1.25 inch Telescope Eyepiece: Threaded for standard 1.25 inch astronomy filters telescopes and telescope accessories highly compatible
Fully-Multicoated Achromatic Design: Featuring a 4-element Plossl optical design with an approximate 50-degree AFOV, perfect for broad field lunar observations; medium sized star clusters; provide a wide range of cloudy nebulas and deep sky targets
Comfortable Fold-Down Rubber Eyeguard: Equipped with a fold-down rubber eyeguard, it provides comfort during extended observation sessions
Neutral density filters are excellent filters to reduce the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope
These three ND moon filters are useful for splitting binary systems; comfortably observing the moon; or stacking with other planetary filters