I just took delivery on a brand new Nikkor 50mm 1.2 ai-s lens today. It's a beautiful lens however something seems off with the aperture ring. There is considerable rotational play when adjusting from stop-to-stop. When moving from one full stop to the next, after the tactile 'stop' has been reached the ring has play back towards the previous direction of rotation. It does not appear to be affecting the actual aperture, its just as if the ring is loose. While adjusting exposure through the viewfinder the play in the ring makes it difficult to discern if I'm making fine-tuned aperture adjustments or if it's just play in the ring. Additionally at f1.2 the ring will continue traveling what feels like an additional half-stop and then stick, again not affecting aperture. This is my first Nikon manual lens so I'm not sure if this is just the name of the game or if I got a faulty lens. I've been using Olympus OM lenses of years and have never felt an aperture ring quite like this. If anyone has experience with this specific lens I would love to hear your comments. I'm gonna give B&H and Nikon a call tomorrow but wanted to hear some advice from fellow photographers. Thanks in advance.