R6 (and maybe R5) overheating issue

Jared5 wrote in post #19124634
My understanding is that with mirrorless bodies the camera is essentially in Live View whenever it's powered on. I configured the EOS R5 (like I did with the EOS R) to allow me to MANUALLY switch between EVF and LCD because I don't want the uncertainty of the camera doing it without me telling it to. I posted more info about this EVF/LCD switching here: https://photography-on-the.net …showthread.php?​p=19124630

To answer your question more directly, I was constantly in EVF mode. I only turned the LCD screen on once when I wanted to review an image for a subject who was seated (I didn't want them to get up and look at the laptop yet). Other than that the LCD was off the entire time and I was only using the EVF.

Could it be because the EVF uses more battery power than the LCD?
Could it be because I have the highest quality setting selected for the EVF?

I suspect those contribute toward it but not sure why I got the temperature warning icon in only 30 minutes, and even with the new firmware.
Maybe tethered shooting causes the EVF to stay on continuously and that contributed to the rapid heating.

I'll keep testing and see what I come up with. I'm still happy I have the EOS R5 bodies and don't have any regrets. I find some of this stuff really quirky but that's the price of being an early adopter. Other than making sure I have enough batteries (and I have plenty of the new batteries), I don't feel uncertain of the reliability of the EOS R5 and wouldn't hesitate to use it on any job I would have taken my 5D Mk4 on (as long as I have enough batteries).

Man from what Im reading, It looks like a battery for every 2 hours of shooting for wedding use. 5 batteries for each camera for a 10 hour wedding ?? Sound about right....Thank god 5D4 batteries can be used....still its going to be a PITA to walk in with 14 batteries to cover a wedding.....I go through 2 on my 1Dx2 and often times i will be on #3 at the end of a night at the reception

Still sitting back and watching all the develop. I have none of these issues with the 5D4 and 1Dx2...None

Currently I assigned the REC button to flip back and forth between the EVF and Display. I prefer the M-Fn button but I’m using it for C1-3 modes. The light and lock buttons are there but they are smaller. One day we will get to voice command.

davesrose wrote in post #19124754
I suspect the R6 can still overheat due to also having cramped electronics. But it would seem that utilizing 8K with the R5 could be more significant: requiring 4x the bandwith as 4K should have some noticible increase in power load. There would also be more processing with bursts at 45MP vs 20MP.

You don't need 8K to overheat the R5 or R6. Even some 4K modes will. Just using the camera for stills overheats. The processor and ram gets VERY hot per the teardown from Lensrental. Eye AF and deep learning takes alot of HP.

umphotography wrote in post #19124798
Man from what Im reading, It looks like a battery for every 2 hours of shooting for wedding use. 5 batteries for each camera for a 10 hour wedding ?? Sound about right....Thank god 5D4 batteries can be used....still its going to be a PITA to walk in with 14 batteries to cover a wedding.....I go through 2 on my 1Dx2 and often times i will be on #3 at the end of a night at the reception

Still sitting back and watching all the develop. I have none of these issues with the 5D4 and 1Dx2...None

The new battery lasts substantially longer than the older ones for some odd reason. I don't know the mojo behind it, but others have stated it, and I just went through a cycle of each, and the new battery outlasted my old LP-E6 by what seemed to be twice. That cannot be, because that would be illogical knowing the specs of the batteries, I suspect I was in the menus less the 2nd round as I already had things mostly configured, so this "test" is anecdotal at best.

digital paradise wrote in post #19124805
Currently I assigned the REC button to flip back and forth between the EVF and Display. I prefer the M-Fn button but I’m using it for C1-3 modes. The light and lock buttons are there but they are smaller. One day we will get to voice command.

I used to, but then that messes up my video mode, record is record period, and you have no way to flip displays without going to the hard menu option to do it.

So I changed to DOF preview for that and instead put an option on the record button to swap AI Servo vs One Shot. Only good for stills, so when I go to video, I don't have any worries.

TeamSpeed wrote in post #19124945
You don't need 8K to overheat the R5 or R6. Even some 4K modes will. Just using the camera for stills overheats. The processor and ram gets VERY hot per the teardown from Lensrental. Eye AF and deep learning takes alot of HP.

