The newly published (March 19) US patent “20150077619” describes what will likely become the first Curved Sensor Full Frame camera (probably the RX2). That’s what Sony writes:
Patent Background:
“In recent years, the need for brightness of a shooting lens and an increase in the size of an imaging element which is effective in implementing low-noise shooting and a high dynamic range has increased, not to mention the need for an increase in image quality, a reduction in size, and a reduction in thickness.“
Patent Summary:
“The present technology is made to solve the above-mentioned problems, and it is desirable to provide a lens optical unit and an imaging device, which are capable of implementing high optical performance by performing size reduction and sufficient field curvature correction.
An imaging plane of the solid-state image sensor has a non-planar shape that causes a sag amount in an optical axis direction to increase as a distance from an optical axis increases, and a conditional expression (1) is satisfied (1) ρ×Sag>0, where ρ represents a Petzval curvature of an optical unit represented by“
SAR resume: The patent says “non-planar” (curved) sensor allow lenses to be more compact compared to lenses designed for “planar” (flat) sensors. And they actually share full specs of those lenses
Full Frame lenses (RX2?):
29.96mm f/2.06 (likely to become a 30mm f/2.0)
36mm f/1.85 (likely to become a 35mm f/1.8)
36mm f/2.85 (likely to become a 35mm f/2.8)
36mm f/2.26 (likely to become a 35mm f/2.0)
For smaller sensors (1 inch RX100m4?):
10,79-25mm f/2.8-5.4