Canon EF-S 17-55mm f/2.8 IS USM Review

July 5, 2013 | Mark Goldstein | |

Sharpness at 20mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Canon EF-S 17-55mm f/2.8 IS USM lens was attached to a Canon EOS 700D 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 20mm

Centre sharpness remains high through from f4 to f/11, with f/16 and f/22 being adversely affected by diffraction. The edges are almost as sharp as the centre, with f/4 to f/11 again producing the sharpest results.

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