Olympus Zuiko Digital 25 mm f/2.8
7. Coma and astigmatism
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The influence of coma on the circular diode picture can be noticed. Because the coma is an off-axis aberration, there are no distortions in the frame center, but in the frame corner its influence, although slight, can be visible. It’s not a serious problem, though, nothing to worry about anyway.
We can say the same about the astigmatism. It’s level reaches 7% which is a good result.
