OIII 12nm CCD MaxFR Clip-Filter EOS R XL

The Astronomik OIII 12nm CCD MaxFR Clip-Filter EOS R XL is a premium narrowband emission line filter designed for deep-sky astrophotography with Canon full-frame mirrorless cameras. Featuring the advanced MaxFR coating optimized for fast optical systems (f/1.7 to f/8), this filter excels at imaging oxygen-emitting nebulae including planetary nebulae, supernova remnants, and star-forming regions. With typical transmission of 95% at the OIII line (501nm) and complete blocking of light pollution from sodium and mercury lamps across the UV to infrared spectrum, it delivers exceptional contrast and detail capture even from light-polluted locations. Compatible with H-alpha and SII filters for Hubble Space Telescope-style false-color HSO imaging.