Distortion measures – 1.98% barrel, which is pretty good for a 20mm lens. Further correction is possible in-camera or in software, but for most subjects, this would not be an issue. Bokeh ...

At 20mm, central sharpness is ... The taller the column, the better the lens performance. CA (Chromatic Aberration) is measured with any in-camera corrections switched off, as far as we can ...