ANTLIA OIII 3nm FAST ULTRA NARROWBAND FILTER Size:2" Double layer for a better

Double layer for a better insulation

Includes one BA2904020 molded plastic dust cap

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

Prime focus focal ratio

Even bright stars won’t saturate under long exposure

ANTLIA OIII 3nm FAST ULTRA NARROWBAND FILTER Size:2" Double layer for a betterThe 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.