Quote Originally Posted by Keith B


I also get a little tripped out when the IS enables (noise, vibrations) especially in the 100-400 so I don't like to have it on when I don't absolutely need it.
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Ahh, feel the same actually. The only IS lens I have is the 70-200/4L IS. Because I use film, it usually takes me time to compose or just lookinginto the view finder for quite some timebefore actually taking a picture. When IS's switching on and off frequently I do feel disturbing a bit. So when I need time tocompose and focusI just turn off the IS, and when I'm shooting I'll put it on, no matter what speed I'm using. The image shake is not that bad at 200mm, but I can imagine it will be hard to handle when it's 400mm...


It will be hard to live w/o IS for the 70-200mm, the 24-105L should still be reasonably handy.