What is the speed of the CSI interface and cable? I'm looking for an answer that is in either x kb/sec or x secs/picture.
petervis.com suggests a practical limit of 2Gbps:
The Raspberry Pi CSI connector is a surface mount ZIF 15 socket, used for interfacing a camera through a ribbon cable. The CSI-2 specifications are very detailed and describe the physical layer known as D-PHY2. The signalling scheme of this physical layer, known as Low Voltage Differential Signalling (SubLVDS), is a modified version of the IEEE1596.3 LVDS specification. It is a system for low voltage 1.2 V applications, allowing data rates of up to 800 Mbps per lane with 1 Gbps set as a practical limit. In practice, the data rate can vary a lot and depends upon the quality of the interconnections. A maximum of four physical data lanes are allowable in this specification, however two are available for the Raspberry Pi