Just picked up a 300 f/4 Pro from a forum member. I also just picked up an E-M1 III from another member. I'm on backorder for an OM-1 kit so learning the Mk III (was an olympus shooter years ago). I went out in my back yard in the waning light and shot these at ISO 2000 to 3200. I'm very happy with the lens (I had one once before as well).