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 headshots 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.