I have several excellent Pentax-M legacy lenses (135mm/f2.5 & 50mm/f1.7) which I have been using, with an adaptor, on my Panasonic G1. Results have been so-so ! The adaptor, brand unknown, purchased on e-bay by one of my sons several years ago, is a bit "wobbly" and I battle to focus near infinity (I believe a common problem with cheaper MFT/PK [or other] adaptors). I have heard that Novoflex make superb MFT to legacy lens adaptors, but are expensive. The expense does not bother me much as quality always yields dividends. Has anyone out there used Novoflex adaptors ? If so, I'd be interested to read their comments.