Sharpness at 28mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Samsung S 16-28mm f/2-2.8 ED OIS lens was attached to a Samsung NX3000 body, which in turn was mounted on a sturdy tripod.

The full frame at 28mm

Centre sharpness is quite good at f/2.5, and improves further upon stopping down to f/4. The effects of diffraction become visible at f/11 but do not become a serious problem until you hit f/22. The edges are commendably sharp too, peaking at at f/5.6 and f/8.

Aperture	Centre Crop	Edge Crop
f/2.5
f/4
f/5.6
f/8
f/11
f/16
f/22