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About Moon&Skyglow Filter
Moon&Skyglow Filter Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters. Main Use and Performance Ideally it is quite versatile filter for visual observation and astrophotography on planetary nebula. WARNING: The filters of Optolong are not designed for sun observation.
