In addition, almost to the edges very sharp. However, I would venture a look into the specialized market, because there are very favorable distributor.
Drawback: The fairly small lens it is to the max. Focal length dependent and has little room for maneuver if it is to be slightly less magnification. In addition, this adapter is difficult to store and the plastic housing huge. an Olympus macro lens is small (!!) and thus the flexibility of such supposedly "compact" suffers systems.