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Lens review

Olympus Zuiko Digital ED 70-300 mm f/4.0-5.6

17 March 2010
Szymon Starczewski

7. Coma and astigmatism


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The much-praised frame edge performance of the Olympus allows us to think that off-axis aberrations won’t be a huge problem. It is actually the case. The coma is well-corrected and the diode image in the frame corner - practically deformation-free.

Olympus Zuiko Digital ED 70-300 mm f/4.0-5.6 - Coma and astigmatism

Equally favourable situation can be observed in the case of astigmatism. The average result between horizontal and vertical MTF50 function values amounts to 6% which is a good result.