Lens review

Sigma 180 mm f/3.5 EX DG HSM Macro APO

8. Vignetting

Vignetting won’t be a huge issue as well. You can notice it in specific situations by f/3.5, where it reaches 16% (-0.51 EV). The level of this aberration decreases slightly to 13% on stopping down to f/4.0 and becomes practically zero (3%) by f/5.6.

In this category the tested Sigma fares a bit better than its friend from the same company, shorter by 30 mm. Of course we must still remember that we deal with f/2.8 maximum aperture there so the standards are a bit raised (the maximum diameter, gathering light effectively, is 2 mm bigger).