Sharpness at 25mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Panasonic Lumix G 25mm f/1.7 ASPH lens was attached to a Panasonic Lumix DMC-GX7 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 25mm

Centre sharpness is best at f/2.8-f/11, while the edges are acceptably sharp from f/4 to f/8.

Aperture	Centre Crop	Edge Crop
f/1.7
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22