Astro Essentials CLS Filter 1.25" / 2"

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Astro Essentials CLS Filter 1.25"

£38.00 £29.00

About this product

The Astro Essentials CLS Filter is a broad band light pollution filter available in 1.25" and 2" Sizes.

The CLS (City Light Suppression) Light Pollution Filter is designed to improve the visibility of various deep-sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting including mercury vapour lamps, both high & low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for astrophotography.

IMPORTANT: These Filters are NOT designed for observing or photographing the Sun. DO NOT use Astro Essentials filters to observe or photograph the Sun. If you do it will result in permanent eye damage! 

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