Sharpness Cont... 2

Sharpness at 200mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The LUMIX G VARIO 100-300mm F4.0-5.6 MEGA O.I.S. lens was attached to a Panasonic Lumix DMC-GH2 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 200mm

Centre and edge sharpness is best at f/5.6-8.0, i.e. between wide open to stopped down a little. Performance gradually decreases from there, although again it does not reach unacceptable levels until you hit f/16.

Aperture	Centre Crop	Edge Crop
f/4.9
f/5.6
f/8
f/11
f/16
f/22