I just picked up a used Voigtlander 15mm f/4.5 (newer Leica M mount), and bought an M to M43rds adaptor from Rainbowimaging on eBay. I have purchased 5 different adaptors from them for different lenses, and all have been excellent, but this M adaptor won't allow for infinity focusing! I held the lens in front of the GH1 with no adaptor, and it seems like it needs to move back 1mm or so closer to the sensor in order to achieve infinity focus. Rainbowimaging says they've tested the adaptor and it should actually go a little PAST infinity, but it should not stop BEFORE infinity is achieved. They have offered a full refund, but I'm now wondering if the newer 15mm M mount is incompatible with M adaptors?? Anyone have a 15mm M mount + adaptor that focuses to infinity? If so, which one. I have no problem spending the big bucks on a Pana or Novoflex adaptor, but not if it's going to have the same problem. Note that the Rainbowimaging adaptor I got seems to be the exact same one as Amazon sells under the Fotodiox brand name.