The CLS (City Light Suppression) broadband filter was designed to improve the visibility of various deep-sky objects.

This is achieved in part by reducing the transmission of light pollution wavelengths, particularly those resulting from artificial lighting including mercury vapor lamps. But also by blocking the emissions of sodium vapor lamps and the harmful sky glow effect. Together with the highly transparent transmission lines OIII (496 nm and 500 nm), H-beta (486 nm), NII (654 nm and 658 nm), H-alpha (656 nm) and SII (672 nm) this filter is perfect for improving contrast and details for visual and photographic uses, in areas with strong light pollution.

• The CLS-CCD filter differs from the CLS by an infrared wavelength of 700-1100 nm
• Suitable for CCD and DSLR color cameras modified for astrophotography
• Great for most emission nebulae, planetary nebulae and supernova remnants
• Noticeable increase in contrast and visibility of the faintest and peripheral details
• Light pollution filters do not eliminate its effects, nor do they increase the brightness of objects. In many cases it increases the contrast between the nebula and the night sky, without increasing the brightness of the nebula.

Attention, this filter must never be used alone for observing the Sun!

This item is not available for customers in Germany.