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Bright globular clusters remind me of sugar spilled on a black table cloth
25" and 2" focusers
just as you would with no filter in place
and VOX for hands-free operation
Optolong CLS Filters Guest Pager System Bright globular clusters remind meThe Optolong CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow). Together with the highly
