which lens will work best with the 40D. I can't seem to decide between the 2. I do like the wideness the 17 will provide but the future upgrade to the full frame of the 24-105 is also a plus point. The reach of the 105 on a crop body is a plus. I do use my whole focal length when I shoot.
The F4 vs 2.8 isn't that big of an issue as i can hold my hand pretty steady to use the F4 w/ IS to get a shot.
if you own both, i'd love to see shots taken at F4 for both lenses and similar Focal Length.
24-105L IS
