- Sep 5, 2018
CFExpress currently come in 1GB/s, 2GB/s, and 4GB/s max theoretical speeds. Type A are sized with SD cards and should be happy at 1GB/s. The R5 seems to be getting the common type B card format which currently supports up to 2 GB/s. SD express and CFE Type A may end up being the same thing, but that is pure speculation on my part.I looked up the specs, UHS-II can theoretically go up to 312 MB/s (half duplex, i.e. read or write).
And back OT, the slow SD card is not a backup for some shooters but is perfectly fine for others. Something had to give on this camera, giving us 12/20 FPS was too good to be true for sports and wildlife. So for those disappointed in the SD slot like myself, I invite you to look forward to the R1 and whatever big whites will be launched with it.