Sharpness at 100mm

For this review, the sharpness test is carried out by photographing a real-world sample, rather than a test chart. The Fujifilm XC 50-230mm f/4.5-6.7 OIS II was mounted on a Fuji X-A3, which was in-turn mounted on a sturdy tripod. Exposure delay was activated to prevent camera-shake. Any changes in tone you might see across the crops are due to natural light changes during the shooting session.

The full frame at 100mm

At 100mm, there’s good sharpness at f/5.4 (the widest aperture at this focal length), being best between f/5.6 and f/11. From f/16 diffraction causes some softness, with it being most apparent at f/16. At the edges, the best sharpness can be seen at f/11.

Aperture	Centre Crop	Edge Crop
f/5.4
f/5.6
f/8
f/11
f/16
f/22