Sony E PZ 10-20 mm f/4 G
5. Chromatic and spherical aberration
Chromatic aberration
In a lens with such an aperture fastness and angle of view as that of the Sony PZ E 10-20 mm f/4 G you don't expect any serious problems with longitudinal chromatic aberration. Photos below prove that indeed you shouldn't worry about them at all. |
Lateral chromatic aberration might be a problem for instruments of this type for a change -let's check how the tested lens fared in this category.
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It's clear that the higher focal length the lower the aberration. All values we obtained range from 0.04% to 0.06% - it means that levels of lateral CA are small or very small. The Sony lens fares here beyond reproach.
| A7R III, RAW, 10 mm, f/16.0 | A7R III, RAW, 20 mm, f/16.0 |
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Spherical aberration
A significant depth of field, provided by the tested lens, makes it difficult to notice any 'focus shift' effect. Still, it doesn't mean spherical aberration is corrected in a perfect way and defocused circles of light we got before and behind the focus are the proof. The differences between them are clear; it means this aberration influences images you reach near the maximum relative aperture.
| A7R III, 20 mm, f/4, before | A7R III, 20 mm, f/4, after |
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