Super 8 Lenses
5.69 x 4.22 mm image area · 1 interactive lens diagram
Super-8 motion-picture cameras | 5.69 × 4.22 mm reference gate; 7.08 mm minimum coverage diagonal
Schneider's historical Variogon publication specifies a 5.69 × 4.22 mm Super-8 frame. US 3,442,573 also explicitly describes full illumination of this frame. Its 7.08 mm diagonal is a minimum frame-coverage reference; it does not certify a larger usable circle or a particular reconstruction's corner performance.