Suprisingly Sharp
I bought this for its long reach for wildlife photos. I also use it on an olympus body. Autofocus speed and tracking are fair, but that is also dependent on the camera body. Image quality is excellent, I have taken images with this lens that rival National Geographic. There is some purple fringing, but it is mild and easily removed in Photoshop. The lens and camera fell on a hard dirty surface when a cheap plastic aftermarket clip broke, but both still worked fine afterwards, so I would say it is a durable lens. All in all, quite pleased with this lens.
