Eric Sorensen

You can easily darken the corners, but post-processing to get the creamy bokeh of a f1.2 shot doesn't work very easily - at least I will know the difference.  Maybe not the customer?

This lens is designed for portraits - Who needs sharpness at the edges when doing portraits?  In fact, I prefer blurry and dark corners.  It's plenty sharp in the center where the eyes and faces are.

I think the 2nd one (85mm) would look more like the first one if you had moved closer and shot at F1.2 Like this shot here, where the background is smoother.