Reduces bright glare reflected off the Moon and boosts contrast and resolution of lunar surface features. Enhances the contrast of the moon and planets in photographic images A specialty Moon filter especially useful for increasing contrast during waning and waxing crescent phases. Provides a brighter view than the 13 percent Moon filter by blocking less light - ideal for use with smaller telescopes. Metal filter cell threads directly into 1.25- inch telescope eyepiece barrels.