Commlite Electronic Auto Focus Lens Mount Adapter Ring for 4/3 Lens to Olympus M4/3 Auto-focus function Aperture exactly being adjusted via the mount adapter Suitable Cameras: Olympus E1 E2 E3 E-P3 E-PL3 E-PM1 E-PL2 High-quality Aluminum alloy made Including two tubes (10mm, 16mm), 3 different combinations