> > I'm sorry if this question has been asked before in this mailing list.
>Since
> > I don't have any IS lenses, I'm curious whether an IS lens would be 
>slower
> > than a similar lens without it? E.g., would the EF 70-200/2.8 IS L be
>slower
> > than the old Canon 70-200/2.8 L because the IS technology adds more time
> > when focusing or taking the picture? Bare with me please :-)


Actually it could even be that IS makes the focusing faster because
the image doesn't shake as much as without IS. If it doesn't help
the AF system then at least *you* are able to keep the AF sensor
easier in the point you want to be in focus.

Vesa


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