Carl Zeiss Touit 12 mm f/2.8
5. Chromatic and spherical aberration
Chromatic aberration
The crops below don’t leave any doubt when it comes to the longitudinal chromatic aberration - the tested lens simply doesn’t have the slightest problems with it.
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The same can be said about the lateral chromatic aberration which level is negligible, no matter what aperture you choose or what area of the frame you examine. A round of applause for the Zeiss.
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Spherical aberration
The first picture in this chapter shows clearly that there’s no trace of ‘focus shift’- it means the spherical aberration is corrected in the right way. Due to the significant depth of field, offered by the tested lens, we didn’t manage to perform a test based on defocused light points; it was simply impossible to get big circles in front of and behind the focus at the same time.
