Chromatic aberration, also known as false color or color fringing, is a common trait among optical telescopes, particularly in refractors. It occurs when one or more colors of light focus at different locations, causing bright objects to appear to have colored halos around them, including stars, planets, and the moon. Though it can be eliminated in higher-end refractors, chromatic aberration is commonly found in entry-level and some intermediate refractor telescopes.