How many seconds would you like? For true Raw it would be 40Mpix×10bitx60Hz. That's 3GB/sec which greatly exceeds the imager transport speed. Even 4k@30Hz 10bi

How many seconds would you like? For true Raw it would be 40Mpix×10bitx60Hz. That's 3GB/sec which greatly exceeds the imager transport speed. Even 4k@30Hz 10bit RGB Raw would be ~900MB/sec depending on how they down-sample Bayer, which is several times the imager transport limit (2-5Gb?). Even the highest speed SD cards can barely do 100MB/sec write speeds (edit: some can now do 250MB/sec but they are only 64GB) so you would need a DDR-DRAM buffer for as much as you wanted to store. 32GB would give you ~30sec burst, and you could get 4 bursts separated by 5min on a 128GB card, but your battery wouldn't last long. Really high dynamic range M-JPEG would be reasonable unless you're trying to resolve the noise in your CIS.