Sony E 16 mm f/2.8
7. Coma and astigmatism
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The coma correction degree is good but its influence is noticeable at the maximum relative aperture and also on slight stopping down.
Like it was the case of the Sony NEX kit lens, the astigmatism can’t be assessed positively either. The resolution tests, conducted on both lenses and the only sensor available, showed the differences between vertical and horizontal resolution amounting to 20%. Without more lenses and/or other sensors’ tests it is really hard to say whether it is a result of high astigmatism of both lenses or the characteristic feature of the used matrix which has a different AA filter in different coordinates.
