I recently got an E-PM2 and am evaluating whether to keep that or my GF5. With the Panny 20mm/1.7 (my most-used lens) I've noticed a few issues with the EPM2 related to focusing. 1. It uses the focus assist beam a lot (even in a well-sunlit room) 2. It's often slow to focus or doesn't lock on at all 3. If I tap on the screen, away from the center, it still tries to focus the center of the frame instead of where the green box is. (This may only be when it uses the assist lamp, but that's basically any time I'm not directly under the sun.) Is this normal? Is there something I can adjust to make the EPM2 not so sluggish and clumsy? After over 3,000 shots on the GF5 with this lens I've never had so much trouble.