Hi guys, I'm looking for a competent answer. I bought a Godox QT400III for photographing water droplets and found that starting from 1/2500 and up to 1/8000 of a second, I get horizontal lines in the picture across the entire field of the frame.
At first, I decided that the problem was in the Godox flash. Then I checked my camera with Yongnuo HSS speedlight and YN622C HSS synchronizers. There is also a problem with horizontal lines with this flash.
Then I checked the Godox QT400III with my old Canon 6D SLR camera and the Canon M50 mirrorless, everything is fine up to 1/4000 of a second (these cameras can't shoot shorter than 1/4000).
Who knows what the problem is and is there a solution?
P.S. Firmware versions updated
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.