Maybe the gurus here can help me out.
I don't have experience with either of these lenses but I am in the market for a lens in this focal range. The 2.8 of the 17-35 is obviously highly desirable, but it is an older model(10 years+) so I'm unsure of how reliable it would be if I got it, or if that's even such an issue? I also don't know which lens is sharper as I can't find any image samples or galleries of the 17-35 to compare to the 17-40. I've tried searching but nothing relating to the 17-35 comes up.
Anyways advice/suggestions/insight is welcomed, thanks.