It's so cool that you can do this! In the GameCube version, here's how you do it:
Step 1: Plug a controller into Port 4.
Step 2: Play the game.
Step 3: Hold L and R, and push down on the Control Stick a little way, until it's just before the screen starts rotating. (I hate that.)
Step 4: While it's in that position, unplug the controller in Port 4.
Voila: permanent zoom! It even stays that way when you leave the area! It doesn't stop until you quit the game, or you plug the controller back into Port 4.