Olympus M.Zuiko Digital 17mm f/1.8 Lens (Black) V311050BU000 B&H
The Olympus 17 1.8 Lens Review on the E-M5 by Steve Huff | Steve Huff Hi-Fi and Photo
Amazon.com : Olympus M.Zuiko 17mm f1.8 (Silver) for Olympus and Panasonic Micro 4/3 Cameras - International Version (No Warranty) : Camera Lenses : Electronics