Well, Kolari Vision might’ve been the first to tear apart the Canon EOS R6 and get a good look at the chip that seems to keep time for “overheating” issues, but it looks like Roger and the gang at Lensrentals has beaten them to the punch on cracking open the Canon EOS R5.
They’ve published a complete EOS R5 teardown which offers some good insights into its weather sealing, which looks very impressive. But those seals might be the EOS R5’s downfall when it comes to letting heat escape.
The one think you immediately notice with the EOS R5 is the substantial amount of rubber grip around almost the entire camera that needs to come off before you can access pretty much any screws to open things up.
All this rubber might be a pain to get off, but it’s certainly going to help increase the weather sealing of the camera. Once inside, a lot of small rubber gaskets and seals around various plates and holes show quite the attention to detail when it comes to keeping things as tight as possible. Unfortunately, all this sealing to keep water out also potentially keeps all the warm air in.
All I can think of is, ‘how does the heat get out of the camera?’ Sure it goes into the metal sinks, but once they heat up, then where? In a small photo camera, there’s not a lot of ventilation/convection current to get let the heat out. This camera is better sealed than most; I doubt there’s very much ventilation at all.
Somebody should look into that.
Beyond that, though, Roger speculates little on the heat dispersion capabilities of the EOS R5. As he mentions, he’s not a thermal engineer, and a lot of things he’s speculated on in the past haven’t turned out to be quite as accurate as he thought. But there do seem to be heatsinks-a-plenty throughout the camera. It appears to be very tightly packed with very little airspace inside the unit at all.
One thing Roger is confident in, though, is the warning he offers about the little battery door switch that people have been shoving things into, stating that it is delicate and easy to dislodge. It’s only held on by solder, directly to the motherboard, and damaging it can require a complete mainboard replacement (which isn’t a cheap option at all).
Overall, though, it seems to be a pretty solid camera, although the things that make certain aspects of it so great could be the very things that cause other aspects to be… well, not so great.