A type of compound lens that uses either three or more elements, or special glasses, like fluorite or ED glass, to bring at least three colors to a common focus. In practice, errors are minimized across all wavelengths in order to achieve a very high degree of color correction. Most camera lenses are apochromatic. Compare this with an achromat.

A special construction which reduces or corrects erroneous colours.

High-quality refracting (lens-based) telescope with expensive and exotic glass element(s). False color (chromatic aberration) is reduced to imperceptible levels. See also achromat, refractor, chromatic aberration. Expensive.

A lens made of three pieces of glass (or other materials) with differing dispersions, chosen so as to reduce chromatic aberration to an even greater degree than in an achromat.

a lens or lens system which has even better correction of chromatic aberration, combined with improved correction of spherical aberration

a lens or lens system which minimizes both chromatic and spherical aberrations

a lens Whose properties make many friends

A refractor or lens element that is optimized and uses special glasses to eliminate chromatic aberration.

A lens designed to be colour-corrected for three primary spectral colours.

lens corrected for chromatic aberration in all three primary colors.

A premium objective lens that displays no prismatic color.

A complex objective lens system that produces brilliant images and is corrected to the highest degree for color and spherical aberration.

An apochromat, or apochromatic lens (apo), is a photographic or other lens that has better color correction than the much more common achromat lenses. Chromatic aberration is the phenomenon of different colors focusing at different distances from a lens. In photography, it produces soft overall images, and color fringing at high-contrast edges, like an edge between black and white.