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Lens review

Olympus Zuiko Digital 14-54 mm f/2.8-3.5

3 March 2010
Szymon Starczewski

7. Coma and astigmatism


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Coma is not a serious problem for the tested lens as you can see in the picture below. The deformations of the circular diode image in the frame corner are visible at every focal length but they are small – noticeably smaller than in the case of the ZD 14-42 mm and the Leica. Actually the ZD 12-60 mm had them at the same or a minimally lower level.

Olympus Zuiko Digital 14-54 mm f/2.8-3.5 - Coma and astigmatism

We have no serious reservation about astigmatism either, which value we measured as 4.1%. Here the ZD 14-54 mm performs minimally better than the “kit” lens, a tad worse than the Leica and practically similarly than the ZD 12-60 mm. In actual facts, though, the whole astigmatism values range of these lenses, from 3.7% to 5.0%, is contained within the margin of errors, reaching about 1% in this case.