Can you tell that Columbo was my favorite television detective?
"Just one more thing"...
With your camera on the tripod, do turn IS off and make sure the
camera doesn't go to sleep during this session. When the E-M5 wakes
up, the sensor doesn't always land in exactly the same spot and with
IS turned on you will get positional drift.
Positional Drift -- also known as "Restless Sensor Syndrome"
Themed Olympus Photo Exhibition: http://www.tope.nl/