question for experts your are, please? a little bit tricky, see long, so read it when you have the time
what is the main "heater" inside the a119s?
I've thought it's the processor, but
@Dont Knowler talks about the "hot" sensor imx291 in the a119s vs. "cold" ov4689 in the a119?!
Where I would like to come...
Does the operating temperature is higher in the main chamber of the a119s, with the processor as the source of the heat, or in the small chamber with the lens/mount/sensor imx291???
I've thought that this lens chamber is "suffering" from the heat of the main processor chamber, and the main reason why this small lens housing is closed and isolated from the main one.
Like this having the independent ventilation holes in front, so exposed to the exterior and isolated from interior.
So the air inside of this lens chamber supposes to passively isolate it from the heat of the processor, of course if this hypothesis is true.
But if @dont knower is right and the sensor is the source of heat, I'll go with the extra hypothesis that the main chamber with the processor is "colder" as better air cooling with a lot of ventilation around and in absolute bigger air volume, there is an interest to "connect" them, small and big chamber, with some extra drilled ventilation holes on the lens plastic housing, improving the air circulation and get lower temperature globally, so with the simple passive air circulation inside.
I've seen also on some videos some kind of metallic cooler tape over the processor, so maybe this kind of tape around the lens can help as the mini cooling radiator, waiting for the better solution, but if
@jokiin is right, the metallic part conducts and keep higher temperatures to the electronic board/sensor/lens, so maybe it will be even worst.
Up to
@gse,
@jokiin use the metallic mount with the same imx291 sensor/board to avoid the problem that
@viofo face actually with the V2.
@Nigel's idea is that the lens could be suffering from the temperature, moreover the dilatation of the mount, better cooling will help more and we can keep the focus of the "cold" stage setup.
I'll probably don't touch the focus for the moment, waiting for the
@VIOFO_Support to bring some technical answers and fixes.
We should trust engineers that have been developing this product for months.
Assuming that there is the prove and that in the "cold" state there is no focus issue ;-), the cooling improving of two chambers first and of course resolving the focus drift sensibility up to the working temperature with the improved mechanical mount & right choice of composite materials or metals will probably come to.
cheers