COLOUR FRINGING
Two flavours are served up by fast primes
Our lab scores reveal the extent of lateral chromatic aberration, which shows up as coloured lines around high-contrast edges towards the corners of the frame. It can be visible, for example, around dark tree branches and leaves against a bright sky. Longitudinal chromatic aberration, also known as ‘axial CA’ or bokeh fringing, occurs mostly at very wide apertures, and can be seen around the borders between in-focus areas and defocused surroundings.