Nikon Z 20mm f/1.8 S Review

May 19, 2020 | Amy Davies |

Sharpness at 20mm

Our sharpness tests are carried out by photographing a real-world subject rather than a test chart. The Nikkor Z 20mm f/1.8S lens was attached to a Nikon Z7, which in turn was mounted on a sturdy tripod. Self-timer mode was activated to steady the camera completely. Any slight tonal changes you may see across the crops are a result of slight changes in natural light during the shooting session.

The full frame

The full frame at 20mm

At the centre of the image, sharpness is good at the widest aperture of f/1.8, with sharpness increasing again at f/2 and again at f/2.8. We can see the best (sharpest) results between f/4 and f/8, after which sharpness drops off a little again, with the softest results at the narrowest aperture of f/16. The overall impression when viewing images at normal printing sizes is good throughout the aperture range. At the edges of the frame, we can see the best results between f/5.6 and f/11.

Aperture Centre Crop Edge Crop
f/1.8 f4.jpg f4.jpg
f/2 f4.jpg f4.jpg
f/2.8 f4.jpg f4.jpg
f/4 f4.jpg f4.jpg
f/5.6 f5_6.jpg f5_6.jpg
f/8 f8.jpg f8.jpg
f/11 f11.jpg f11.jpg
f/16 f16.jpg f16.jpg