Cinématographie — Surface d'image 8 mm type S produite par tirage sur film cinématographique 35 mm perforé 8 mm type S, 2R-4,227 (1664) ou 5R-4,234 (1667) — Position et dimensions

The dimensions which define the image area are established from the row of perforations discarded after slitting. This row contains a wider perforation and is customarily used for lateral resgistration of the image. Annex A describes the use of a registration device for prints made with a step printer.