I just bought one of Rainbowimaging's Nikon to micro 4/3rds adapters for my GF1. It has a little play when mounted, but otherwise seems to work fine, except when focused at infinity. I thought I would just be able to turn the focusing ring to infinity and not have to focus when shooting at a distance, but it seems to focus past infinity and I have to back the focus off a little to be in focus at infinity. I'm wondering if this is common when mounting a lens with an adapter or if my adapter just has a problem? Would focus at infinity be more precise with one of the more expensive adapters, such as Rayqual or Novoflex?