Fifty-five years ago today

[cbenham]

Originally Posted by old_tv_nut

That is correct, because black and white cameras did not have "gamma corrector" circuits, but instead operated the image orthicon "above the knee", that is, with partly linear and partly highlight-compressed transfer characteristics, which were only an approximation for the characteristics of a picture tube.

Thanks for this very interesting information.
I never knew about that because I missed out working with IOs, only getting into commercial TV in 1967, as the GE IO cameras were replaced with
GE PE 250 color vidicon cameras.