35mm stills cameras normally use a 3:2 frame. Television shot on film typically used movie cameras that shot at 1.85:1 and then cropped to 4:3.

But different shows handled the aspect ratios differently in their widescreen re-releases. Seinfeld included slightly more horizontally than the original TV release but still cropped a significant amount from the top and bottom. That 70s Show as one example that was also shot on 35mm film included the whole original 4:3 frame plus extra on the sides.

Could it matter that movie cameras use the same film but vertically? I'd be more inclined to stretch frames horizontally if I was designing a cinema camera, because that means the film run slower.

> 35mm stills cameras normally use a 3:2 frame

Ah, indeed, I seem to be forgetting the days of film photography.