So I'm thinking about picking up this lens. I've been pretty happy with the Olympus 14-42mm kit lens for the most part as a walk around lens. But I'm leaning toward having a 12mm focal length. Has anyone had good luck with this lens on an Olympus body? If so, I have a few questions. 1. How bad is the purple fringing with Olympus Cameras? 2. Some reports state that its not as "wide" as the 12-50mm at 12mm on an olympus body. I've even seen a few sample images of this. Anyone else see this?