Baader Filters OIII CMOS f/2 Ultra-Highspeed 31mm
5989.22 ₴
Tax included
The OIII filter exclusively permits light with a wavelength of 501 nanometers, corresponding to the spectral lines of doubly ionized oxygen. These lines are emitted by planetary and some emission nebulae, allowing these celestial objects to remain visible while other wavelengths are filtered out.