In cinematography , full frame refers to the use of the full movie gate at maximum width and height for 35mm film cameras . It is sometimes referred to as silent aperture , full gate , or a number of other similar word combinations. It is the original gate size pioneered by William Dickson and Thomas Edison in 1892 and first used in the short movie Blacksmithing Scene . 

Full frame is used by all 4-perf films, whether silent, standard 35 ( Academy ratio width), or Super 35 gold . ^{[citation needed ]}The introduction of the Academy ratio in 1932 required that thelens mountneeded to be shifted slightly to the center of the frame; However, the gate size did not change the extra negative information that would be produced by post-production processes. 4-perf Super 35 is nearly identical to the original full frame standard, but the lens mount requires vertical re-centering when common topline extraction is used. Hard matte for all common ratios exist and replace the film gate itself. However, these are usually not used in the event that anyreframingneeds to be done.