Introduction Unlike the Nikkor 600mm f/4, which as a manual focus lens at the time was first introduced in back in 1977, the manual focus 500mm f/4 was only introduced in 1988 after repeated requests to the maker to offer a smaller, lighter weight option as that made popular by arch-rival Canon. The current AF version was introduced in 2007, weighs 3880g, boasts 14 elements in 11 groups (including 3 ED glass elements), and a single Nano Crystal Coat. As well as an ultrasonic type AF motor, it focuses to 4.0m (3.85m in MF) also has