This Yongnuo 50mm f1.8 lens is a standard 50mm autofocus lens, originally available for Canon EF mount, but here presented in a Nikon mount. Because this was originally a Canon-mount lens, and Canon focus rings turn in the opposite direction, you may be wondering whether it focuses the "correct" way for Nikon. The answer is yes, it does: in a strangely overcomplicated gesture, the manual focusing ring is connected to the focusing scale with a reverse gearing system, so when you rotate the focusing ring, the scale travels in the opposite direction. Guess it beats redesigning all the focus gearing, but it sure is unexpected. Anyway, it works fine, everything is fine.