Originally Posted by ibre34
ohhh... but there is any standard for gamma?
The standard for gamma in dark room is 2.2, but there is any standard for a light room?
No there is not a display gamma that has been standardized.
I tend to agree with Calman's recommendations based on viewing environment in a grossly generalized way, but it depends also on the CR performance of the display, both on/off and ANSI.
I will go between 2.3-2.5 in a dark room, and closer towards 2.2 for a moderately lit room, and all bets are off for bright sunlight windows etc. but again GROSS generalization here.
Gamma is complicated because it is affecting the step delta differently down low than up high because the slope is increasing below ~50% as you lower the gamma, but the slope rises above ~50%. You have to pay attention to both shadow detail in dark scenes, and depth in the bright scenes. People tend to forget about the latter part, and focus only on shadow detail, to the detriment of the entire 'picture' so to speak, and invariably end up with too low a gamma with tons of shadow detail (not all which is supposed to be visible anyway...) but flat pasty and ugly pictures.
And then if you can tweak more locally on the curve it gets more elusive.
Wish it were simpler, but it isn't.