Sharpness Cont... 3

Sharpness at 105mm

For these tests, the Nikon AF-S Nikkor 18-105mm f/3.5-5.6G VR lens was attached to a Nikon D7000 body, which in turn was mounted on a sturdy tripod. Exposure delay mode was activated. Tonal and colour variances across the crops are due to changes in natural light during the session. The 100% crops represent about 1/400th of the total frame area.

The full frame at 105mm

The central areas of the frame are sharpest with the lens used wide open, but the borders don't sharpen up until you hit f11.

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