Tamron 28-75mm F2.8 Di III RXD Review

June 7, 2018 | Mark Goldstein |

Tamron 28-75mm F2.8 Di III RXD Sharpness at 28mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Tamron 28-75mm F2.8 Di III RXD lens was attached to a Sony A7 III 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 28mm

Center sharpness is outstanding between f/2.8 and f/16. At f/22 sharpness is beginning to drop off a little due to diffraction. Edge sharpness is best between f/5.6 and f/11.

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