Sharpness at 25mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens was attached to a Panasonic Lumix GH5 II camera body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frame at 25mm

Both centre and edge sharpness are excellent from f/1.7-f/8. Diffraction starts to affect the image sharpness from f/11 onwards.

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