Lens distortion

There some noticeable barrel distortion at the wide end of the lens (top) that's visible in both photos and movies. There even seems to be a little with the lens extended (bottom). The lens has OK center sharpness, but at least it's consistent edge to edge; my review camera only had a little bit of softness in the upper corners. I did see fringing in high-contrast areas of photos, but for the most part it's only visible when photos are viewed at full size.