Everything is framed in large rectangular blocks — with different aspect ratios for different time periods — and even the camera seems only to move at perfect 90 - degree angles. (combustiblecelluloid.com)
But I was asking about different aspect ratios, for a given total diameter, therefore variable rim diameter. (mechanics.stackexchange.com)
These future phones will have a completely different aspect ratio because of the foldable design. (nashvillechatterclass.com)