Hi, I have the GF1, I see a lot of ads for various lenses that say they are for micro four thirds mount and then only mention Olympus - can you please confirm if this also means Panasonic GF1? I am confused as to whether I need an adaptor or not, so in other words can lenses be swapped back and forth between Panasonic GF1 and the Olympus Micro four thirds range without the need for any adaptor? If so will the autofocus work? many thanks!