Keine Ahnung, ich hab’s ja auch nicht ausprobiert
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https://www.mibreit-photo.com/blog/canon-eos-r5-image-quality/
„But even at base ISO there can be a problem with noise showing in the images. The longer the exposure time, the more hot pixels appear. For that reason, modern cameras come with a function called Long Exposure Noise Reduction. With this function active, the camera will take an additional dark frame after finishing the main exposure. This effectively doubles the time it takes to create a photo. The benefit is that hot pixels are automatically removed in the process.
Now you might say: Great, just keep Long Exposure NR always active and be fine.
But while the camera creates the dark frame, it is basically useless. If suddenly the sky starts to glow even more during sunrise or sunset, I cannot take another photo until the camera finishes its processing.
This is why it is important to have a Camera that can produce clean long exposures, even without Long Exposure NR turned on.“
„We already heard about the
Canon R5's heat problem with video. And I'm sad to say that this problem is also apparent when taking long exposures.
The R5 shows by far the most amount of hot pixels of any camera I have tested. Any exposure of more than two minutes will be unusable for me without Long Exposure NR active.“
Ich habe die relevantesten Stellen fett markiert.
Es gibt dazu auch ein Thread:
https://www.dslr-forum.de/showthread.php?t=2036608
Deswegen hoffe ich, dass wenn Canon schon so ein High MP bringt, sie entweder das alte R5 Gehäuse und/oder die Bauteile modifizieren und hitzeoptimierter anbieten. Oder ein anderes Gehäuse entwerfen. Die schlechteste Möglichkeit: Canon nutzt die Synergie, tauscht nur den Sensor aus und läßt alles andere auf den alten Stand.