The Hasselblad 503CW is a 6x6 SLR medium format film camera introduced in 1996. It was the final model in a series that began with the 1957 Hasselblad 500 C. This fully mechanical camera is compatible with C, CF, CB, CFI, and CFE lenses, which feature leaf shutters. These lens shutters offer speeds ranging from 1 second to 1/500th, as well as a bulb mode. While it uses a traditional manual film advance, automatic film advance can be achieved with the optional Winder CW.