Amazon.com: Digital Camera External Microphone Compatible with Olympus OM-D E-M5 Mark III Digital Camera, XM-AD2 Dual Channel XLR-Mini Audio Adapter for DSLR's, Camcorders and Pro Video Cameras : Electronics
The Leica M and the Olympus SEMA-1 Microphone Set | imagewings
using a rode videomic on a olympus pen camera using the sema 1 microphone set - YouTube