(0.1870 in). While cellulose nitrate and cellulose diacetate stocks used to shrink during processing slightly enough to have this difference naturally occur, modern safety stocks do not shrink at the same rate, and therefore negative (and some intermediate) stocks are perforated at a pitch of 0.2% shorter than print stock. Technical specifications Technical specifications for 35 mm film are standardized by SMPTE. 16 frames per foot ( per frame (long pitch)) 24 frames per second (fps); per minute. is about 11 minutes at 24 fps. vertical pulldown 4 perforations per frame (all projection and most origination except 3-perf). 1 perforation = in or 0.1875 in. 1 frame = in or 0.75 in. 35 mm spherical Aspect ratio: 1.375:1 on camera aperture; 1.85:1 and 1.6:1 are hard- or soft-matted over this Camera aperture: Projector aperture (full 1.375:1): Projector aperture (1.6:1): Projector aperture (1.85:1): TV station aperture: TV transmission: TV safe action: ; corner radii: TV safe titles: ; corner radii: Super 35 mm film Aspect ratio: 1.3:1 on 4-perf camera aperture Camera aperture (4-perf): Picture used (35 mm anamorphic): Picture used (70 mm blowup): Picture used (35 mm flat 1.85): 35 mm anamorphic Aspect ratio: 2.39:1, in a 1.19:1 frame with a 2x horizontal anamorphosis Camera aperture: Projector aperture: See also History of the art and technique of making films Original camera negative List of motion picture film formats List of motion picture film stocks Footnotes References External links American Widescreen Museum Fujifilm Motion Picture Films Kodak: Cinematography List of venues and organizations currently running motion picture film Film and video technology Film formats Motion picture film formats Thomas Edison