If you're standing 100m from that fence and zoom in on it ("telephoto" in proper terms) you'll end up with a very different picture than if you're 2m away and u

If you're standing 100m from that fence and zoom in on it ("telephoto" in proper terms) you'll end up with a very different picture than if you're 2m away and using a normal or wide-angle lens. Kind of like holding your fingers in front of your eye and "crushing" people's heads.