Lens glossary
APS-C
A sensor format that’s smaller than full frame, measuring 23.5x15.6mm. Cameras with these sensors can accept ‘digital only’ lenses or full-frame compatible optics.
ASPHERICAL ELEMENTS
Glass elements in the lens system that do not form part of a sphere. These are designed to reduce the effects of spherical aberration for superior edge performance.
BARREL DISTORTION
A bending of lines within an image, which makes the lines appear to bulge at the centre of
