Tamron SP AF 17-35 mm f/2.8-4 Di LD Aspherical (IF) review - Vignetting

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Tamron SP AF 17-35 mm f/2.8-4 Di LD Aspherical (IF)

5 October 2010

Arkadiusz Olech

8. Vignetting

Designed to work on full frame, the Tamron 17-35 mm on a small APS-C sensor should deal with the vignetting pretty well. Indeed its level is not very high. At 17 mm and maximum relative aperture the light fall-off in the frame corners amounts to 22% (-0.70 EV) and on stopping down to f/4.0 it decreases to 12%. Applying f/5.6 makes the problem disappear almost completely (9%).

Tamron SP AF 17-35 mm f/2.8-4 Di LD Aspherical (IF) - Vignetting

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A better situation we saw in the middle of the focal range where, by f/3.5, we had the vignetting level of 17% (-0.54 EV) which, on stopping down to f/4.0 decreased to 11% and then by f/5.6 dropped even further to 11%.

The fewest problems concerning the vignetting we will have working at 35 mm. Even at the maximum aperture the brightness loss in the corners reaches just 15% and, on stopping down to f/5.6, it becomes marginalized completely (5%).