The Fuji GS645S Professional Wide60 is a medium format rangefinder camera released on October 1, 1984. It features a newly-designed EBC Fujinon W 60mm f/4 Orthometar-type lens, which is comprised of 7 elements in 5 groups and is mounted in a mechanical Copal 00 shutter. This 60mm lens is equivalent to a 35mm lens in 35mm format and has a 49mm filter thread. The camera's lens is protected by a circular "cow bar." It has a built-in light meter with a measuring range of 4 to 18 EV, and ISO can be set from 25 to 1600 in 1/3 stops. The finder contains a coupled double image rangefinder for focusing, offering 0.5x magnification with a 40mm baseline, resulting in a 20mm effective baseline. The GS645S uses 120 and 220 film in a 6x4.5 format and is known for its sharp lenses.