Adapter, 4/3 to m4/3!

The MMF-1 was built when the E-P1 was released, camera which was so slow to focus with even m43 lenses in the first firmware version that I guess it didn't make much difference with 4/3 lenses via adapter

The MMF-2 was a cheaper version built for the MMF-2 + 4/3 40-150mm mk2 kit which was sold when the m43 40-150mm was still not ready.

The MMF-3 is a weatherproofed version of the MMF-2 to match the OM-D, better materials though. I ran mine through a Niton analyzer and it "beeped" quite some titanium in the results.