The is an AF Focus Lens mount adapter for use with Panasonic LUMIX G Micro System Cameras and Olympus Micro Four Thirds PEN digital cameras * It allows you to mount a regular 4/3 system lens on a Micro 4/3 System Camera, fully compatible with all lens functions including autofocus. * With Metal tripod ring, very easy to install and remove * 100% replaces Panasonic Lumix G 4/3 DSLR Mount Adapter, Olympus MMF-1, MMF-2 and MMF-3 Adapter * Fits All Micro 4/3 Four Thirds System Cameras, including Olympus PEN E-P1, E-P2, E-P3, PEN E-PL1 E-PL2 E-PL3 EM5 EM-P1 EM-P2, Panasonic Lumix G1 G2 G3 G10 GH1 GH2 GH3 GF1 GF2 GF3 GF5 GX1, and new models