First of all, this lens is built like a tank. The all-metal body with lots of glass fits the rather heavy lens. It works well on the OM-D EM-1 and I've set the FN1 button to activate focus preview mode, making focusing this lens fast, easy and accurate, which is very important at F0.95! I found the edges of the lens to be a bit soft when it's fully open (F0.95) but that mostly disappears at F2.0 and at F4.0 it gets very sharp across the image. It works great with Olympus IBIS cameras, but you…