Deep learning is more on the software development side of creating an ongoing library of useful datasets. My point about 8K taking up even more bandwidth then stills or 4K modes is that it heats the RAM and processor that much more (and is drawing a larger power load). I'm not dismissing the fact that both the R5 and R6 can get hot and reach overheat warnings: and that the cramped nature of case design of both are contributing factors. Just that pushing the extra data for 8K does get the R5 to shutdown: it contributes more than a "bit", and can be more of a significant factor of whether casings are metal or polycarbonates can dissipate heat (more heat being produced than what can be dissipated in other words).

davesrose wrote in post #19124983
Deep learning is more on the software development side of creating an ongoing library of useful datasets. My point about 8K taking up even more bandwidth then stills or 4K modes is that it heats the RAM and processor that much more (and is drawing a larger power load). I'm not dismissing the fact that both the R5 and R6 can get hot and reach overheat warnings: and that the cramped nature of case design of both are contributing factors. Just that pushing the extra data for 8K does get the R5 to shutdown: it contributes more than a "bit", and can be more of a significant factor of whether casings are metal or polycarbonates can dissipate heat (more heat being produced than what can be dissipated in other words).

Yes, but the camera has to run what it sees realtime past the tables which is likely causing alot of paging within the system. If you shoot no video at all, the cameras still overheat with extensive use. The latest firmware has reduced that quite a bit by probably doing two things (raising the temp ceilings and sampling the 3 heat sensors more often), but still there isn't just a single cause of the overheating. The entire system runs hot even when it is turned on and doing nothing.

My point is that eye af and hitting all those truth tables would likely cause RAM usage too for paging in and out of all the data, IBIS adds heat, the rear LCD and EVF creates heat, the sensor just sitting there and not being read off will heat up, etc. All of this has been shown to be the case with the latest tear down videos and subsequent tests with a FLIR camera after different operations.

The issue is how sealed the body is now, it is probably one of the BEST sealed bodies, even compared to a 1D, coupled with being packed with so much hardware, there is no place for the heat to go. That heat is being generated the second the camera is turned on. Video just gets it there faster.

We're not disagreeing that more processing requirements requires more RAM usage and a larger processor load (and the cramped nature of the R5/R6 also raises temps). I'm also not going to disagree that new AI tracking systems take up more processing (as they're applying more real-time filters and looking at denser data sets). But 8K video processing is happening on top of other processes: including AF. I have only been stressing that it's not a minor processing and memory feat to go from 8MP to 40MP at 30fps

In regards to the juggling acts of the processes going on at one time (and raising heat)...it would be interesting if there is a 1D equivalent mirrorless: there might be less load and heat if you have several processors scattered on PCBs...and certainly a larger body would allow more room for heat dissipation. And a price differentiation for a mirrorless to do 8K without overheat shutdowns

Seems like it might take a lot of user reports to figure how many degrees might be gained shooting continual live view in the rear LCD, burst shooting, video modes, etc (especially burst and higher video resolutions might have more substantial heat gains because of bandwidth and faster writing to card). And then also if there's reliable situations where you get a heat warning that doesn't reduce IQ vs a shutdown that renders the camera useless for how much time.

davesrose wrote in post #19125017
We're not disagreeing that more processing requirements requires more RAM usage and a larger processor load (and the cramped nature of the R5/R6 also raises temps). I'm also not going to disagree that new AI tracking systems take up more processing (as they're applying more real-time filters and looking at denser data sets). But 8K video processing is happening on top of other processes: including AF. I have only been stressing that it's not a minor processing and memory feat to go from 8MP to 40MP at 30fps

In regards to the juggling acts of the processes going on at one time (and raising heat)...it would be interesting if there is a 1D equivalent mirrorless: there might be less load and heat if you have several processors scattered on PCBs...and certainly a larger body would allow more room for heat dissipation. And a price differentiation for a mirrorless to do 8K without overheat shutdowns

Seems like it might take a lot of user reports to figure how many degrees might be gained shooting continual live view in the rear LCD, burst shooting, video modes, etc (especially burst and higher video resolutions might have more substantial heat gains because of bandwidth and faster writing to card). And then also if there's reliable situations where you get a heat warning that doesn't reduce IQ vs a shutdown that renders the camera useless for how much time.

