I chose between 17-40 and 16-35. I chose 17-40, because. I didn’t want to overpay 20,000 for aperture ratio. I bought a tripod for night shooting and do not experience any inconvenience. Moreover, the diameter for a 77 mm light filter is more common and it is easier to get filters than for 82 mm. I advise everyone who is fond of landscapes, on the crop - an excellent staffer.