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Capturing your underwater adventures on film. The most dramatic way to communicate to the air-breathing world your close encounters with charismatic megafauna such as sharks is to photograph them. You don't want to be futzing with the focus when you're worrying about the sharks. The MX-10 works at depths of up to 150 feet. As for film, Wu says that 100 ASA color-print film is far more forgiving than slide film.