>>3398345A full frame sensor is 36x24mm, or 864mm2
So, the image circle has to be at least wide enough to fill the rectangle
so, we calculate the radius of the circle as √ (182 x 122) = √ (324 + 144) = √(468) = 21.64mm.
This shows us the area of the whole image circle is 1,471mm2. So by using the full frame sensor we’re not even close to getting the full image that the lens projects, we’re throwing away 41% of it.
If it wouldn't be for the existing ecosystem it would totally made sense.
But then I'm thinking that wafer space in the corners may not need to be wasted - maybe there is the opportunity to use that space for some of the support circuitry for the sensor seeing as that is fabricated using the same processes as the CMOS sensor.