Here we have our first teardown of the Canon EOS R5, and it will give you some idea in how Canon has chosen to control heat. There are a few design choices that I find interesting.
- The thermal pads on the CPU don't cover the full CPU
- Aluminum was used instead of copper, though there is added cost and complexity of working with copper.
- There is definitely no venting for heat to escape
- Is there an issue with the CFExpress slot being so close to the processor?
As pointed out by EOSHD, why does not of this matter when recording externally? I and others think it's probably some kind of software limit.
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If not it's just some careless coding by Canon where they're detecting card present for cutoff limits rather than card is set for recording.
better to add a fan
As for making assumptions on the teardown and materials of R5? Are any of these talking heads or random people with angry opinions (because they can't buy a cinema camera for $4000) actually electronics engineers or have ever done a thermal analysis? If so, I expect more rigor than they are presenting. I have plenty of knowledge in this area and will leave it at that, but I'm not here making speculations despite my knowledge. Unless I know the power dissipation of all components in all modes, the thermal resistivity in each material, and run a 3D thermal analysis myself, I know better than to guess. There is no point acting like we know what the problem fully is. Sure, testing might yield some results, but people acting like Canon are idiots are being unfair....The assumption that armchair engineering is better than a dedicated team that cares about the product at Canon is ridiculous.
Regarding calling for legal action because people cannot read a spec sheet? Good luck in court with that weak argument and your 'righteous' anger. Pretty hard to make a legal case when you were told prior to purchase there are limits with the camera video modes, and that other camera activity could also downgrade the recording time.
Yes, if all you care about is a dedicated video camera that does all this incredible footage in a tiny MILC body, it is not for you, grab a Sony and enjoy life and 12MP stills. You are also unrealistic for thinking a full frame high MP camera with IBIS in a weather sealed body would NOT have some heat issues doing all that. As the mirrorless 5D5 this camera delivers incredible stills and light duty video. I'm having a blast with it and already producing great images.
Certain people always focus on the negative and are always victims no matter how much logic is applied.
Adding fan means you need more airflow room and vents in body for intake and exhausts in other words turn it into a cine cam and lose weather sealing. Canon make those already, problem solved. The better solution IMHO at the risk of sounding like Apple is make users realise they are expecting it to be something it isn't. It is a nice optional extra with limits made more severe so as not to harm the longevity or primary functions of niche it is aimed at (a stills cam that has amazing lightweight hybrid vid capabilities. Need primarily heavy lifting vid centric work get something else).
They were also told it could be used as a backup camera. Now maybe it's me but I can't imagine someone grabbing a camera that's been assigned a backup role and then running around and shooting a bunch of stills with it, so even the "it heats up shooting stills" complaint seems a bit off to me even though it's factual, because why would you be shooting stills with your backup camera anyway?
Of course when someone pointed out "backup camera" then the kvetching moved on to needing to footnote it.
These people are determined to whine and bitch about this thing because it is not something that it isn't and was never meant to be.
Brian
EOSHD author: "Canon promised us 8k video"
Judge: "Did they warn you about the heat limitations in an official press release?"
EOSHD author: "Yes and I blogged about it. So I bought one and complained to Canon."
Judge: "Did you buy one after you read the press release?"
EOSHD author: "Yes and I tried 8k video and it doesn't work when it's hot. I demand a recall"
Judge: ...
My theory is still that the temperature limit is there to protect the CFexpress card. Even if it's not being recorded to the internal temperature can be enough to corrupt data. There's so much processing going on in this small form factor.
Its why the atomos records to prores or whatever other codecs that comes with it. Because it is the EXTERNAL RECORDER DOING THE PROCESSING OF WHATEVER COMES OFF THE SENSOR. I thought this was basic knowledge for anyone intending to use the camera for videography.
Why then does the camera overheat faster with CF cards installed even externally? There could be a bug where the cf card continues to heatup even when not in use, just like how nvme ssds heat up sometimes even when you arent using them with your PCs. I believe canon COULD possibly fix this in firmware? Although im not 100% on whether this is possible since im not an expert. So perhaps Canonrumours could do without spreading misinformation if they dont even know why cameras dont overheat when recording externally?