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Lens review

Pentax smc DA 18-55 mm f/3.5-5.6 AL II

16 October 2009
Szymon Starczewski

7. Coma and astigmatism


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The degree of coma visibility, like in the case of its predecessor, is significant but here the Pentax doesn’t differ from the rivals, which also presented plenty of room for improvement when it came to that aberration correction level. When wide open, it is clearly seen that the aberration has a significant influence on the picture degradation. In this category you can hardly speak about better results.

Pentax smc DA 18-55 mm f/3.5-5.6 AL II - Coma and astigmatism

A slight improvement can be observed in the case of astigmatism, though. Previously, this aberration reached as much as 15% which was nothing to be proud of, but now it amounts to only 10%. Perhaps this result is far from ideal but nevertheless it pleases us much more than the previous one.