Canon EF 85 mm f/1.4L IS USM
5. Chromatic and spherical aberration
Chromatic aberration
To tell you the truth we are not especially fond of the longitudinal chromatic aberration correction of the tested Canon 1.4/85 IS. Such a top-end, expensive new lens should have performed better. The aberration is visible not only at the maximum relative aperture but also on stopping down to f/2.0. In that area both the Zeiss Milvus 1.4/85 and the Sigma A 1.4/85 fared better. |
When it comes to lateral chromatic aberration the news are better – just look at graphs based on data from the Canon 5D Mark III and the Canon 5Ds.
The highest level of that aberration you can observe near the maximum relative aperture but even there the aberration never reaches medium values, remaining low. On more significant stopping down you see it reduced to a very low level.
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| Canon 5D III, RAW, f/1.4 | Canon 5D III, RAW, f/5.6 |
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Spherical aberration
First photos of this chapter don’t feature any ‘focus shift’ effect. Still, as you can notice in the crops below, the circles we got in front of and behind the focus differ from each other more distinctly than in the case of e.g. the Sigma 1.4/85 or the Milvus 1.4/85. It means the spherical aberration is not corrected in a perfect way and adversely affects image quality near the maximum relative aperture.
| Canon 5D III, f/1.4, in front of | Canon 5D III, f/1.4, behind |
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