0.9% barrel distortion
3EV vignetting wide open and 1.6EV at f/2 and less than 0.5 EV at f/4 and smaller
centre sharpness is good wide open becoming excellent at f/2-f/8
soft in edges wide open but becomes “good to very good” at f/2.8-f/8
well controlled CA
nice bokeh can be nervous