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Lens review

Canon EF 85 mm f/1.8 USM

8 March 2011
Arkadiusz Olech

5. Chromatic aberration

When it comes to the longitudinal chromatic aberration it would be very difficult to avoid it in such a fast lens. The Canon 1.8/85 is not an exception to the rule as you can see perfectly well in the photos of our autofocus testing chart, presented in chapter 10. You can notice problems with correction of the shortest wavelengths and near the maximum relative aperture it might cause the appearance of purple-blue borders.

The beautiful correction of the lateral chromatic aberration deserves our highest praise for a change. The first graph shows values we got on the edge of the APS-C sensor and the second graph – the edge of full frame.

Canon EF 85 mm f/1.8 USM - Chromatic aberration

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Canon EF 85 mm f/1.8 USM - Chromatic aberration

In both cases the values, measured by us, don’t exceed a level of 0.03% and it means the lateral aberration is practically imperceptible. Our test chart crops confirm it as well.


Canon EF 85 mm f/1.8 USM - Chromatic aberration