Baader Filters OIII CMOS f/2 Ultra-Highspeed 36mm (70937)
293.21 $
Tax included
OIII filters are designed to allow light with a wavelength of 501 nanometers to pass through. This corresponds to the spectral lines emitted by doubly ionized oxygen. These lines are characteristic of planetary nebulae and certain emission nebulae. By blocking out other wavelengths, the filter enhances contrast, making faint nebulae visible even in light-polluted skies.