Sharpness at 135mm

Our sharpness tests are carried out by photographing a real-world subject rather than a test chart. The Panasonic Lumix Pro 70-200mm f/4 O.I.S. lens was attached to a Panasonic Lumix S1R, which in turn was mounted on a sturdy tripod. Self-timer mode was activated to steady the camera completely. Any slight tonal changes you may see across the crops are a result of slight changes in natural light during the shooting session.

The full frame at 135mm

At this focal length, the centre of the image is very sharp at f/4. This level of sharpness is maintained throughout f/5.6 and f/8, before presenting a slightly softer image at f/11. At f/16 it’s ever so slightly less sharp again, and again at f/22 - the overall impression of sharpness at all apertures is very good, though. At the edge of the image, the best sharpness can be seen between f/11 and f/16.

Aperture	Centre Crop	Edge Crop
f/4
f/5.6
f/8
f/11
f/16
f/22