Sharpness at 50mm

For these tests, the Olympus M.ZUIKO Digital ED 14-150mm f/4-5.6 II lens was attached to an OM-D E-M5 II body, which in turn was mounted on a sturdy tripod. The self-timer was activated. The 100% crops represent about 1/400th of the total frame area.

The full frame at 50mm

Centre and corner sharpness is best at f/8 Performance gradually decreases from there, although again it does not reach unacceptable levels until you hit f/22.

Aperture	Centre Crop	Edge Crop
f/5.5
f/8
f/11
f/16
f/22