Sigma 50-150 mm f/2.8 APO EX DC HSM
5. Chromatic aberration
At 50 mm aberration is almost the same for all aperture settings and climbs almost to 0.10%. It is average value.
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For focal lengths of 100-150 mm CA increases dramaticaly from low-medium to very high level during stopping down the lens. You can see it for yourself on pictures below.
