With a crop body, the 16-35 is, for me, a useable walk-around lens for general purpose pictures. Wide to pretty normal. If I was going to upgrade to full frame later, when I did, I would pick up a 24-70 or 24-105 at the same time, because 16-35mm is entirely wide angle on a full frame camera, and unless i'm doing landscapes or other applications where I want the wide angle perspective, and can get close enough to subjects to actually put a bunch of them in the picture, I can't really see having it as my standard lens of choice. I've got a 16-35mm and a 24-105mm, and the 16-35mm gets use far less than the 24-105mm.


If you like wide shots on the whole, then you might get by sticking with a 16-35mm on a full frame, but if that was the case, you wouldn't even consider a 24-70 on a 1.6x body.