I've invented another thread. I have all these OM-lenses, and some of them are rather good. When I feel rich, I'll probably buy a Speed Booster too, but for now, the Terrible Junk Adapter will have to do.
E-M1 with OM Zuiko 100mm f/2.8 @ f/4
I forgot to clean up CA, but I'm impressed how clean the results are from this cheap, little lens. It's a first generation "Silver Nose", more than 30 years old.