bronica (which has discontinued camera production), fuji, kyocera (which has also ceased production of their contax cameras), mamiya, rollei, pentacon (former east germany), and kiev (former soviet union) have also produced medium format slr systems for a considerable period of time. mamiya produces what is termed a medium format digital slr. other medium-format slrs, such as those from hasselblad, accept digital backs in place of film rolls or cartridges, effectively converting their film designs to digital format use.