Sharpness at 50mm

For this test, the Fujifilm XF 50mm F1.0 R WR lens was attached to a Fujifilm X-Pro3 body, which was in turn mounted to a sturdy tripod. Exposure delay mode was activated. Tonal and colour variance across the crops are due to change in natural light during the session.

The full frame at 50mm

The centre is a little soft wide-open at f/1, but is already pleasingly sharp at f/1.4, with peak performance achieved in the f/2-8 range.

Diffraction is only noticeable by its complete absence, which means that you can safely use this lens at f/11 and f/16.

The edges are soft from f/1 through to f/2, sharpening up sufficiently at f/2.8, with f/8 being the optimum setting.

Aperture	Centre Crop	Edge Crop
f/1
f/1.4
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16