Just received my brand new 50-230 and I'm questioning whether or not OIS is even working. I have the menu set to #2 Shooting Only, but the image in the EVF is always wiggling when shooting off hand. With my Olympus bodies the image always near freezes with half push on shutter button. The images I'm getting at 230 / f8 / 1/250 are a bit blurry off hand, but are very clear when using a more solid rest. Any other test I can make to verify OIS is working properly?