Baader Filters OIII CMOS f/2 Ultra-Highspeed 65x65mm (70941)
690.21 $
Tax included
OIII filters are designed to allow only light with a wavelength of 501 nanometers to pass through. This corresponds to the spectral lines of doubly ionized oxygen, which are emitted by planetary nebulae and some emission nebulae. By blocking out other wavelengths, these filters enhance contrast, making faint nebulae visible while suppressing unwanted light.