During the a7S III announcement, Sony made much of the heat dissipation technology that allegedly allows the camera to record 4K/60p video internally for over one hour. The implication was clear: "our camera doesn't overheat." But at least a couple of reviewers have had a different experience...
Amid recent reports that the new Sony a9 would overheat easily in fairly normal shooting conditions, Imaging Resource decided to put the mirrorless camera through an overheating test to see whether it has a problem.
Forget DIY camera mods for keeping your sensor cool: Nikon has a much fancier solution. A recently published patent by the company (No. 2012-198447) shows a camera attachment that's specifically designed to prevent sensors from overheating. It attaches to the bottom of the camera and blows cool air into the body through the tripod mount underneath. If computers have dedicated cooling fans, why can't compact cameras?
Last September, Sony issued a notice informing customers that its pellicle mirror cameras would overheat during extended …
If computers can have fans, why can't cameras? With recent Sony cameras running into unexpected limits due to the sensor overheating, Nikon may be looking to solve the problem with a good, old-fashioned fan. A recent patent filing by Nikon shows a mirrorless camera with a computer-style fan embedded into the circuit board.
Sony has issued an "important notice" that shooting HD video for semi-long periods of time with the A33 and A55 may cause the sensor to overheat, shutting off the camera. How long the camera lasts depends on ambient temperature and image stabilization is enabled. If it's 30° C (~86° F) the A55 can only go 6 minutes with IS turned on.