Here’s a bigger version of the OS-active waterfall shot we showed above. As you can see, the water has very nice flowing motion, and the stationary edges in the frame are perfectly sharp. This was made handheld at 1/10 second, ISO 100, f18 at 28mm. Yes, the top spill is a bit askew from frame edge, but that’seasy enough to fix in any basic image editor. We’re about a stop-and-a-half below the 1/x focal length rule here. Note that with zoom lenses, the 1/x rule for OS and shutter speed relates to the current focal length!