The Nikon 1 cameras are famous for being able to track focus with their on sensor PDAF.
But the story goes that if light is low, it will switch to contrast-detect only and will not track focus as effectively.
Does anyone knows at which point (in lux or EV levels) the Nikon 1 cameras switch focus mode and lose its high-quality track-focus capacities? (using either a kit lens or with the Nikon 1 18.5mm f/1.8).
In other words, at which light levels does focus-tracking works as advertised?