ANTLIA OIII 3nm FAST ULTRA NARROWBAND FILTER Size:2" Includes one BA2904020 molded plastic

Includes one BA2904020 molded plastic dust cap

Maximum transmission of the main nebula emission lines at OIII (496nm and 500nm)

offering better resolution capacity due to its greater diameter while maintaining a lower sensitivity to wind due to the perforated surface of the antenna

Even bright stars won’t saturate under long exposure

with a central RMS radius of only 3 microns

ANTLIA OIII 3nm FAST ULTRA NARROWBAND FILTER Size:2" Includes one BA2904020 molded plasticThe Antlia OIII 3nm FAST ultra narrowband filter boosts the contrast of emission nebulae and supernova remnants for professional results, even under a bright sky affected by light pollution. The FAST series of filters are designed for telescopes with a focal ratio between f 2. 6 f 3. 6. Blueshift data indicates that at a focal ratio of f 2. 6, the angle of incidence of the light cone is 10 and its bandwidth shifts 2. 2nm to shorter wavelengths.