Viltrox Four Thirds Adapter, Micro Four Third (M 4/3) to Four Third (4/3) Lens Adapter JY-43F-02 black (US) Allows auto focus function with your Four Thirds System (4/3) lens to Olympus PEN E / Panasonic Lumix G Micro 4/3 camera: This lens mount adapter makes it possible to mount any existing Four Thirds lens on the PEN for use in AF shooting. It is for Micro Four Thirds (M 4/3) Lenses to Four Thirds (4/3) Cameras. 100% compatible with original Olympus MMF-2 Lens mount: Four Thirds mount, Body mount: Micro Four Thirds mount Weight: 83g (2.9oz.). Dimensions: 65mm*19.5mm. Olympus E-PL1 E-PL2 E-PL3 EP-1,EP-2,EP-3, E-PM1,E-M5. and other E-P series cameras. Panasonic G1, G2. G3? GF2. GF3. GH2.GX1. G10. All Olympus / Panasonic and other Four Thirds system lenses