Do you mean the film Psycho by Alfred Hitchcock? There were 70 to 77 camera angles used for the shower scene (depending on how you qualify the angle cut - there are 50 cuts for the scene itself); the set was constructed so that any of its walls could be removed, allowing the camera to get in close from every angle.

However, I could not find explicit fact on the shower scenes camera and lens used, it seems nearly the whole film was shot with 50 mm lenses on 35 mm cameras, so that would be most likely.

Is this the information you were looking for?
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