09-10-2017, 09:23 PM
The question of 25Hz flicker has been raised more than once. There are good reasons why it would have been less objectionable in 1936 than it is now. The first is that your central vision is not very sensitive to flicker but peripheral vision is. So a small screen viewed from a fair distance will seem less flickery. Another reason is brightness - modern pictures, even on a good 1950s set, are rather brighter than in 1936. Flicker is more visible at higher brightnesses. Finally I think we just got used to it. Many years ago I didn't notice flicker. Then I started doing some investigation of flicker as part of a research project and found myself increasingly sensitive. Now I'm used to LCD screens which don't flicker at all, even at low refresh rates. If I see an old CRT computer monitor at 60Hz refresh it's horrible. Of course you're sitting cloes to a PC so peripheral vision flicker matters more than with a TV.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







