A general use filter for improving night sky viewing clarity, the Moon Sky Glow Filter from MrStarGuy is intended for use with smaller telescopes featuring a 2"-diameter eyepiece. This all-around filter removes key wavelengths known to cause visual light scatter in order to render nebulae, galaxies, and star clusters with greater contrast and brightness. Ideal for use in light-polluted areas, this filter also helps to improve sharpness for clearer viewing of deep sky objects.