Well you would need twice as many feet of film for 48fps, and it would need to be fed twice as fast, with light flickering twice as fast, etc. I assume that wasn't easy to do.
Film was shot at 24fps, a compromise between limiting motion effects while saving on film.
Each frame is actually projected twice in a film projector because you would see flicker at 24fps so the brightness/number of images is the same. It's just that at 48fps each is different
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If that's true, is there a technical reason that no one used different frame rates prior during the age of projected film? (for big budget movies)
Well you would need twice as many feet of film for 48fps, and it would need to be fed twice as fast, with light flickering twice as fast, etc. I assume that wasn't easy to do.
Film was shot at 24fps, a compromise between limiting motion effects while saving on film.
Each frame is actually projected twice in a film projector because you would see flicker at 24fps so the brightness/number of images is the same. It's just that at 48fps each is different