I don't have a 24-105L in hand now but as I remember, the 24-105 still come worse than the 24-70 on cropped bodies, so yes, likely you will notice distortion since I see slight distortion on my 24-70L through the 50D. Frankly, I have not bee touching a 24-105L lens for years, my short experience with it was back in 2006... You can easily check it out at a camera store, and that way you will be convinced.


Yes, you can say that. F2.8 is just about the only advantage remaining for the 24-70L apart from the distortion. In fact, I think the f2.8 is the only valuable thing to me as I shoot a lot of portrait and indoor stuff. Distortion is something that can be easily corrected by software, but creamier bokeh cannot be simulated at all. Both lenses have similar sharpness and contrast, see Bryan's review and the testing charts. I would say if you don't need a F2.8 (you probably don't since you have the primes[]), go for the 24-105L. It's a nice walk-around lens overall, plus, IS will help a lot as I know how tough life can become with my non-IS 24-70.


PS: Bryan seems to like the 24-105L a lot.