Although I've owned the Batis 85 for many years, I've never tested the limits of the optical image stabilizer. However, I find it amazing that I was able to take a sharp portrait at 1/50 second with 42 MP in the images above in my post. There was a window and a wall behind me, so I couldn't step back very far to create some distance from the subject. I held the camera against the wall behind me and took the picture using the LCD screen. My grip on the camera wasn't particularly stable in that position. Nevertheless, many of the images were very sharp. With the Batis 40/2, which doesn't have optical image stabilization, I never use a shutter speed slower than 1/60 second.