I just got my Olympus 45 today (very impressive thing that it is) but I stumbled across something odd. It focuses faster on my Panasonic G2 than it does on my E-P3. The E-P3 seems to hunt quite a bit more. I need to go through and make sure the are set up the same but it kind of caught me by surprise. Very cool lens though. Excited to get it out today (it's not raining).