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Lens review

Sigma 150 mm f/2.8 APO EX DG OS HSM Macro

24 August 2011
Szymon Starczewski

8. Vignetting

The crops below show how the vignetting looks like when you use the smaller APS-C/DX sensor.

Sigma 150 mm f/2.8 APO EX DG OS HSM Macro - Vignetting


It is clear that this aberration is hardly a serious problem here. At the maximum relative aperture the relative brightness loss in the frame corners amounts to 27% (-0.90 EV) and it disappears practically completely (the level of only 3%) by f/4.0. On full frame the vignetting level is higher – you can see it in the photos, presented below.

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Sigma 150 mm f/2.8 APO EX DG OS HSM Macro - Vignetting

In fact only at the maximum relative aperture we could complain a bit – the vignetting there is 37% (-1.31 EV) and easy to perceive. The problems disappear by f/4.0 where the light fall-off in the frame corners is just 16% (-0.50 EV). By f/5.6 the vignetting disappears completely, amounting to just 3%.