{"product_id":"antlia-s1-dual-band-5nm-h-alpha-oiii-filter-for-seestar-s50-pro","title":"Antlia S1 Dual-Band 5nm H-Alpha\/OIII Filter for Seestar S50 Pro","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned specifically for the Seestar S50 Pro\u003c\/li\u003e\n\u003cli\u003eDual-band filter passes H-alpha and OIII emission lines\u003c\/li\u003e\n\u003cli\u003eNarrow 5nm bandpass for high-contrast imaging\u003c\/li\u003e\n\u003cli\u003eFront-mounted design with standard 2\" M48x0.75 threads\u003c\/li\u003e\n\u003cli\u003eIncludes the S50 Pro hood and mounting interface\/adapter\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\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAntlia S1 Dual-Band 5nm H-Alpha\/OIII Filter for Seestar S50 Pro\u003c\/h2\u003e\n\u003cp\u003eThe Antlia S1 Dual-Band 5nm H-Alpha\/OIII Filter is engineered specifically to enhance the deep-sky imaging capabilities of the Seestar S50 Pro \u003ca href=\"\/en-us\/collections\/smart-telescopes\"\u003esmart telescope\u003c\/a\u003e. This dual-channel filter uses a narrow 5nm bandpass to isolate two emission lines found in many nebulae, H-alpha and OIII, increasing contrast from light-polluted skies. Its integrated front-mount design uses a standard M48x0.75 thread, allowing it to screw directly onto the front of the S50 Pro.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Dedicated Dual-Band Filter for the Seestar S50 Pro\u003c\/h3\u003e\n\u003cp\u003eThis filter is not a general-purpose accessory; it is a dedicated solution for Seestar S50 Pro owners looking to capture high-contrast images of emission nebulae. By passing only narrow bands around these two lines, it reduces background light from light pollution so that nebulae stand out against a darker sky in your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual 5nm Passbands: H-Alpha and OIII\u003c\/h3\u003e\n\u003cp\u003eThe Antlia S1 simultaneously captures light from two spectral lines. It passes the deep red of Hydrogen-alpha (H-alpha) and the blue-green of doubly ionized Oxygen (OIII), two strong emission lines of many emission nebulae, including star-forming regions and planetary nebulae. The 5nm bandwidth rejects most light outside these two lines, which darkens the sky background around the nebula.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFront-Mounted with an M48x0.75 Thread\u003c\/h3\u003e\n\u003cp\u003eThe Antlia S1 is front-mounted and uses a standard 2\" M48x0.75 thread. The filter screws directly onto the front of the Seestar S50 Pro, and Antlia includes the required mounting interface\/adapter. The package also contains a hood for the S50 Pro, so the parts needed to fit the filter are in the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eInstallation and Solar Safety Warning\u003c\/h3\u003e\n\u003cp\u003eAntlia includes the mounting interface\/adapter needed to fit the S1 to the front of the Seestar S50 Pro, along with an S50 Pro hood. Antlia has not published step-by-step fitting instructions yet; contact us if you need help. The S1 is a \u003ca href=\"\/en-us\/collections\/narrowband-filters\"\u003enarrowband filter\u003c\/a\u003e for night-sky imaging only.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Safety Warning:\u003c\/strong\u003e This filter is NOT a \u003ca href=\"\/en-us\/collections\/solar-filters\"\u003esolar filter\u003c\/a\u003e. Never point the Seestar S50 Pro at the Sun with the S1 in place. Doing so can damage the telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Antlia S1 filter for the Seestar S50 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Antlia S1 is a dual-band 5nm filter designed to improve images of emission nebulae taken with the Seestar S50 Pro. It isolates the H-alpha and OIII wavelengths, which increases contrast and reduces the effects of light pollution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Antlia S1 filter attach to the Seestar S50 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter is front-mounted. It screws directly onto the front of the Seestar S50 Pro with a standard 2\" M48x0.75 thread. The S50 Pro hood and the required mounting interface\/adapter are included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy anything else to use the Antlia S1 filter with my Seestar S50 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Antlia S1 comes with the required mounting interface\/adapter and an S50 Pro hood.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat types of celestial objects is the Antlia S1 filter best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is specifically for imaging \u003cstrong\u003eemission nebulae\u003c\/strong\u003e that are rich in Hydrogen-alpha and Oxygen-III light. This includes objects like the Orion Nebula (M42), the Lagoon Nebula (M8), and many planetary nebulae. It is not intended for broadband targets like galaxies or star clusters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 5nm bandwidth on the Antlia S1 affect my Seestar images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 5nm bandwidth blocks most light outside the H-alpha and OIII lines, including much of the light from city light pollution. This gives a darker background, so the nebula stands out with more contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Antlia S1 filter for viewing the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e The Antlia S1 is a night-sky filter, not a solar filter. Never point the Seestar S50 Pro at the Sun with the S1 in place; use a dedicated solar filter for solar imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eDual-band (dual-channel) front-mounted filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePassbands\u003c\/td\u003e\n\u003ctd\u003eH-alpha and OIII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesigned For\u003c\/td\u003e\n\u003ctd\u003eSeestar S50 Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFront-mounted, screws directly onto the front of the Seestar S50 Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003eStandard 2\" M48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Accessories\u003c\/td\u003e\n\u003ctd\u003eSeestar S50 Pro hood, mounting interface\/adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eSeestar S50 Pro\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAntlia S1 Dual-Band 5nm H-Alpha\/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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSeestar S50 Pro hood\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting interface\/adapter\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\u003cli\u003e\nContact us for warranty details.\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":67888630366493,"sku":"ANT-S1-S50PRO","price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-s1-filter-seestar-s50-pro-1.jpg?v=1793205653","url":"https:\/\/davidastro.com\/en-us\/products\/antlia-s1-dual-band-5nm-h-alpha-oiii-filter-for-seestar-s50-pro","provider":"David Astro","version":"1.0","type":"link"}