Astronomik CLS CCD Clip Filter
The Astronomik CLS CCD filter is ideal for astrophotography under light-polluted skies. It suppresses the distracting sky background, thereby enhancing the contrast between deep-sky objects and the background.
The Astronomik CLS CCD filter is designed for use with astronomical cameras (CMOS and CCD) and modified system and DSLR cameras and features an integrated infrared (IR) block filter.
The Astronomik CLS CCD filter largely suppresses artificial light pollution and enables high-contrast, deep images under light-polluted skies. The filter is optimized to block almost all unwanted light from high- and low-pressure sodium (Na)- and mercury (Hg)-vapor lamps, the emission maxima of LED lighting, as well as all lines of natural airglow. At the same time, it allows the maximum amount of light from the astronomical objects to pass through and enables a nearly true-color reproduction.
The Astronomik CLS CCD filter is suitable for telescopes or lenses with focal ratios from 1:1.8 to 1:15.
Other uses
• For color images from emission line objects, the Astronomik CLS CCD filter is an excellent choice for the luminance channel under light-polluted skies.
• The 1.25″- and 2″-cell models can be used for visual observations from light-polluted areas as well.
Alternatives
For cameras with an built-in IR block filter or for visual observation, the Astronomik CLS filter is a more budget-friendly option.
Suitability of the Astronomik CLS CCD filters
• CMOS and CCD photography: Very good blocking of light-pollution
• DSLR photography (original): Good, color balance is shifted but contrast is enhanced
• DSLR photography (astro-modified): Very good, color balance is close to perfect
• DSLR photography (MC-modified): Very good, color balance is close to perfect
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