Quote:
Originally Posted by rma
I did some tests now using the iPhone XS Max camera with following results:
- filming in normal mode -> no flicker
- filming in slo-mo -> flicker for a few seconds, after that no flicker anymore
- filming in slo-mo, portrait -> flicker from left to right
- filming in slo-mo, landscape -> flicker from top to down
if you change the color of the front light and/or the brightness does not affect the flicker speed or amplitude.
As I already wrote, the flicker stops after a few seconds. If you then put a hand in front of the camera while recording and remove it again, it will start to flicker again for a few seconds. After a few seconds, the flicker stops again.
I am not sure if this is PWM or something else that tricks the camera.
I uploaded a video here: https://youtu.be/TTiTNSmnX4k |
Rest assured that it is pwm, your camera just automatically adjusts shutter speed and thats why you stop seeing the flicker after few secs.
I read that few folks mentioned that they dont have issue(headaches or eyes getting tired fast) with pwm.
Basically, pwm constantly turns off and on the light in a given interval, depending on the frequency of the driver they use for the leds.True, there might be no apparent instant harm, but id rather not have such a device shining on my eyes for prolonged intervals of time. Changed my previous monitor just because of that fact.