The lens is quite large and heavy. It's manual focus, although there isn't a whole lot that you can do in terms of focus! Unless there are objects within 1.5 m (~5 ft), you can leave settings basically at infinite focus and away you go, it's that simple. That said, I have not been able to get really sharp focus at the more open f/apertures but that is a function of the lower light of late afternoon strolls in mid November here in Southern Alberta.
So far I am pretty happy with the lens although I find it quite big and heavy. For something smaller for 'grab and go' situations, I would sooner use the Olympus 9 mm f/8 lens cap.
Photos hosted here (on google photos)