Sharpness at 135mm

To examine sharpness, the Nikkor AF-P 70-300mm lens was attached to a Nikon D7500 body, which in turn was mounted on a sturdy tripod. Exposure delay mode was activated to prevent further camera movement. Any changes in tone and colour across the images is due to changes in natural light during the session.

The full frame at 135mm

Centre sharpness at 135mm is very good at f/4.8, but is sharper from f/5.6, and sharper again between f/8 and f/11. Sharpness drops a little at f/16, and drops with each stop up to f/25, but remains good throughout. At the edges, sharpness is good at f/4.8-f/5.6, getting progressively sharper until the sharpest point which is f/22. Diffraction means sharpness drops off again at f/25.

Aperture	Centre Crop	Edge Crop
f/4.8
f/5.6
f/8
f/11
f/16
f/22
f/25