Canon EF 300mm f/2.8L IS II USM
Most people tend to think of image stabilization as being mainly for telephoto lenses. While it's true that their longer focal lengths tend to magnify the effects of camera shake, image stabilization can provde a very useful assist at wider angle focal lengths as well; anyone who's ever tried to blur the image of a waterfall, while keeping the surrounding landsape tack-sharp knows exactly what I'm talking about.
On par with its marketing materials, the Canon 300mm ƒ/2.8L IS II USM produced a solid four stops of image stabilization, including a reasonable number of sharp shots with IS on at 1/15 second; this is amazing performance, when you consider the lens you're hand-holding weighs over five pounds.
|Mouse over this chart to show results with IS activated.|
IS systems tend to provide more benefit to less-stable shooters than very steady ones, so most users will see the same or greater amounts of shake reduction as we measured here. You can read more about our IS test methodology here: SLRgear IS Test Methodology, v2.