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Lens review

Sigma 120-400 mm f/4.5-5.6 APO DG OS HSM

20 October 2009
Szymon Starczewski

5. Chromatic aberration

Three APO letters and three low-dispersion elements, in the chromatic aberration category, surely obligate Sigma to something. The competitors behave variously here. Canon 100-400 IS set the standards pretty high, here, because in its case aberration never exceeded 0.1%. Tokina 80-400 mm looks totally different, at 80 mm has an acceptable level of this aberration, and at 300-400 mm breaks all records reaching over 0.3%.

Sigma 120-400 mm f/4.5-5.6 APO DG OS HSM - Chromatic aberration

Sigma’s definitely closer to the distinctly more expensive Canon. For vast combinations of the focal lengths and apertures aberration in small, or medium and only at 400 mm, after strongly stopping down, aberration reaches just over 0.1%. Generally, using Sigma 120-400 mm OS, we shouldn’t experience any problems with chromatic aberration.

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Sigma 120-400 mm f/4.5-5.6 APO DG OS HSM - Chromatic aberration