Have you guys seen the MTF charts on this baby? Jeez....it looks incredible.
I actually think that R & D considered IS for this lens, but decided it would degrade IQ just a smidgeon.
And let's face it: this thing will be on a tripod for many pros anyway. If i actually needed that FL it would be on my short list. I would probably even part with my 35L to get it....if I needed the 24-70. It looks to be THAT GOOD!!