Olympus VF-1 Optical Viewfinder for use with Olympus PEN and OM-D  Micro Four Thirds Digital Cameras
Optical viewfinder for use with the 17mm f2.8 pancake lens or 17mm f1.8 lens on Micro 4/3 cameras. This externally-attached optical viewfinder supports shooting with the 17mm lenses. It uses a bright 17mm frame to enable comfortable picture composition.