Using Four Third lenses on m4/3 does work (the PL 14-150 is a good example) but some are not optimized for contrast detec focusing and performance is abysmal to say the least. This lens is an okay  performer on Four Third cameras, not brilliant, just okay. When shooting macro AF doesn't play a role for me and I focus manually with every macro lens I own. It's just as well because putting this on a m4/3 camera via a four thirds to m4/3 adapter doesn't enhance it's performance in any way. Takes nice images though.