>>3805985I don't know why people get this idea.
A curved sensor is like glueing the back half of a *specific* lens into the camera mount.
Does this mean *that* specific lens now is half the size? Sure. Cause you need only half of it to complete the optical formula.
Does it mean other lenses will be smaller?
No. the ones whose optical design was convergent to the thing you glued on the camera, will be smaller. All the rest whose optical design is divergent from the thing you glued on the camera, will be *larger* because they'll need to have all the corrective elements as they normally do *on top* of extra correction to cancel out what you have glued on the sensor.
On average it seems to be no benefit really, barring a fixed lens camera.
Such a thing has been tried, with the interchangeable lens Kodak Retina. Similar motivation: let's built half of the lens (and lens shutter) into the camera, so we can save on smaller, cheaper lenses that will need fewer elements. Great idea for the normal lens, but everything else was huge and slow.
In the curved sensor case, not all lenses have the same field curvature. Far from it. Not just different curvatures, but even different *signs* of the curvature, i.e. one could be spherical curvature, the other hyperbolic.
I'd still like to see it in a fixed lens camera though.
