Trivia
The idea of a camera absorbing ghosts is based on a superstition that having your picture taken steals your soul and the only way it can be returned is to burn the film. There are followers of religions around today that believe this to be true including places in Mexico. The ghosts you encounter are all lost souls.
The original Japanese title Rei: Beni Chou means "Zero: Crimson Butterfly". The PAL release title is actually closer to the original than the NTSC one.