Interestingly, Konica AR mount bayonet is almost identical to the Nikon F-mount. You just have to remember to turn clockwise to lock (F-mount is turned counter-clockwise).
This Vivitar Konica AR mount wide-angle that I picked up from eBay next to nothing fits surprisingly well on the Nikon D90. Nikon’s long flange focal length – typically an undesirable feature for SLR enthusiasts – has turned this 28mm wide-angle into an effective macro. The result is surprisingly satisfying. It captures amazing close-ups. The lens is sharp and easy to focus. Of course, there is no focus-to-infinity due to the aforementioned flange focal length.
Couple test shots:
*Please note: if you are attempting this fit, do it at your own risk. This particular combination has caused no damage to my Nikon but I’m not making any guarantees.
My Konica mount lens will not focus when mounted on Nikon camera.