Nikon 12-24mm f/4 Wide Angle Lens - Sharpness Wide Open vs f/5.6
Brick wall test at f/4 and f/5.6. Some sharpness/contrast fall-off that I remember from my earlier copy of the lens, but not terrible. Slightly worse at 12mm than 24mm; sharpness at both focal lengths is fine by f/5.6.
The top row equals normal (800dpi) web-size photos. The lower row includes expanded (2400dpi) inch print-size versions for closer inspection.