Irix 45mm F1.4 GFX Review

March 18, 2021 | Mark Goldstein | Rating star Rating star Rating star Half rating star

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

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 f1.8.jpg f1.8.jpg
f/2 f2.jpg f2.jpg
f/2.8 f2.8.jpg f2.8.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
f/22 f16.jpg f16.jpg