Learning the lingo
Lens fault common on ultra-wide lenses that bows straight lines outwards at the edges.
Lens fault in which wavelengths of light are refracted by different amounts, or brought to focus at different distances.
Lens fault common on long telephoto lenses that causes the image to appear to bow inwards at the edges.
Apochromat. A type of lens, made by Sigma and others, that’s designed to correct chromatic aberration.
Extra-low dispersion. A range of Nikon lenses designed to correct chromatic aberration.
Ultra-low Dispersion. Element found in some Canon L-Series lenses that’s designed to correct chromatic aberration.