (656.3nm) and OIII (500.7nm) emission lines, optimized for use with color cameras. With a Full Width Half Maximum (FWHM) bandwidth of 3nm, it effectively blocks unwanted wavelengths, including light pollution, moonlight, and airglow. The result is an enhanced signal-to-noise ratio and strikingly detailed nebula images.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\n\u003cb\u003ePrecise Transmission:\u003c\/b\u003e Passes H-alpha and OIII lines exclusively for improved contrast in celestial images.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eExceptional Filtering:\u003c\/b\u003e Blocks optical density (OD) 4.5 on stray wavelengths, suppressing light pollution and enhancing nebula visibility.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eIdeal for OSC Cameras:\u003c\/b\u003e Designed for color cameras, with applications in luminance filtering for monochrome cameras.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eFlat-Top Bandpass:\u003c\/b\u003e Reduces spectrum shifts for consistent imaging performance, even under varying conditions.\u003c\/li\u003e\n                    \u003c\/ul\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!--\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eSII\u0026Hβ 3.5nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        The SII\u0026Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha\u0026OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\u003cb\u003eDual Narrowband Capture:\u003c\/b\u003e Captures SII and H-beta lines simultaneously for rich spectral imaging.\u003c\/li\u003e\n                        \u003cli\u003e\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\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\n                    \u003cimg 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\" alt=\"Sii\u0026Hb\"\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n            --\u003e\n\n        \u003c\/div\u003e\n    \u003c\/li\u003e\n\n    \u003cli\u003e\n        \u003ch2\u003eHa\u0026amp;OIII 3nm 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\u003e3nm\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% (H-alpha), 82% (OIII)\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\u003eFilter Thickness\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e2mm\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 filter cell with M48*0.75 thread to reduce vignetting\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003c!-- Add more rows as needed --\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n        \u003c!--\n        \u003ch2\u003eSII\u0026Hβ 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        --\u003e\n    \u003c\/li\u003e\n    \n    \u003cli\u003e\n        \u003cul class=\"DAV-grid\"\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg 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\" alt=\"HaOIII\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eHa\u0026amp;OIII 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!--\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg 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\" alt=\"SiiHb\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eSii\u0026Hb Filter\u003c\/p\u003e\n                    \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/li\u003e\n            --\u003e\n        \u003c\/ul\u003e          \n    \u003c\/li\u003e\n    \u003c!--\n    \u003cli\u003e\n        \u003cul class=\"DAV-grid\"\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003ca href=\"\" target=\"_blank\"\u003e\n                    \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\"\/\u003e\u003c\/svg\u003e\n                    \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c\/a\u003e\n            \u003c\/li\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003ca href=\"\" target=\"_blank\"\u003e\n                    \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\/\u003e\u003c\/svg\u003e                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c\/a\u003e\n            \u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/li\u003e\n    --\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"Default Title","offer_id":49428837531933,"sku":"ANT-ALP-T-3NM-HAOIII","price":390.0,"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-ha-oiii-3nm-filter","provider":"David Astro","version":"1.0","type":"link"}