Olympus

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Pros:

• good quality casing,
• sensational image quality in the frame centre,
• sensible resolution on the edge of the frame,
• slight lateral chromatic aberration,
• moderate vignetting,
• nice out-of-focus areas,
• silent and fast autofocus,
• good price quality ratio.

Cons:

• a bit too high longitudinal chromatic aberration,
• not completely corrected spherical aberration,
• too high distortion,
• coma visible in the corners of both types of detectors,
• noticeable astigmatism.