Good question. I'm referring to landscapes in which I'm shooting a lot of bracketed images for HDRs. I feel a tripod is mandatory. (For example a shaded waterfall with a brilliant sky). On a single hike, I can encounter subjects that require a telephoto (100-400 mm), or midrange (24-105 mm) or extreme wide angle (14 mm). I could probably hand-hold these lenses if it were not for the need for bracketing. Even without a tripod, carrying multiple bodies (in a convenient and comfortable and secure system) would make life easier!