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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 and Performance Ideally it is quite versatile filter for visual observation and astrophotography on planetary nebula. Main Feature: Precise CNC Machining Black Anodized Finish. Sand Blasting Process Extinction Treatment to Prevent Reflection Laser Engraving No Fading Package Plastic PP Case Silver Cardboard Box. Imported High Pressure EVA Case Lining High Density Sponge Carton Lining Size Standard 2"  Parcel: 2" OPTOLONG Moon & Skyglow Filter 

Filed under: Eyepieces & Accessories