Sony FE 50 mm f/1.8
5. Chromatic and spherical aberration
Chromatic aberration
The tested lens doesn’t have any problems with the longitudinal chromatic aberration. Its delicate influence can be noticed but in this class of equipment the Sony fares the best, being slightly better than the Canon EF 50 mm f/1.8 STM, a tad better than the Nikkor AF-S 50 mm f/1.8G and distinctly better than the much more expensive Sonnar T* FE 55 mm f/1.8 ZA. |
The graph below presents the performance of lateral chromatic aberration depending on aperture values and the detector used.
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It is clear the lateral chromatic aberration is not a problem at all. Near the maximum relative aperture its level remains negligible; on stopping down it can increase to 0.05-0.07% but even these values we consider low. Other 1.8/50 lenses mentioned in this chapter didn’t have any problems with that aberration either so the competition is especially high in that category.
| A7R II, RAW, f/2.0 | A7R II, RAW, f/11.0 |
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Spherical aberration
First photos of this chapter don’t feature any ‘focus shift’ effect. Additionally, when you consult defocused circles of light we created in front of and behind the focus, you won’t notice anything disturbing either. These facts allow us to say that the tested lens doesn’t have any noticeable problems with spherical aberration.
| A7R II, f/1.8, in front of | A7R II, f/1.8, behind |
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