This is the leaf shutter tele lens for the manual focus 645 models. It allows you to shoot with a flash at any speed up to 500s and is the key for balancing available light or flash photography outside. This model has automatic cocking with the WG401 grip. This lens is in excellent condition and works perfectly. There is a light amount of dust on an internal element, but it will not affect your image quality. There is light cosmetic wear. Everything works perfectly. The cord and cap are included.