Filters

• Enhance imaging of nebulae with your 8” Rowe-Ackermann Schmidt Astrograph (RASA) by blocking light pollution, improving image contrast, and darkening the sky background.
• This filter transmits only the key Hα-Hβ-OIII wavelengths from emission nebulae, providing high contrast that makes them “pop.”
• This filter selectively blocks wavelengths of light from sources of light polluted skies and natural sky glow.
• Unlike similar filters with narrower bandpasses, this filter was engineered specifically to work with RASA’s fast F/2 optics.
• Fits into the 8” RASA’s integrated filter mount, maintaining peak optical performance.
• Optically flat surfaces free of defects, constructed of Schott glass with anti-reflection coatings.

ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm, which is designed for nebula observation.

Narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of nebulae, even in areas with strong light pollution.

Attach the Sky-Watcher Solar Filter for Maksutov Telescopes securely over the front of your telescope to conduct safe solar viewing. If you are looking at Sun spots, or just wanting to get a closer look at our closest star, this filter will reflect the harmful rays and reduce the intensity of the sunlight making it safe to view through your telescope.

• Take beautiful images of deep-sky objects from light-polluted suburban locations with the Rowe-Ackermann Schmidt Astrograph 11 (RASA 11) using this light pollution suppression filter
• Custom designed to replace the RASA’s optical window, so you still get optimum optical performance even with the addition of the filter
• Selectively blocks unwanted light pollution while providing over 90% transmission at critical wavelengths
• Maintains a more neutral color balance than other light pollution imaging filters, perfect for imaging colorful nebulae and galaxies
• Every filter is individually tested for light transmission. A graph of test results for your specific filter is included for your reference