I picked up a used copy of this lens for my E-M1. It's a design for full frame, so it's large. Nonetheless, I love it. It focuses well and quickly, even with C-AF. I got a sharp copy. This will help me control my 42.5 1.2 PanaLeica GAS. Here are a few shots of vintage Christmas decorations, and a couple obligatory cat shots. All wide open.