Sigma 150-500 mm f/5.0-6.3 APO DG OS HSM review - Vignetting

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Sigma 150-500 mm f/5.0-6.3 APO DG OS HSM

16 July 2009

Arkadiusz Olech

8. Vignetting

On a small matrix of our test camera, the Canon 20D, the vignetting won’t cause you any problems. At the shortest focal length and wide open it is imperceptible and reaches just 8% (- 0.23 EV). Very similar results we get at 250 mm where the highest vignetting level was just 7% ( -0.21 EV). Almost equally good performance might be noticed near 370 mm where at maximum relative aperture (f/6.3) the corner illumination loss was just 12% and by f/8.0 it decreased to 6%.

Sigma 150-500 mm f/5.0-6.3 APO DG OS HSM - Vignetting

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Maximum aperture is a setting where the vignetting is the most visible. By f/6.3 it reaches 19% ( -0.60 EV) but by f/8.0 it decreases to 13% and disappears almost completely by f/11, where it amounts to only 6%.