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240 minutes of Ha
Wired microphone headset with one-key recording function
it is suitable for daily use
and scanning star fields or open clusters
the halo of OIII 3nm filter was optimized by improving the coating technology
Optolong CLS Filters Guest Pager System 240 minutes of HaThe 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
