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Here at Kolari Vision, we love tearing into the newest camera gear to learn how they work and if they can be modded for infrared photography, full-spectrum photography, or other things. We’ve gotten really excited about the Canon R series over the last few years for their performance for IR, they make some of the best-infrared photography compatible systems on the market. With the new popularity of infrared in cinema and video in recent years, we were particularly excited for the R5 with its excellent video capabilities. When the R5 was released, we also learned that it overheats quickly in 8K shooting and in some 4K modes. Initially, this was handled through a timer chip in the camera independent of the actual temperature. After public backlash, Canon quickly released a new firmware that patched the timer issue and started actually using the camera temperature data instead, but even with this upgrade the performance boost was minor, for example at 20C instead of overheating after around 19 minutes, the new firmware allowed you to shoot around 25 minutes, and the recovery after overheating
In several thermal analyses of the camera, the processor on the motherboard seemed to generate most of the heat. In the stock design, Canon places two thermal pads partially over the processor and pumps the heat into a small heatsink. That heatsink however sits under another board and does not vent heat anywhere further.
To remedy this problem, we took an R5 apart and designed a new heatsink to vent the heat from the processor to the camera case where it could dissipate faster. We tested aluminum initially but eventually settled on a thick copper heatsink to transfer heat more efficiently.
This design draws heat out of the processor and brings it around the motherboard and out to the rear case where it transfers heat through a high-efficiency thermal pad. This design is fully internal to the camera and maintains the weather sealing of the camera.
We tested the modified camera at 4K-D 120FPS at 69°F (20°C). At 20°C, the stock camera lasts about 14 minutes while the modified camera lasted about 29 minutes.
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