Sigma S 150-600 mm f/5-6.3 DG OS HSM
5. Chromatic and spherical aberration
The Sigma S 150–600 mm f/5–6.3 DG OS HSM doesn’t have any problems with longitudinal chromatic aberration and a photo, shown below, proves that much. It seems that the numerous low dispersion elements in the construction work as they should.
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The lateral chromatic aberration can be described in similar terms – its performance on the edge of the APS-C sensor and full frame is presented below.
Like in the case of the resolution performance, the results can be divided into two groups. At the shorter focal lengths the chromatic aberration remains simply imperceptible. You can glimpse it only at 450-600 mm but even there you deal with values on the borderline between low and medium levels. No reasons to complain.
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Spherical aberration
The lens didn’t have any ‘focus shift’ effect, no matter what aperture was used. The appearance of defocused circles of light was also perfectly acceptable – their images in front of and behind the focal point were very similar, without any differences. It means the lens corrects the spherical aberration very well.
