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The CLS-CCD filter filter lets you eliminate some of the most important lines of light pollution and let pass all the most important wavelengths emitted by weak objects such as the H-alpha, H-beta, OIII and SII lines. Compared to the UHC filters, it doesn't let pass the infrared radiation then, for photographic use, it doesn't require an additional IR-cut filter.
This CLS-CCD filter offers a high transmissivity (greater than 95% in almost all of the visible spectrum). All PrimaLuceLab-filters are carefully tested to verify the quality of the substrate and antireflection coating: in this way we assure our customers that the filters do not add problems to your pictures and that there are no annoying reflections (effects that may occur in economic models ).
How to use the filters: The PrimaLuceLab-filters are always available in two diameters: 31.8mm and 50.8mm. These standards are commonly used by telescopes and their accessories. For example, depending on their function, they can be used with a CCD ora A DSLR camera (using appropriate photo adapters), but also screwed to optical accessories such as eyepieces or diagonals.
