Regularly and accurately spaced holes punched throughout the length of film for still cameras. Basically the perforation function as a guide for precision registration of film and also provide mechanical movement from frame to frame. Found on http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl
Regularly and accurately spaced holes punched throughout the length of film for still cameras. Basically the perforation function as a guide for precision registration of film and also provide mechanical movement from frame to frame.