Sharpness at 45mm

Our sharpness tests are carried out by photographing a real-world subject rather than a test chart. The Irix 45mm F1.4 GFX was attached to a Fujifilm GFX 100S camera, 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 at 45mm

Centre sharpness is a little soft wide-open at f/1.4, but impressively high throughout most of the rest of aperture range, with peak performance achieved between f/2-f/11. Diffraction starts to kick-in at f/16.

Edge sharpness is not so good, with the lens producing its optimal sharpness between f/4-f/11.

Aperture	Centre Crop	Edge Crop
f/1.4
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22