This photographer normally uses a 5D and 1D for his motocross events and was able to use an R5 under similar conditions yesterday.  So it is possible to overheat the R5 taking only photos. https://www.canonrumors.com/forum/threads/gerald-undone-completes-exhaustive-record-time-testing-on-the-canon-eos-r5-and-canon-eos-r6.38979/page-4#post-851397 "I got to use an r5 today out at a Motocross event and well it turned off from only doing photos. This was using the ef to rf adapter and a 20