The focal length you need depends on how far you are from the scene — 2000mm is a bit much on a 35mm film. In this situation, 400mm was appropriate, moving the camera laterally and vertically to avoid distortion. Or as baachitraka said, shoot a small area of a big photo.
The "imperfect" has been done. It's easier, less methodical, and not as "crazily obsessed". The actual title of the piece is 1 kilopixel, take from it as you will, but one of the layers I wanted to incorporate into the piece was this modern obsession with digital pixel peepers and their quest for perfection.