Optolong Moon and Skyglow Filter 2 inch 20410 When you are outside doing

When you are outside doing astronomy

scratch-resistant even in extreme conditions

innovative eyepiece design (8 elements in 5 groups) features oversized eye lens elements for comfortable viewing and provides a highly corrected image

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Optolong Moon and Skyglow Filter 2 inch 20410 When you are outside doingOptolong Moon and Skyglow Filter 2 inch Optolong 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 Ideally it is quite versatile filter for visual observation and astrophotography