Canon 6D Dominates in Low Light Focusing Test vs 5Diii vs 5Dii vs Nikon D600

- Between 0 --> -3EV, the Nikon D600 is about 10-15% faster than all of the Canons.
- Between 0 --> -7EV, the Canon 6D is almost twice as fast as the 5Dii, ~20% faster than the 5Diii, and the Nikon D600 couldn't achieve any focus at all in extreme low light without it's AF illuminator.