Quote Originally Posted by Anbesol
Replace the word 'helpful' with 'effective' then, helpful wasn't the right word.
Like OldClicker, I too was a bit confused by what you initially stated. Even if you said, "I wasn't saying IS was useless at telephoto ranges, just not as 'effective'", it still might not be clear to others. But I think what you mean is that, at the same low shutter speed, the IS will help remove the effect of camera shake more with shorter focal length lenses?

But since telephotos magnify everything, it is unreasonable to use the same shutter speed analogy at increasing focal lengths. So longer telephotos, in addition to requiring higher shutter speeds, do indeed benefit greatly with IS technology.


As for the IS experiment, I will do this in the spring. It won't apply directly for in-camera systems, but it is something I'm curious about.