Quote Originally Posted by AgX View Post
There are several perforations used in the 35mm cine world. And two types of holes. But the difference is not due to the speed of film as for instance the film speed is basically the same in the camera and in the projector. The reason for one part are other technical factors and, probably more important, to many people gathering at too many conferences...
Ah I always thought the rounded sprocket pattern was a necessity because of the rate of speed the film passes though the camera/projector, so that they engage the teeth properly without tearing.