Andrew_EOSHD wrote:
RCicala wrote:
Currantos wrote:
Thank you for posting this,
you sound like the "voice of reason", after reading this post.
It's gonna take time to clarify wall the points and discover the in's and out's of this of course.
Anyone brave enough to send their R5 to Roger please for disassembly and investigation?
Come on guys, it's just 4.5K, some of you can afford that.
LOL
No need, I'll be tearing one down as soon as LR has enough stock. But spoiler alert: I'm not going to figure out the heat issue by doing it. On the other hand, I won't claim to have the answer even though I don't.
Hello Roger
I'll look forward to your findings. I've already seen the teardown and there is no thermal pad between the magnesium alloy casing and the LSI. In fact there is even a PCB sandwiched between the casing Canon claims acts as heat sink, and the CPU. There's thermal pads over the RAM, but they leave a gap over the bare CPU. You would not attempt even to build a budget PC with such poor conductivity between the CPU and a heat sink.
Regarding the temperature sensor monitor in-camera... Yes, there is one. I'm reading from it. The CDA-TEK wifi app I am helping to develop, uses the official Canon API as well to read the heat related status flags and inhibitors (read-only variables) from the camera in real-time. You can poll the camera at any interval and extract all he status metadata.
The temperature in Celsius is as previous DSLRs. Magic Lantern did some research into this and they are also able to read the actual internal temperture from firmware. The sensor is on the main LSI PCB. You cannot read it over the API via Wifi. It has to be extracted from JPEG EXIF data. So my friend at CDA-TEK developed an intervalometer function in his app, to gauge the camera's temperature during normal live-view operation, during stills, and before / after 8K / 4K HQ video recording. The EXIF temps correlate with an infrared thermometer reading of the DIGIC X die temp, with the back casing removed. They also correlate with the overall PCB temperatures.
The battery demonstrates that the recovery times are not monitoring this temperature sensor on the PCB. It is simply a timer, and when reset, the camera does not attempt to read the PCB temp. It wouldn't be able to continue to lock you out of 4K HQ or 8K if it did so, because the temps are back to normal within a minute or two after turning off the camera. So the timer is used, and it is entirely an artificial limitation with no basis in thermals or physics.
It has also been shown that:
A) The camera runs at 59C during pixel binned 4K LQ recording after nearly 2 hours, but 61C in the 4K HQ mode limited to 30 mins from a "cold start". Cold start meaning you have not powered on the camera since at least 2 hours ago. As soon as you power on, even if you leave it idle in the menus, the timer starts to reduce on the 4K HQ 30 mins down to much less very quickly. Even in a fridge.
B) The camera internal EXIF reported temperatures plateau at approximately 62C after 15 minutes of 4K HQ recording. They stay there, and nothing changes on the EXIF temperature reported by the sensor on the PCB when it reaches 30 minutes. 62C is only 3 degrees warmer than the reported temps in the "non-heat limited" modes.
C) As customers, we get a say in what happens next. We invest a lot of money in hardware advertised as 8K or 4K HQ, or professional standard and $4000. We want it to do as advertised. Long after pre-orders were in, Canon released the "overheating times" but these are completely misleading because they don't take into account normal live-view usage and stills shooting. So after just 30 minutes of that, your record times are cut in half and after 1 hour of up-time during a shoot, even if you are recording no video whatsoever, your recording times go down to zero and you are locked out completely from the most cutting edge video modes Canon used to sell and market this camera.
You're a good guy Roger.
Don't get on the wrong side of this argument.
Look at the facts as I've been reporting and read all the articles fully.
Cheers!
This EOSHD Andrew is aware of an aluminium plate and the "missing thermal pad" is actually existed and sitting in the middle of this so called "PCB sandwich" and he intentionally omitted this fact to make this argument.
