Vespobuteo
Well-known member
One thing that caught my eye in that detailed review was just how much quicker the AF was on the FF (6D) against the 7D (irrelevant of lens used). I guess this is just because the 6D has a newer AF system OR is it always the case with FF v crop Camera. I must admit I had never even considered that a FF Camera would AF quicker than a crop as I always though AF speed was more to do with the lens!
"The area where the 6D really shines, however, is in acquiring focus consistently in very low-light conditions. Canon has rated the center AF point's sensitivity at -3 EV, one stop lower than any full frame DSLR on the market. And our real world use with the camera bears out this impressive performance."
http://www.dpreview.com/reviews/canon-eos-6d/12