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The Canon EOS R5 May Be Plagued by Overheating Issues in Both 8K and 4K Modes

Ever since Canon declared that the newly-announced EOS R5 would be able able to shoot 8K RAW video with NO crop, people have been waiting to hear the “catch.” Would record time be super limited, or would the camera simply overheat very quickly? The answer, it seems, is “both.”

The whole controversy more or less began when a warning page—ostensibly supplied by Canon to “the largest UK pro-video dealership CVP”—was published online. We first saw it on EOSHD, and it shows the record time limitations and overheating issues inherent to a 45MP camera that shoots 8K/30p RAW video and 4K/120p 10-bit video, internally, with no active cooling to speak of.

The charts show the maximum record times for 8K RAW and 4K/60p from cold start, under ideal conditions, followed by the maximum record time after the camera is allowed to cool off for 10 or 20 minutes. As you can see, if this information is accurate, it is extremely problematic for Canon… especially when you consider how recording in direct sunlight could affect these max times.

Having a maximum recording limit of 20 minutes on 8K RAW and 30 minutes on all modes is totally understandable. Not every camera maker has followed Panasonic’s lead yet by removing the standard 30 minute limitation on hybrid cameras, and some limit on the record time was expected. It’s the recovery times that look the worst.

Even after a 20 minute break from shooting, the camera is only expected to shoot for 8 minutes before overheating and shutting down once again; if you can only rest it for 10 minutes, you’ll only get 3 more minutes of shooting.

YouTuber Max Yuryev explains the issue well in the video below, diving into what it means for photographers/filmmakers, and what it means for Canon.

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