Robin Wong posted the full review of the new Olympus 17mm f/1.2 PRO lens on Ming Thein’s site:
The Olympus M.Zuiko 17mm F1.2 PRO changed my perspective of working with this focal length, especially considering I did not expect to fall in love with this lens.
The lens is incredibly sharp even when shooting wide open. The sharpness is uniform from edge to edge. The bokeh is beautiful and soft, resulting in pleasing and natural looking images. Technical flaws are well controlled with no noticeable distortion, minimal chromatic aberration and good flare control. AF is speedy and reliable. the lens just works and it exceeded my expectations.
Of the three F1.2 lenses, I am surprised to conclude that this 17mm F1.2 is my personal favourite.