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and star clusters
it is suitable for daily use
ensuring long-lasting performance
and scanning star fields or open clusters
Wired microphone headset with one-key recording function
Optolong CLS Filters Guest Pager System and star clustersThe 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
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