In ArmA 2, I configured zoom in with "hold right click" and optics with "right click".

In ArmA 3, I did the same, but I have problems:
-I take the hunter and play as shooter
-I right click in order to have optics (it works)
-I hold right click in order to zoom (it works)
-BUT when I release right click, it's still zoom. I have to use "minus" (num. pad) to de-zoom whereas in ArmA 2, with same config, when I release right click, it does de-zoom automatically.