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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 our UHC filters, it doesn't let pass the infrared radiation then, for photographic use, it doesn't require an additional IR-cut filter.
Delete the most important lines of light pollution
It lets pass the most important wavelengths emitted by deep-sky objects
Delete the infrared radiation and it eliminate the need of an additional IR-Cut filter for imaging
Transmittance higher than 95%
Anti-reflective multi-layer coating to not generate ghost images
Quality substrate not to introduce aberrations in the images
How to use the filters:
Our filters are available in 2 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. Warning: 31.8mm filters do not work with 50.8mm diameter accessories and vice versa (unless there are special adapters). When you choose the version of your filter, be careful to choose the diameter compatible with your equipment.
Che dire...OPTOLONG...il mio primo filtro....ora ne comprendo l' essenzialità.