Moustache Distortion
A complex distortion combining barrel and pincushion in the same frame, so lines curve one way near the centre and back the other near the edge.
Measured in
%
In depth
Also called wavy distortion, it arises in aggressive wide-angle and superzoom designs where the correction overshoots at different radii. Because it is not a simple radial function, it cannot be removed by a single distortion slider — it needs a proper lens profile with a multi-term polynomial model.
Examples in practice
A 16-35 mm zoom at 16 mm shows a horizon that dips near the middle and lifts again at the frame edges.