Happened again, Or my Rant

FDecker wrote:

SigmaChrome wrote:

mike earussi wrote:

Roger wrote:

Hi Lin

Your right, I've heard that as well. Sigma isn't the only one this happens to. From what I understand, most mirrorless camera have these issues.

Regards

Roger J.

The Sonys only overheat when shooting video.

Yes, so I've heard... and it's supposed to be caused by heat from the battery. So, keeping the battery as far away from the body as possible should cure the problem.

I use power grips on both my SD1 Merrill and Sony a6500 and I have never had a heat problem with either camera. But maybe I'm just lucky, although I did have over-heating issues with my old SD14 - but never when using the PG.

Roger: Are you using a PG on your Sigma cameras?

First, the battery is used also in other cameras and it works fine. Second, the circuit and especially the sensor and the processors will for sure dissipate more energy than the internal resistance of the battery. You see it by the simple fact that the Q can‘t take that much pictures with a fresh battery.

With the Q (any kind of Q), the sensor is on all the time while composing the picture and not just for the capture of the image. The H will have more of a problem because the sensor is larger and has more circuitry.

I experienced the problem only once in warm weather. But any time I shoot the sd QH more extensively, I notice that the region around the mount gets pretty warm. I assume the body works as a heat sink for the sensor and processors. In warm conditions, this doesn‘t work well.

BTW, if in doubt, why not just take out the battery when you get a overheat warning and check its temperature. If the battery is the cause, it should be pretty warm, close to hot. That would be a very obvious and easy to test the assumption.

And you can check the meta data of the pictures you took when you get the overheat warning as Ted correctly proposed in his email.

There is a third option. One which actually happened to Sony. Their sensors weren't overheating, their batteries weren't overheating, in fact there was no overheating. There was a problem with their heat detectors -- can't recall if it was placement or settings -- so they were raising the overhot warnings, and even shutting the cameras down, when it wasn't necessary. They issues a firmware update to change the settings.

But it was too late, their reputation was damaged. Some people still report their Sony cameras as overheating, when they aren't. And many non-owners still perpetuate the myth that they are actually overheating.

If the OP is reporting shut-down without a very hot camera, it could be the Sony issue, the heat detector, and not heat at all.

P.S. as a general comment, I disagree with the general comment that "it's a common mirrorless problem'. I have had several mirrorless cameras and never had a heat warning, and I live in a hot region.