Sharpness at 21mm

Our sharpness tests were conducted using a Sony A7R II camera mounted on a tripod. The camera’s shutter release was also set on a timer-delay to avoid any possible camera shake. The test subject was shot using ambient lighting, hence some colour and contrast variation is to be expected between apertures.

The full frame at 21mm

Centre sharpness is impressively high throughout almost the entire aperture range, with peak performance between f/4-f/16. Corner sharpness isn't as good, though, producing optimal sharpness at f/8-f/16.

Aperture	Centre Crop	Edge Crop
f/3.5
f/4
f/5.6
f/8
f/11
f/16
f/22