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
ND filters retain true color balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum
Seamless Magnification Control: A simple twist of the zoom housing adjusts focal length from 8mm-24mm; Ideal for planetary clusters, lunar details, and deep-sky nebulae observation
Extended Eye Relief for Eyeglass Users: 15 to 18 millimeter eye relief; The foldable rubber eye cups also eliminate any stray light; Whether you wear eyeglasses or not; you are guaranteed a good field of view at a comfortable viewing distance