The shadow on the side of the frame is the shutter. However some lights with some cameras can do high speed sync. So you can go faster than sync speed, but usually with less flash output.
It’s not that the lights aren’t fast enough it’s that above a certain speed your shutter isn’t fully open at one moment, instead it’s a slit travelling across.
The reason your speed light works is because in hss mode it rapidly flashes, effectively creating a constant light during the exposure.
Source: 23 years working at a place called ‘The Flash Centre’
The shadow on the side of the frame is the shutter. However some lights with some cameras can do high speed sync. So you can go faster than sync speed, but usually with less flash output.
I know what it is. The lights aren’t fast enough to sync with the shutter speed.
The same doesn’t happen with a speedlight
It’s not that the lights aren’t fast enough it’s that above a certain speed your shutter isn’t fully open at one moment, instead it’s a slit travelling across. The reason your speed light works is because in hss mode it rapidly flashes, effectively creating a constant light during the exposure. Source: 23 years working at a place called ‘The Flash Centre’