Lens distortion

With such a wide-angle lens, it's not surprising to see a little bit of barrel distortion (top). When fully zoomed in there's a little bit of pincushioning as well (bottom). The lens on my review sample was sharp at the center and fairly consistent edge to edge without significant softness.

Fringing in high-contrast areas of photos isn't much of a problem unless you're enlarging photos. At smaller sizes you'll likely only notice it in extreme cases, such as bare tree branches against a bright white sky.