Andrew Reid

A comment on Hugh's YouTube video explains why the testing needs to be more thorough. Most of the reviews were put out in a hurry and don't tell the whole story on the A7S III thermal limitations. Hugh: I am an Electrical Engineer of 30+ years designing electronics for the automotive world which must maintain operation (NO shutdown) to 85C (185F) and without permanent damage over 100C (212F). The trunk of any car in Phoenix, Houston, or Florida (where I live) will easily exceed 140F for 6 months of the year. I contacted Dan and expressed my concerns with some test errors he made, his interpretations regarding heating/damaging of electronics in general, plus other variables reviewers continue to miss. It looks like you are trying to make some honest assessments here but there are a multitude of variables here that you (and others) are still missing. I don’t think Dan took my suggestions well so I will try you. As you noted, and I pointed out to Dan, internal heat generation (radiation) is outbound as well as thermal absorption (inbound). There are actually THREE thermal tests that must be made to determine if the camera is a net “source” or a “sink”; (1) standard room temp of 23C (73F), (2) outdoor/hi-temp under “sun-load”, but also CRITICAL is (3) which is simply outdoor/hi-temp in the shade! This shade reference is CRITICAL since this test will tell you if the thermal failure is absorption (inbound) vs. radiation (outbound) induced. You MUST do this third test or you cannot make ANY conclusions on thermal propagation of the camera. No reviewer is understanding this point since they are not Engineers. I get that but then they extrapolate conclusions which are simply wrong – some favoring Sony and Canon and some against both brands. Until you have a FLIR type camera showing thermal mapping of the body (AND the body/lens SYSTEM), you really don’t have any idea where the heat source/problem area is located. It is simply assumed to be worst on the back side since this is what Photographers look at all the time. It may be on the bottom or on the sides – no one knows until you look for it at least with some JK type thermocouples.

Only two reviewers have really tested the A7S III for reliability problems in direct sunlight. This isn't surprising given Sony's canny knack of avoiding in-depth reviewers like myself, by giving the demo units to Paris Hilton types instead. But still the truth leaks out... The thermal energy from the sun on a hot day is absorbed by the black chassis meaning the heat sink in the camera acts as a conductor two ways, both from the CPU to the body and from the body to the CPU, the latter really hammers recording times and reliability outdoors. Canon said it themselves in the recent Komodo style cine cam patent... Now that very fast processors are in the latest cameras, heat is becoming more difficult to manage. Well, try again Sony and let's see how long their moral high-ground lasts over Canon!

Seems fishy to me.

https://www.eoshd.com/news/the-real-world-4k-hq-overheating-limit-is-2-minutes-on-the-canon-eos-r5-say-dpreview/

You will still buy it though, no? 🙂

Finally the type of test that everyone should be talking about, but nobody bothered doing! Richard Butler: "In just under two hours I shot 164 images, all in CRAW, some as parts of short bursts. I then switched to video mode to capture some 4K HQ footage and was confronted by 04:00 minute limit, despite plenty of card capacity. The overheat warning displayed immediately and, after shooting three sub-10-second clips the camera said it would only shoot for another 02:00 minutes." FUCKING SHIT!

Yes it's true I am changing to SLOG.com and everything will have a magenta tint.

Oops! I wonder if any leaks will come from this. I've always wondered what is behind the total mystery that is Canon.

Stop the bullshit people. I don't logon to read these petty arguments every day.

Rumoured specs from Canon Rumors: https://www.canonrumors.com/rf-mount-rumored-cinema-camera-specifications-cr2 Same Super35 sensor as the Canon Cinema EOS C200 Internal ND filters (mechanical) up to 6 stops 2x Mini XLR inputs Full-size HDMI 4K 4:2:2 10bit in ALL-I and IPB up to 120p 1x CFexpress Type B Slot 2x SD UHS-II slots External RAW recording options up to 4K 120P 2x LP-E6NH batteries Camera size smaller than the EOS-1D X Mark III Price: $4499 USD And may take on it: https://www.eoshd.com/news/is-this-the-new-komodo-style-4500-canon-mini-cinema-eos-camera/

I think "Leica50mm" is the anonymous online troll account of Canon's US marketing boss

Ahem. "The camera was turned on for 10 minutes to light, frame, expose, format, etc. Then switched off for 10 minutes." Bit of a strange way to shoot. Light, frame, expose, compose... then do what for 10 mins? Turn camera off and have a cuppa? "The camera was turned on again and I shot for 2 minutes, with a 2-minute break thereafter. Camera is turned off for all breaks. Repeat for three takes." So 3 takes of 2 minutes = 6 mins... With leisurely 2 min break in-between each clip! Very light usage. "The third break is 5 minutes, not 2 minutes." So we're now 3 short takes in after the 10 minute break followed by 2 breaks of 2 minutes and another one of 5 mins. That is more downtime than a French air traffic controller. "Camera completed Master and MS1. At the end of MS1, the estimated time dropped to 5 minutes. The 5 minute break didn’t help. During the second take in MS2, the camera overheat warning started to flash." Master and MS1... Apparently these are his made up dialogue scenes. How long were these? "I was able to finish the second take and shut the camera for two minutes. When I switched on again, the estimated time was 1:00, which is less than the roll time. So I had to stop the test." Shoot over. "Overall, the camera was able to shoot for exactly one hour before being on the verge of overheating." 1 hour of on-off short takes and it's dead! NOBODY can work like this... Not even the French.

Neither can the R5 6K is perfectly fine for green screen. Going to 8K brings only marginal benefits and is more taxing in post.

The sound of squealing breaks and a u-turn faster than you can say "no more 4K crop"!

Nope, been a bit of a nightmare. First quarterly lost since they started reporting (2001). Image service down the drain. EOS R5 & R6 defective. Coronavirus. What next? If it isn't a wakeup call for them I don't know what is 🙂

Canon web stores are down I hear the server has overheated... or maybe they are just editing out the EOS R5 pages 😂

Probably the grade from SLOG

Sod the recall. Canon can sell the EOS R5 to Icelandic elves and eskimos.

Lame AF is showstopper for Alexa then too.

Stranger things have happened.

Note 10+ and S10 camera does have nice colours and dynamic range. But it's nowhere near the P40 Pro in low light or if you pixel peep it. The S20 Ultra is also pretty far behind too with most shots.

Ah so that's the solution then. Move to New Zealand where it is currently winter?

It could have been a last moment marketing push to add the features. And engineering didn't have the time to implement it properly. Funny thing is, Richard Butler read all the press releases for the cameras and still wrote this. The question is why? What did Canon tell him? Probably because they originally intended it to be a 4K pixel binning 30p 8bit cripple camera. Then marketing looked at the Sony sales chart and A7S III rumours and wet the bed. Then Japanese senior management approved the u-turn. And the engineers went... Erm... ok! A cock up all round!

https://www.eoshd.com/news/canon-said-eos-r5-shoots-comfortably-on-high-end-production-sets-ideal-partner-to-c300-mark-iii-why-overheating-is-not-on-purpose/ My latest opinion, it's not a cripple hammer moment. They genuinely wanted this thing to be used by pros on same high-end productions as a Cinema EOS C300 Mark III. Well that's how it was sold to us in April anyway. What changed at the last minute? Were the overheating results expected and a surprise to Canon? Yep, I think so.

B-Cam to C300 III anyone? https://www.eoshd.com/news/canon-said-eos-r5-shoots-comfortably-on-high-end-production-sets-ideal-partner-to-c300-mark-iii-why-overheating-is-not-on-purpose/