A Comparison of Overheating in the Canon R5 and Sony a7S III

The Canon EOS R5, R6, and Sony a7S III are new to the scene and have generated a lot of buzz, but there have also been concerns about overheating issues, particularly with the Canon cameras. This great video compares the EOS R5 to the a7S III when it comes to overheating and shows what you can expect in real-world usage. 

Coming to you from Dan Watson, this helpful video compares the Canon EOS R5 to the Sony a7S III when it comes to overheating. There has been quite a bit of concern about this issue with Canon's new cameras, but it turns out that the issue is not that clear cut. Surprisingly, while Sony outperforms the Canon indoors, things change a bit outside, with the R5 actually managing to outperform the Sony in the sun. Some third party solutions have started to emerge, as well as a patent by Canon that shows an EF-to-RF adapter with a built-in cooling system, but for the time being, it is important for any filmmakers or videographers to carefully evaluate their workflow and needs when considering which camera to purchase. Check out the video above for Watson's full thoughts. 

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Alex Yakimov's picture

Thanks. 0:18-0:21 clearly shows the difference in image stab between R5 and a7s3.

Alexander Petrenko's picture

We just don’t know if Steady Shot was on or off. Which should also be considered in the tests.

Alex Yakimov's picture

it was on, but regular one. there is a whole episode by the same author...

Lee Christiansen's picture

A well reasoned explanation of real world results. And of course if folks want a fully featured video camera that will shoot all day in any condition... Canon or Sony make video cameras too... :)

Alexander Petrenko's picture

With 27 minutes in direct sun you’ll probably loose me first, then Sony, then Canon.

Thomas H's picture

So the "non overheat Sony" overheats after all ! One have to wonder about the successful PR of the Sony, how they manage to lure so many people into their camp by these claims.

Pieter Batenburg's picture

Really dude, get a life and get over it.


Sony campaign was aimed directly at Kasey(sic?) from camera conspiracies.

First they force him into an NDA without giving him a camera.
Then everyone posts reviews saying it is the perfect camera.

They will keep that camera away from him so he does not discover it is not a perfect camera.

Jose Soriano's picture

I don't understand why people complain about this overheating. Unless you shoot sport at 60 fps there is no way you shoot 30 min in 40k 60p. These are hybrid cameras, when you film the takes are not that long so. Stop complaining about stupid things. Start making content and worry less about the technology

Black Z Eddie .'s picture

Of course there are those that may want to shoot 4k 60p 30 mins or longer. Just the ones at top of my head:

1. Weddings/Events
2. Interviews
3. Documentaries

For the most part, once you go for that 60 fps look, you'll have to stick to it.

Alexander Petrenko's picture

Please, don’t do that under direct sunlight without sunscreen applied.

Daniel Lee's picture

This was a great comparison by Dan Watson. I'd love to see a weather sealing test of the two now that Canon has DSLR level weather season on the R bodies.