Oh I did not think about that! Yeah, it achieves nothing, unless I suppose the fan is very bad quality and wobbles violently. Even the cheap fans nowadays are alright, I have some salvaged small fans that seem decent to work.enricosavazzi wrote: ↑Thu Aug 13, 2020 11:03 pmOne possible problem is that turbulence created by the fan blades in the air flow can transmit vibrations to the heatsink. It might be possible to reduce these vibrations with a "labyrinth" of baffles and/or a felt coating inside a sufficiently long air duct that leads from the fan to the heat sink. This requires a more powerful fan, but there is no particular reason why the fan should sit close to the heatsink. With an air duct, the distance between fan and heat sink can be as high as desired.
A possible solution might be using a heat pipe to carry heat from the camera to a large, convection-cooled heat sink. As long as there is no boiling (only evaporation) of the cooling fluid within the heat pipe, there should be no significant vibration.
A Peltier element with its cool side attached to the camera could also be used to pump heat away from the camera casing and toward a heat sink. Peltier elements are vibration-free.
Thermal electric cooling utilises a peltier element. Another method is simply 100% passive cooling, have giant heatsinks connected to the peltier.
The heat built up over time will have a negative impact on images, prolonged shooting generates hot pixels as we all know. Never had that issue with my z6 even over 3000 shots in a session, but the R5 overheats easily and the Z6 doesn't. A friend ran a quick test on his GFX 50R. He discovered that having the memory card slot chamber open actually cools the camera down. Over about 2000 shots, he said there's hot pixels that can be seen when zooming in. The GFX 50R isn't known for overheating I think. Many discovered this "fix" for the R5 too, I guess a lot of heat is indeed built up in that section and of course around the CFE cards. Those I've heard do get hot.