Small correction ScottK: 120, or 'medium format' film requires a longer equivalent focal length than that of a 35mm film camera lens to give the same angle of view. An 80mm lens on a medium format camera is regarded as a 'standard' lens, in the same way as a 50mm lens is regarded as standard on a 35mm (small format :-) camera. A portrait lens on a medium format camera will therefore need to be around 30mm longer than a portrait lens for the smaller film.