>>2971330I also have an XP2 and the non-APD 56. I can back what the other anon said up, the 56 isn't a fast-focusing lens in anybody's book, but it IS generally quite accurate. It may take a few seconds to focus, but it almost always gets it right once it's done.
I wish I had more examples to post but I've been in a slump for the last year and haven't done many shoots.