ST 419:2005 : For Motion-Picture Film (70-mm) — Projectable Image Area, 15/70 Format
The Society of Motion Picture and Television Engineers eBooks · 2005
This standard specifies the dimensions of the film image area intended for projection from a 15/70 special-venue motion-picture film, the placement of this area relative to the perforations and the reference edge of the film, and the location of pins used for registration during projection.