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Canon EOS R5 overheating - Is Canon working on this?
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Canon EOS R5 overheating - Is Canon working on this?

There have been reports (and mock outrage) over the 20 to 30-minute overheating limits on the EOS R5 video recording times.  While typically the problem isn't doing a video continuously for 20 or 30 minutes, but the buildup of heat over time forcing the camera to shut down for a long period of time to cool off.  I get that this is problem, but some are interestingly going a little overboard on it.  This thing shoots 4K120p what other camera does that? What other camera shoots 8K right now?  Downsampling 4k30P from a 45MP sensor - what other camera does that? But I digress, welcome to the Internet world and hysteria being spun with some with ulterior motives.

Of course, there is a real problem for some, especially in hotter environments, or ones that need better cycling between usage, and cooldown.

Over the past few years, I've noticed some curious cooling patents from Canon, and I'm wondering if Canon just may not be working on a solution for this that they'll come out with. This solution would only, however, work with EF lenses, as it involves using an adapter for RF cameras, but what essentially it allows you to do is actively cool the sensor from the front of the camera.  Of course, the problem with this is that it won't work with all the cool RF glass unless you are willing to also lose infinity focus.  However, using this solution would certainly assist in creating a longer operating camera.

This adapter could also be used to quicken the cool-down time. For instance, if you shoot 8K for 20 minutes and it overheats, you shut down the camera, put the adapter on, and cool down the camera much quicker than to rely on ambient air.  Using it this way, and not during shooting would still allow you to use you RF lenses, and provide greater up-time cycling.

Another advantage of using an adapter over having active cooling built into the camera is that you can cool more than one camera with the adapter, and if you shoot stills you don't need it, and thus also don't need the extra bulk and weight of the internal active cooling.

In this patent application Japan Patent Application 2019-186871, you can see the adapter (labeled as 100).  The camera does have to be properly built to handle heat transfer from the sensor to the lens mount, but this is certainly something Canon could accomplish.  One of the engineering problems that even Sony and others have is how to cool a sensor that is not fixed in place because of IBIS.  Flexible heat transfer materials made of polymer do exist, so it's possible to cool the sensor directly even with IBIS.

According to Craig at CanonRumors who has been dead on with the EOS R5 and R6 leaks, some creative adapters are coming in 2020.  Could this be one of them? It certainly makes a lot of sense for Canon to address this area of weakness (even though it seems to a bit overblown by some) in the R5 video recording.

While we don't know what exactly Canon is releasing, with already three adapters available for the RF mount, it seems likely that we'll see some more esoteric adapters in the future.  This certainly helps resolve some perceived issues with the camera.

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