Theunique TC-16A teleconverter gives autofocus capabilities to many F mount manual focus lenses! When used on a suitable camera body, this teleconverter dials in focus automatically after manually focusing to the general distance. Compatibility is limited, however: Nikon recommends the TC-16A only with the F-501/N2020, but several other bodies including the F4 and F/N90 work as well. Please confirm compatibility with your intended camera body. Excellent cosmetic condition, good working order.