I have the 100-400mm....at 400mm you need IS at 200mm you don't. And f/4 IS isn't going to get you night sports.
i think a lot of guys would disagree with your take on IS. i know i disagree with you.
or else canon has committed a serious blunder by making the 17-55, 17-85, 28-135, 24-105L, 70-200L f2.8 and f4 IS, which are some of canon's best selling lenses.
and who shoots night sports? because you do you assume i do?
i bought this lens because it was exactly what i wanted and i paid cold, hard cash
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ed rader
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