Baader Filters OIII CMOS f/2 Highspeed 50.4mm
110.36 £
Tax included
OIII filters exclusively permit light with a wavelength of 501 nanometers to pass through. This wavelength corresponds to the spectrum lines of doubly ionized oxygen, emitted by planetary nebulae and some emission nebulae. By selectively allowing only this specific light to pass, these filters enhance contrast, making faint nebulae visible for the first time while blocking out other wavelengths.
