Fujifilm Fujinon XF 23 mm f/1.4 R
5. Chromatic and spherical aberration
The longitudinal chromatic aberration is a serious problem for fast, wide-angle lenses - the owners of e.g. the Nikkor AF-S 35 mm f/1.4G can be made painfully aware of it. On the other hand the Sigma 1.4/35 model proved that aberration can be corrected with a success. Unfortunately the Fujinon’s performance is closer to that of the Nikkor than to the Sigma’s. The longitudinal chromatic aberration is clearly visible and even the stopping down to f/2.0 doesn’t help with lowering its level.
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Better things we can say about the lateral chromatic aberration – it is slight, no matter what aperture you use, keeping near 0.07%.
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Spherical aberration
The spherical aberration is corrected properly – you can’t see its influence either as a ‘focus shift’ phenomenon or in defocused images of light points which are similar in front of and behind the focal plane.
