Nikkor-Q 135mm f/3.5 Non-Ai is a moderate manual focus telephoto lens designed for Nikon F mount cameras. The 135mm NAI lens has a metering prong to couple to early Nikon F, F2, Nikkormat and Nikkorex meters. The lens employs high image quality and works seamlessly with Nikon manual focus SLR bodies. The lens features four elements in three groups optical construction, seven curved iris blades, 18° angle of view, 5 feet close focusing distance and 52mm filter thread.