NG
1/50th and 1/25th shutters for 50i and 25p are both fine. It's when you start running at >50Hz sampling you get issues.
You see nasty lighting flicker on 3x frame rate SuperSlowMo which runs at 150i if the scene is lit with 50Hz discharge lighting. To avoid it you either light with high frequency discharge lighting, or multiple lamps across multiple phases which will even out.
You can also have the issue with 60Hz lighting if you shoot at 50Hz (say using a UK camera in the US) Sure you can shutter it out - but that introduces some additional motion artefacts.
Also beware CMOS cameras in discharge lighting situations if you don't have a global shutter. The scanning structure of most CMOS cameras (the same thing that causes flash banding and jelly motion) means that you can have all sorts of issues caused by it.
noggin
Founding member
If you mean 1/50th as a shutter speed, does it matter much when it comes to lights flickering? As long as the
framerate
is 50fps or 25fps, you'll be in sync with the lights whatever your shutter speed is, won't you?
1/50th and 1/25th shutters for 50i and 25p are both fine. It's when you start running at >50Hz sampling you get issues.
You see nasty lighting flicker on 3x frame rate SuperSlowMo which runs at 150i if the scene is lit with 50Hz discharge lighting. To avoid it you either light with high frequency discharge lighting, or multiple lamps across multiple phases which will even out.
You can also have the issue with 60Hz lighting if you shoot at 50Hz (say using a UK camera in the US) Sure you can shutter it out - but that introduces some additional motion artefacts.
Also beware CMOS cameras in discharge lighting situations if you don't have a global shutter. The scanning structure of most CMOS cameras (the same thing that causes flash banding and jelly motion) means that you can have all sorts of issues caused by it.
Last edited by noggin on 12 December 2014 11:01am