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Lens review

Tamron 24 mm f/2.8 Di III OSD M 1:2

30 June 2020
Maciej Latałło

5. Chromatic and spherical aberration

Chromatic aberration

Photos below show that the Tamron 2.8/24 deals with longitudinal chromatic aberration pretty well. If you look carefully at out-of-focus areas you can notice slight colouring but it's not a huge problem and it won't be bothersome in real life situations. Now let's check lateral chromatic aberration – below you see a graph with its results, depending on apertures, for both types of detectors.

Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration

What about the lateral variation of that aberration? The graph below shows its performance depending on aperture values for both types of detectors.

Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration


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In this case the tested lens should be praised as well. The results range from 0.04 to 0.05% so are on the borderline between low and very low levels. It means our photos will be completely free of that aberration.

A7R II, RAW, f/2.8 A7R II, RAW, f/8.0
Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration


Spherical aberration

The Tamron 24 mm f/2.8 Di III OSD M 1:2 doesn't show any focus shift effect and circles of light, reached before and after the focus, don't feature any distinct differences. That fact suggests there are no serious problems related to spherical aberration.

A7R II, f/2.8, before A7R II, f/2.8, after
Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration Tamron 24 mm f/2.8 Di III OSD M 1:2 - Chromatic and spherical aberration