Olympus Zuiko Digital 35 mm f/3.5 Macro
7. Coma and astigmatism
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Like in the case of chromatic aberration and distortion, the coma here won’t be a problem for a photographer either – it is low even at the maximum relative aperture. It can be seen very clearly in the photo below which shows a diode image in the frame centre and in the corner as well.
An excellent image quality in the centre and on the edge doesn’t appear without a reason so a splendid astigmatism result didn’t come as a huge surprise. That aberration, understood in our tests as an average difference between horizontal and vertical MTF50 function values, amounted to just 2.2%. Once again a standing ovation for the Olympus.
