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and scanning star fields or open clusters
the halo of OIII 3nm filter was optimized by improving the coating technology
just as you would with no filter in place
and VOX for hands-free operation
Optolong CLS Filters Guest Pager System and scanning star fields orThe 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
US$ 162.50
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