yes, it looks like it might be, most of the pics above are using my 17-55 or 70-200L i think.
the 24-70 seems to be slightly out of focus on some shots, its just not there, i took the same shots with both and the 17-55 were definitely way more in focus.
not sure whether its back focusing? i don't really know how to solve it using the 50d though, its not straight forward adjusting the lens in there, have tried it before.
It's not the 'ring is it....?
It's not the 'ring is it....?
10 points!