Exposure. In our Indoor Portrait flash test, the Olympus E-M10 underexposed our subject, even with +1.0 EV flash compensation. The camera's Slow-Sync flash mode produced much better results at +0. ...

Okay, the OM-1 looks like a standard digital camera. But the OM System OM-5 and the Olympus OM-D E-M10 Mark IV are both styled after vintage SLR-style bodies. So, if it's not making a new PEN-F ...