Which is better to go to Tibet 17-40 or 24-70?

According to Software.com's inquiry, 17-40 lens belongs to Canon's wide-angle lens. This lens is only suitable for shooting landscapes, not portraits and small objects. According to the query of Zhongguancun online website, 24-70 is the most commonly used lens type in ternary system, which can realize wide-angle shooting, portrait shooting, scenery shooting and street shooting. It can be seen that the function of 24-70 is more comprehensive, so it is better to take 24-70 to Tibet.

24-70 The outer surfaces of the lenses at the front and rear ends of this lens are coated with antifouling fluorine films, which have excellent oil and water repellency, showing that the antifouling ability is very strong. With an aperture of F2.8, the focusing range is 24-70mm, the nearest focusing distance is 38cm, and the magnification is 0.2 1.