Justin Hullinger
Member
Anybody have thoughts on the minimum PWM dimming frequency an LED light needs to have to avoid on camera flickering? I've heard answers ranging from 1000 to 3000 as well as 20 times the frame rate.
The question is in regards to the Martin rush par which has a PWM frequency of 2000 hz. Using a flicker calculator on David Satz dot com it seems I would get a flicker of 0.01 of an F-stop. I am not sure that difference would be perceptible on camera but it seems like it could appear as a soft pulsing. Chauvet seems to use 600hz. Some older Elation fixtures measured at 300 hz but newer ones are probably hight
Cameras are at a 180 degree shutter, 1/60th frame rate and 30 FPS.
The question is in regards to the Martin rush par which has a PWM frequency of 2000 hz. Using a flicker calculator on David Satz dot com it seems I would get a flicker of 0.01 of an F-stop. I am not sure that difference would be perceptible on camera but it seems like it could appear as a soft pulsing. Chauvet seems to use 600hz. Some older Elation fixtures measured at 300 hz but newer ones are probably hight
Cameras are at a 180 degree shutter, 1/60th frame rate and 30 FPS.