Binoculars and optics made of ED glass ED glass in binoculars ED glass effectively compensates for chromatic aberration (chromatic aberration = different coloured parts of a beam of light are refracted to different degrees - clearly visible as a colour fringe along edges) and thus contributes to images with superior contrast and outstanding resolution. The reward is exceptionally detailed, true-colour and vivid images. Under ED glass (Extra-Low Dispersion [...]