Most helpful critical review
Iffy fit with some lenses. Falls off Metabones adapter.
on October 6, 2013
This rear cap fits most Micro4/3 lenses, but not all, and not equally well. Whereas the Oly and Panasonic rear caps seem to have a tight friction fit, the Fotodiox is a bit rattle-y. And it does not fit the Metabones Nikon F to M4/3 adapter at all. In other words, it falls right off. And no, the Metabones adapter is not cheaply-made. It is a high-quality adapter with a metal bayonet that exhibits no play on my OM-D E-M5, even with a heavy 135mm f3.5 attached.