It depends on the landscape. And the farther you are from it, the bigger lens you need(+mm). But thats not a goal, Get as close to the object as you think you should be, then get closer. You'll need a wider lens. A 18 - 28mm ( not zoom, no zooms are good. ) is good to have. A 45mm is always a friend. A 135mm, to tell what will fit in its frame, hold out your hand at arms length, palm/hand flat facing you. what that covers is what will make the shot.