09-28-2020 12:05 PM
I have found an official answer from Gopro in Gopro Italy forum
Basically, they are studying the problem and also indicates that over 800 ISO the problem disappears.
09-29-2020 12:34 PM
I have tested with a blind scenario ISO 400... it is a disaster but is true that with light is not a problem.
Impossible to contact Gopro about this problem, Still we didn't find anyone without this problem.
10-05-2020 06:59 PM
Hello Everyone. Sorry to hear that you are having issues with the camera. A firmware release has been set to fix the issue of the pixels appearing in lower ISO settings. For updates, see https://gopro.com/en/us/news/hero9-black-launch-updates .
10-06-2020 02:15 AM
Well, they can't dissapear on the higher ISO settings. hot/dead pixels are physically damaged pixels on the sensor (tho hot pixels are like half damaged, their appereance depends on the sensor temperature, iso and expousure time). The only way to make them invisible is sensor mapping (taking picture with covered lens, it's called dark frame, it's basically making a map of damaged pixels). GoPro could add that option to the firmware, that could help. Basically every sensor have hot pixels, tho they shouldn't appear on the lowest iso settings and in expousure times used in daylight.