Discovered something I haven't seen anyone mention with the Olympus 12-40 and E-M1. If you have the E-M1 set for focus peaking to come on automatically with manual focusing, with the existing primes with snap focus, you don't get focus peaking automatically when using the snap focus ring. You have to manually enable focus peaking. But with the 12-40 lens, focus peaking automatically comes on when you use the snap focus ring. This is how it should work. Given it works on this lens I wonder if they can update the firmware on the existing primes to fix this.