Are you sure? The scheduling I can see, but day/night sensitivity adjustment is fairly common and basic. If it doesn't have that (even tucked away somewhere in the settings), then maybe something old-school like putting a piece of electrical tape partly over the photoelectric cell on the front of the camera to block, say, half of the incoming light might work. That's done easiest on bullets, but you could do the same thing with a dome if you took the dome off.