Canon EF 16-35mm f/2.8L III USM Review

October 17, 2016 | Mark Goldstein |

Sharpness at 24mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Canon EF 16-35mm f/2.8L III USM lens was attached to a Canon EOS 5D Mark IV body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frameThe full frame at 24mm

Center and edge sharpness are excellent wide-open at f/2.8 and nothing short of outstanding between f/4 and f/11. At f/22 sharpness across the frame is beginning to drop-off due to diffraction, but is still commendably high.

Aperture Centre Crop Edge Crop
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 f22.jpg f22.jpg