1.25 inch deep-sky light pollution reduction contrast boosting filter for CCD camera use
This CLS Deep-Sky UHC filter is specifically designed for CCD camera use for improving visual contrast of nebulae, galaxies and star clusters with astronomical instruments of any size.
The filter essentially blocks the light in the spectral lines of mercury and sodium-vapor lamps while letting the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that "well dark adapted eyes" can see, will pass through this excellent allround use filter.
The Optolong CLS CCD Deep-Sky filter is suitable for use with telescopes of all apertures.
Glass thickness: 2mm
Seated Cell height: 5.1mm