John.B
macrumors 601
Sorry, I misread 1:4 as 1.4.no I was 100% certain this was a F/4 Zoom lens , its F/4 all the way though,
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=149&modelid=11924
its that one, I don't get the price... 😱
That is actually a very nice lens, one I'd love to have (and will probably buy with my 5DMk3 when it comes out, or whatever other FF I eventually settle on).
The 24-70mm f/2.8 is obviously one stop better in low light (which shouldn't be underestimated, one stop is twice as much light). And they don't call that one "the brick" for nothin'... 😉
But the 24-105mm f/4 is extremely handhold-able with three actual real-world stops of IS; as long as you have some degree of sufficient light the 24-105mm is much more versatile as a walk-around lens with a FF camera.
Personally I don't think it would be wide enough for general use on my 50D (or pre-ordered 7D), but that mostly has to do with they type of pictures I "see"; I'm either shooting macro or at the wide end and tend not to shoot much in between. YMMV.