I'm going to be in the market for a lens shortly, and am doing the research on them now. I am going to be doing Architectural Photography. I have a TS-E 24mm, also, and am shooting with a 50D, but will be going full frame within the year (5D mk2).
I've been set on the 17-40 if I couldn't get to the 16-35. But in my research, I found the 17-35 f/2.8, which can be had used for roughly the same range as the 17-40 is new. It doesn't seem to get mentioned much on this forum, so I wonder if anyone has experience with them.
Is it worth it to get the older 17-35(used) over the 17-40(new)?