Continue to put new 850 through paces in autofocus. Initially I found the new AF setting baffaling but as I use more it has become a godsend so to speak. With the addition of focus pre-set buttons, the 850 has become the most focus friendly camera I have ever handled. In comparison to the D5 I have gotten higher % of sharp images with the 850 but only 6 frames as opposed to the D5’s 11-14 frames.