Sharpness at 50mm

For this test, the Sigma 50mm F1.2 DG DN Art lens was attached to a Panasonic Lumix S5II body, which was in turn mounted to a sturdy tripod. Exposure delay mode was activated. Tonal and colour variance across the crops are due to change in natural light during the session.

The full frame at 50mm

Centre sharpness is very good wide-open at f/1.2, and outstanding from f/2 through to f/11, with f/16 being adversely affected by diffraction.

The edges are just as sharp as the centre, with f/2 to f/11 again producing the sharpest results.

Aperture	Centre Crop	Edge Crop
f/1.2
f/1.4
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16