For this review, the lens was tested on a Canon EOS 5DS R using Imatest. Barrel distortion measures at -0.26%, a very low figure that is close to perfectly rectilinear. There should be no problem ...

We're nearly at the end of our 12 lenses ... The Mark II was claimed to be even sharper, to suit cameras with 40+ megapixel image sensors, and is available in Sony E, Nikon Z, Canon R and L ...

The taller the column, the better the lens performance. For this review, the lens was tested on a Canon EOS R using Imatest. CA (Chromatic Aberration) is so low as to be virtually absent.