Olympus M.ZUIKO Digital 40-150mm f/2.8 Pro Review
Sharpness at 70mm
For these tests, the Olympus M.ZUIKO Digital 40-150mm f/2.8 ED Pro lens was attached to an Olympus E-M5 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 70mm
Sharpness at 70mm is very high wide open, and peaks at f/5.6. The f/8 and f11 settings are also usable without serious restrictions, but once again diffraction severely impacts resolution at f16 and f22. Sharpness uniformity across the frame is excellent.
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