Landscapes the 17-40 is fine at f-4. I borrowed a buddy's one time to shoot some interiors on my 1.6 crop. I shot everything on a tripod at long exposures. It is sharp. But for hand-held interiors, it isn't the best option.


If it is in you budget, go with the 16-35, you'll have the wider aperture and never need to upgrade.


But I think if you get the 17-40 I think you will be pleased with the image quality, you will just lose a stop with it.