Sharpness Cont... 3

Sharpness at 150mm

For these tests, the Olympus M.ZUIKO Digital 40-150mm f/4-5.6 ED lens was attached to an Olympus E-P2 body, which in turn was mounted on a sturdy tripod. The self-timer was activated. The 100% crops represent about 1/300th of the total frame area.

The full frame at 150mm

Centre sharpness peaks in the f/8-f/11, while the edges look best at f/11. The f/16 setting is entirely usable but f/22 is predictably poor.

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