OK...this is funny...4 posts back on the rumor homepage is the canon 24-105mm alert for $639... That is quite a bit cheaper...plus the Canon has IS. I am a little slow on the uptake sometimes...but the Sigma has no IS...correct?
I owned the Canon and it is a very decent Zoom lens ...especially at $639!...
I am A Sigma Fan...own the new 35mm....but I am wondering if this lens really best the IQ on the Canon "significantly" asit will have to to sell well, right?
A couple of things.
1) As mentioned previously, Sigma have their own equivalent of Canon's "IS".
2) The 24-105Ls that are selling for $639 are lenses that have been pulled from kits - they're not standalone lenses. Here is the standalone version of the lens priced at $1149 at B&H:
If you look at this page:
Then the Sigma lens is $250 cheaper.
3) If the MTF graphs are anything to by then yes, this lens will easily surpass the current Canon version.