LensMount

Micro Four Thirds mount

Olympus / OM System, Panasonic · 2008–

Flange focal distance19.25 mm
Throat diameternot published by the manufacturer
TypeMirrorless
Formatsfour-thirds
Electronic contactsYes
Third-party autofocusOfficially licensed

An open standard shared across brands, so an OM System body takes a Panasonic lens natively. The 2× crop factor doubles the effective focal length.

Putting other lenses on a Micro Four Thirds body

Putting Micro Four Thirds lenses on other bodies

Micro Four Thirds lenses cannot usefully be adapted onto another mount. The mount is electronically controlled and its lenses have no aperture ring, so on a body that cannot speak to them they would sit stuck at a single aperture.