Panasonic 45mm f/2.8 MACRO
Correct--there's no hard stop on the focus ring.
Wish I could help you with your question regarding the EM-5; I am seriously lusting after this camera, but it's just not in the budget right now However, I've been using this lens for the past two years on a Panny G1, and aside from hunting for focus (usually only when trying to shoot macro), I LOVE this lens--the quality of the photos I get with it are wonderful
If everything happens for a reason, what's the reason?!