Sony FE 35 mm f/1.8 review - Chromatic and spherical aberration

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Sony FE 35 mm f/1.8

2 November 2020

Maciej Latałło

5. Chromatic and spherical aberration

Chromatic aberration

Producers didn't put any low dispersion glass elements in the construction of the tested lens and, I suppose, that decision backfired. Problems connected to longitudinal chromatic aberration are quite distinct, visible even on stopping down the aperture by 1 EV.

Sony FE 35 mm f/1.8 - Chromatic and spherical aberration

Fortunately, when it comes to correction of the lateral version of that aberration the situation is far better – below you can find a graph that shows its correlation with the used detector and aperture values.

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Near the maximum relative apertuer chromatic aberration remains negligible but its level increases on stopping down and in the range from f/4.0 to f/22.0 it stays near 0.06-0.07%. These values also shouldn't make you especially worried so we can't have any serious reservations in this part of the test.

A7R II, RAW, f/1.8	A7R II, RAW, f/11.0

Spherical aberration

First photos of this chapter don't show any distinct 'focus shift' symptoms so spherical aberration level can't be high or very high. Additionally, defocused circles of light reached before and after the focus look similar. As you see, there are no reasons to get worried about the performance of the Sony FE 35 mm f/1.8 in this area.