Read Roger's review here. I have to say, I'm impressed. My main lens is the original 24-70, and while it is not a perfect lens, it is a fine performer. But the new version looks like a world-beater... now if only it weren't north of $2k USD!
ETA:
This says it all:
Originally posted by LensRentals:
This is short, sweet, and simple. The resolution absolutely, positively kicks butt and takes names. It is way better than the lens it replaces. It’s better at 70mm than the best Canon zoom I know of, the 70-200 f/2.8 IS II. It’s even better at 24mm than the sharpest 24mm prime we have, the Canon 24 TS-E.
Ive got the original 28-70 2.8 l which is my main lens amazing but getting bit tired now, this looks amazing but might have to go 24-70 mk1 first local camera shop has one for £900 second hand.
The 82mm filter size is sorta frustrating, I imagine.
It sure is! But I think that's the price we pay for better corner performance. It seems like 82mm may be Canon's new "high end" filter standard. Sucks, because I hate to think about replacing my 77mm filters. Not that I have that many of them, but the ones I have weren't cheap, and 82mm is going to be *expensive* if I can even find it.
Ah well, that's all theory right now. First I have to replace the original 5D body, then I can think about lens upgrades. All that will be put off until the boy gets out of college, LOL.
