<Li> Television "action safe" area </Li> <Li> Television "title safe" area </Li> <P> Technical specifications for 35 mm film are standardized by SMPTE . </P> <Ul> <Li> 16 frames per foot (0.748 in (19 mm) per frame (long pitch)) </Li> <Li> 24 frames per second (fps); 90 feet (27 m) per minute . 1,000 feet (300 m) is about 11 minutes at 24 fps. (900 ft = 10 minutes) </Li> <Li> vertical pulldown </Li> <Li> 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 . </Li> </Ul>

Up until the 1950s the standard aspect ratio of most 35mm hollywood films was