We already almost have this. The R6 is basically the 1DX3 in a smaller package. The 1DX3 doesn't have the overheating issue, but also has a dedicated digic7 or other processor for AF processing, etc. Also more space inside, and no IBIS.

TeamSpeed wrote in post #19125070
We already almost have this. The R6 is basically the 1DX3 in a smaller package. The 1DX3 doesn't have the overheating issue, but also has a dedicated digic7 or other processor for AF processing, etc. Also more space inside, and no IBIS.

There's also better video specs for the 1DX3 (and improvements with speed including the separate processors and larger body/battery with 1DX3). Seems the 1DX3 is still staying the defacto b-roll camera for those film-makers that Canon has been marketing HDSLRs (and Sony, mirrorless) for. 1DX3 video specs: 5.5K/60fps 12-bit RAW (and DCI resolutions). R6: 4K UHD/60fps 10-bit. Would be interesting to see thermals of heat generation of R6 recording UHD and 1DX3 recording 4K...not just difference in amount but where heat gets distributed (Like Lens Rental’s R5 article).

Thinking out aloud: Since we know R5 doesn’t heat (or at least not as quickly) in 4K 60 when external recorder is attached, has anyone tried plugging in a dummy HDMI adapter and see if the camera is fooled that way. I am referring to the dummy HDMI adapter that crypto currency mining folks use to fool the PC graphics cards into thinking that there is an output device attached. This is a very very very long shot but who knows

I'm pretty confident that won't work. Basically, just plugging some adapter will just be read as no video signal. You're then left with no video at all. At best that adapter won't be read and then recording will be the same internal means. Running video via HDMI and recording off camera does best because more of the video is off loaded from these cramped internals we've been talking about. So cinema production folks are used to a rig system: in which with a HDSLR/mirrorless you can have external recorder, monitor, and external dolly equipment that handles motion stability. The cinema camera is bigger since it has larger AF/zoom racking systems for the lens, space for a rotary shutter, and space for the processor and recording medium. I think the main attributes that make the R6/R5 more a system for events photographers who want to get into some video is that they do have IBIS, perhaps some smooth AF focus, and with most workflows you can have up to 30 minutes internal recording. Given all that, I'm not really sure how many people should venture into the 8K video the R5 advertises?

Also keep in mind that HDMI isn't just a video/audio feed. HDMI is a messaging protocol. This is why there are so many issues hooking up various HDMI-enabled components and having things flake out on you. It was the production studios' push to try to stop pirating movies by those that like to play movies through and record at the other end. I quite honestly hate HDMI, it has caused me so much grief over the years as I tried to send HDMI signals wirelessly across the house, and have tried to hook up video gear 100-200 feet away via cables and HDMI-ethernet-HDMI conversions to cover that distance.

I really wish camera companies would give us SDI and false color in mirrorless and DSLR form factors, but alas, I understand those are up sells for cinema cameras, unfortunately.

umphotography wrote in post #19124798
Man from what Im reading, It looks like a battery for every 2 hours of shooting for wedding use. 5 batteries for each camera for a 10 hour wedding ?? Sound about right....Thank god 5D4 batteries can be used....still its going to be a PITA to walk in with 14 batteries to cover a wedding.....I go through 2 on my 1Dx2 and often times i will be on #3 at the end of a night at the reception

Still sitting back and watching all the develop. I have none of these issues with the 5D4 and 1Dx2...None

About BATTERY LIFE:

The most helpful thing I've found for battery life is to power off the EOS R5 when not actively shooting.

DISCLAIMER: I have my EOS R5 bodies set up for maximum performance (high frame rate in the EVF) and none of the ECO settings, so I'm likely going through batteries at the maximum rate.

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For extended battery life I highly recommend using the newer LP-E6NH batteries if possible, there is definitely a difference in capacity.
With two of the LP-E6N batteries in the grip I could barely make it through a short 4-hour wedding. I replaced the two LP-E6N batteries for the last 30 minutes just to avoid running out unexpectedly, but the other EOS R5 body using two LP-E6NH batteries was at roughly 50% capacity remaining. I say 'roughly' because I was only going off of the battery icon, I should have pulled up the menu to see exactly what the percentage was.