Got this lens with my Epson R-D1 but could not wait to try it adapted to the M43 bodies. I got a Chinese adapter from ebay but it sucked so I sent it back and got a Panasonic adapter. Tried it first with the GX7 and frankly I was a little disappointed. Then I was playing with the EP5 and got a pretty awesome shot. So it tried the same shot with the GX7 and sure enough, for some reason the GX7 does not produce as sharp and nicely rendered shots IMHO... They are very similar, but to my eye, zoomed in LR they are quite different. First shot is with GX7 and the last one is with the EP5. BTW, it is also a lot easier to focus manually with the EP5. both shots handheld.. I focused both on the hinge of the spout.