Behind the scenes UK experimental colour transmission 1957

[old_tv_nut]

Originally Posted by ceebee23

Afterall movie film is 24fps!

Fink's Television Engineering Handbook lists the following flicker threshold luminance vs. flicker frequency (for large area flicker):

Movies 48 Hz, 20 ft-lamberts;
TV, 50 Hz, 29 ft-lamberts
TV, 60 Hz, 180 ft-lamberts

Also stated: A positive increase in flicker frequency of 12.6 Hz raises the luminance threshold ten times.

So, you can see that the visibility of flicker is strongly dependent on image brightness.

It also states that the threshold is strongly dependent on the size of the flickering area, the surround brightness, and etc.