Institute of Electrical and Electronics Engineers (IEEE)
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SMPTE ST 420:2005
Scope
This standard specifies the maximum dimensions of the film image area intended for projection from an 8/70 special-venue motion-picture film, and the placement of this area relative to the perforations and the reference edge of the film.
SMPTE ST 420:2005 history
2005SMPTE ST 420:2005 ST 420:2005 - SMPTE Standard - Motion-Picture Film 70-mm — Projectable Image Area, 8/70 Format