Olympus M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro Review
Sharpness at 100mm
For these tests, the Olympus M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro lens was attached to an Olympus OM-D E-M1 Mark II compact system camera, which in turn was mounted on a sturdy tripod. The self-timer was used to avoid any vibrations from pressing the shutter release. Slight tonal changes are due to slight changes in natural light during the session.
The full frame at 100mm
Centre sharpness is soft wide open at f/4, with peak performance achieved at f/5.6-f/8. Diffraction kicks in at f/16 and gets worse at f/22. The corners aren't very sharp at f/4, with the best performance at f/5.6-f/11.
|Aperture||Centre Crop||Edge Crop|