DISTORTION
None of these lenses produce much in the way of distortion
There’s very little distortion to worry about in any of the lenses on test, and some produce practically none at all. The Sigma 85mm is virtually a distortion-free lens, and the Canon RF 85mm F1.2 comes very close. The Canon EF 85mm f/1.8 gives very slight barrel distortion. The Canon EF 85mm f/1.2 and Canon RF 85mm F2 lenses score the worst, for barrel and pincushion respectively. Even with these two, however, the effect is minimal and will generally go unnoticed when it comes to day-to-day shooting.