I made some measurements.
Benq gives out ANSI on/off contrast 1000. With any gamma or brightness setting or lamp mode, always 1000.
Runko with iris 14000, without 3500
But despite this, I would prefer some films like Аvatar to look at Benq.
I mistakenly thought that the gamma 2.8 gives better black
I found that the gamma 2.2 or gamma BENQ makes a brilliant white and better sharpness.
My settings gamma Benq or 2.2, Contrast 60, Brightness 42 ( For SDR )