fahrenhyde: IS is one thing, but when I look at the lens I notice the sun shade is attached to the moving part of the lens, which means it doesn't give maximum protection against counter light in tele position. The sun shade actually moves with the lens, which, to me, makes the lens halfway useless.I really liked the system with the "old" 24-70. Though it makes the lens very fragile, I had to send it to repair 3 times already because the ring holding the lens hood would break.
Unless It moves the other way, like some lenses do. With the tele at the shortest length and wide at the longest..(?)!