Sharpness at 12mm

For this review, the sharpness test is carried out using a real-world subject, rather than a test-chart. For this part of the test, the AF-S Fisheye Nikkor 8-15mm f/3.5-4.5E ED Lens was attached to a Nikon D810, which in turn was secured to a sturdy tripod. Any variances in light and tone are due to natural changes in light during the session.

The full frame at 12mm

At the widest aperture, sharpness is very good, but is best between f/5.6 and f/11. At f/16 it’s a little softer, while at f/22 it’s very soft. At the edge, sharpest results can be seen between f/5.6 and f/16, while at f/22 softness is quite noticeable.

Aperture	Centre Crop	Edge Crop
f/4.2
f/5.6
f/8
f/11
f/16
f/22
f/27