The 100-200mm f/5.2 Zoom features a 14 element 12 group design with a focal length range that is ideal for studio use. One lens can be used for full-length portraits to head shots eliminating the need to change lenses, synch cords or camera position throughout a sitting. Because of Mamiya computer-aided design and manufacturing techniques, the 100 - 200mm Zoom provides image performance equal to prime focal length lenses. It offers a choice of helicoid or camera bellows focusing. A tripod support bracket is included. Applications include studio portraiture, fashion and landscape photography. Equivalent to 48 - 97mm Zoom in 35mm format.