In
digital photography, achromatic is the term used to describe a camera
lens
system that is corrected for
chromatic aberration, a defect in some optical
lens systems that adds false color to images. Chromatic aberration is corrected
by the achromatic lens as it brings two colors to the same focus.
See
chromatic aberration.
See also "The
Digital Camera Picture" in the Quick Reference section of Webopedia.