ED glass, or Extra-low Dispersion glass, is a specialized type of optical glass designed to minimize chromatic aberration, which is the distortion of colors in images. This glass is often used in high-quality lenses for cameras, telescopes, and binoculars, providing clearer and sharper images by reducing color fringing. The unique properties of ED glass are achieved through its specific chemical composition, which lowers the dispersion of light. This makes it particularly valuable in the fields of photography and astronomy, where precise color representation is crucial for capturing and observing details in images.