My new E-M5 has nasty high ISO noise bands with 12-50 :-(

I wouldn't think it would make much difference adjusting shutter speed or aperture to get the same EV. But obviously I'm testing in a much brighter environment, considering I'm needing f/6.3 and 1/4000s to shoot -3EV!

I'll try it again tonight with both cameras in program mode using a dimmer environment and see what happens.

Give a man a match, and he'll be warm for a minute, but set him on fire, and he'll be warm for the rest of his life.