Sushanta Barman Posted April 21, 2019 Share Posted April 21, 2019 Why is dslr cameras if we shoot a scene with a practical tungsten or LED bulb it causes flickering in the video footage?? I know a bit that the frequency of light doesn't match the frequency of camera but if I take my shutter speed from 1/120 to 1/30 there if no flickering seen in the video footage. Why? What will happen if I use cine cameras ( it has shutter angle ) ? Link to comment Share on other sites More sharing options...
Robin R Probyn Posted April 21, 2019 Share Posted April 21, 2019 Roughly speaking you want to make your shutter angle a multiple of the countries frequency... eg.. 1/50th /1/100th in 50Hz / 1/60th/120th.. in 60Hz countries .. for "normal" motion blur in cine mode there is a 180 degree "rule".. shutter is twice frame rate.. but if your shooting say 23.98p in a 50Hz location use 1/50th.. even if you have a 1/48th option.. to avoid flicker from practical lights .. LED is also tricky as if they are in anyway dimmed then will flicker what ever you do.. ! 1 Link to comment Share on other sites More sharing options...
Sushanta Barman Posted April 21, 2019 Author Share Posted April 21, 2019 (edited) Yes, what you are saying is right, but I am still confused technically about why lowering the shutter speed to 1/30 from 1/60 cause a flicker-free video footage ?? Edited April 21, 2019 by Sushanta Barman Link to comment Share on other sites More sharing options...
Robin R Probyn Posted April 26, 2019 Share Posted April 26, 2019 yes no idea.. curse of LED lighting... but tungsten should not flicker .. unless shooting very high speed frame rate.. Link to comment Share on other sites More sharing options...
Shane H Posted May 1, 2019 Share Posted May 1, 2019 https://www.bhphotovideo.com/explora/video/tips-and-solutions/flicker-free-lights-and-why-they-are-important-you Link to comment Share on other sites More sharing options...
Sushanta Barman Posted May 1, 2019 Author Share Posted May 1, 2019 Thanks, it has been a real help Link to comment Share on other sites More sharing options...
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