Tamron SP AF 70-200 mm f/2.8 Di LD (IF) MACRO review - Vignetting

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Tamron SP AF 70-200 mm f/2.8 Di LD (IF) MACRO

29 July 2009

Arkadiusz Olech

8. Vignetting

The test on a small APS-C matrix format is perhaps not as demanding as it should be for a lens designed to work on full frame, but it’s worth checking anyway how the instrument will fare in this category.

The Tamron’s results are in fact similar to those of the Sigma or the L Canon lenses. The differences for particular focal lengths are just several percent at most, often within the margin of error.

Tamron SP AF 70-200 mm f/2.8 Di LD (IF) MACRO - Vignetting

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At 70 mm and wide open the frame corner brightness loss is 15% (-0.46 EV) and it decreases very quickly to an imperceptible level on stopping down, by f/4.0 amounting to only 3%.

Almost identical situation we have at 135 mm. By f/2.8 the vignetting reaches 14% (-0.43 EV) and it decreases to 3% by f/4.0.

Like in the case of its rivals, the vignetting is the most visible at 200 mm. At maximum aperture the frame corner brightness loss is 23% (-0.76 EV) and it decreases to only 6% at f/4.0

Using a converter makes the situation better again. At 280 mm and by f/4.0 the vignetting is 14% (-0.44 EV) and it decreases to 2% by f/5.6.