Antlia S1 Dual-Band 5nm H-Alpha/OIII Filter for Seestar S50 Pro

Designed specifically for the Seestar S50 Pro Dual-band filter passes H-alpha and OIII emission lines Narrow 5nm bandpass for high-contrast imaging Front-mounted design with standard 2" M48x0.75 threads Includes the S50 Pro hood and mounting interface/adapter Description FAQ Specifications In the Box Warranty Antlia S1 Dual-Band 5nm H-Alpha/OIII Filter for Seestar S50 Pro The Antlia S1 Dual-Band 5nm H-Alpha/OIII Filter is engineered specifically to enhance the deep-sky imaging capabilities of the Seestar S50 Pro smart telescope. 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. A Dedicated Dual-Band Filter for the Seestar S50 Pro This 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. Dual 5nm Passbands: H-Alpha and OIII The 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. Front-Mounted with an M48x0.75 Thread The 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. Installation and Solar Safety Warning Antlia 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 narrowband filter for night-sky imaging only. Solar Safety Warning: This filter is NOT a solar filter. Never point the Seestar S50 Pro at the Sun with the S1 in place. Doing so can damage the telescope. What is the purpose of the Antlia S1 filter for the Seestar S50 Pro? The 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. How does the Antlia S1 filter attach to the Seestar S50 Pro? The 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. Do I need to buy anything else to use the Antlia S1 filter with my Seestar S50 Pro? No. The Antlia S1 comes with the required mounting interface/adapter and an S50 Pro hood. What types of celestial objects is the Antlia S1 filter best for? This filter is specifically for imaging emission nebulae 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. How will the 5nm bandwidth on the Antlia S1 affect my Seestar images? The 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. Can I use the Antlia S1 filter for viewing the Sun? No. 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. Filter Type Dual-band (dual-channel) front-mounted filter Passbands H-alpha and OIII Bandwidth 5nm Designed For Seestar S50 Pro Mounting Front-mounted, screws directly onto the front of the Seestar S50 Pro Thread Standard 2" M48x0.75 Included Accessories Seestar S50 Pro hood, mounting interface/adapter Antlia S1 Dual-Band 5nm H-Alpha/OIII Filter × 1 Seestar S50 Pro hood × 1 Mounting interface/adapter × 1 Contact us for warranty details.