Quote Originally Posted by neuroanatomist
As IS noise on high-end lenses goes, the 100mm L is pretty quiet.

Mine seems louder to me than the 24-105 f/4 (maybe, as you said, because it is slower). It's also louder than the 70-200 f/2.8 ii, but hey. That thing is very quiet.


I think the 100 IS is quieter than the 70-200 f/2.8 mark i.