From Astronomik website:
- Blocks the light of the spectral lines of mercury and sodium-vapor lamps (streetlights) and lets the largest part of the visible light and H-alpha emissions pass.
- The CLS filter is suitable for use with telescopes of all aperture sizes
- Glass thickness: 1mm
- Completely resistant against high humidity, scratches and aging effects
- Diffraction limited, the filter will not reduce the optical performance of your telescope
Selling for $60 (usually $125 at Bintel, currently out of stock)
Last edited by dewo; 11-10-2022 at 05:16 PM.
Reason: sold
