Journal of the Society of Motion Picture and Television Engineers (1950-1954)

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PROPOSED AMERICAN STANDARD 35mm Sound Motion-Picture FilmUsage in Camera (Second Draft) PH22.2 Revision of Z22.2-1946 Guided Edge Image-Forming Light Drawing shows film as seen from inside the camera looking toward the camera lens. 1. Position of the Emulsion 1.1 Except for special processes, the emulsion shall be toward the camera lens. 2. Rate of Exposure 2.1 The rate of exposure shall be 24 frames per second. 3. Relationship Between Sound and Picture 3.1 The apparatus and film shall be so arranged that the sound is placed on the film 20 frames, =b ]/2 frame, ahead of the horizontal centerline through the corresponding picture. Thus, a given point on the film shall pass the sound head after it has passed the picture aperture. NOT APPROVED 628 May 1953 Journal of the SMPTE Vol. 60