SMPTE RP 53 – Scene-Change Methods for Printing 35-mm, 16-mm and 8-mm Type S Motion-Picture Film (R2003)
This practice specifies the dimensions and location of a scene-change notch or cueing spot for actuating the printer light-change mechanism when printing 35-mm, 16-mm, and 8-mm type S motion-picture films. (See annex A. 1 for a frame-count cueing method which is more commonly utilized). Although this practice specifies a notch or a cueing spot for actuating the printer light mechanism, at no time should a film contain both.
