I picked the lens up from my office on the way into an evening of work. Initial impressions were that it was not as overwhelmingly big and heavy as expected. I guess I'm familiar with the heft of the DFA*70-200. It feels like a natural mate for the K-1.
My evening case was a complicated one, so I was a bit distracted. There was however a brief period in cruise control during which I managed some quick snaps to redress the dearth of humans in this thread so far.
Both wide open. Bigger versions in Flickr, but I can post 100% crops if desired. The detail around the eyes is remarkable.