The F250 Motor Drive is a light and compact motor drive for standard film cassettes (20 and 36 exposures) and special cassettes with 33ft of bulk film (250 exposures). The interchangeable F250 is designed specifically for Nikon F series cameras. The motor drive increases Nikon automatic fire power to applications where frequent film changes are impossible. It has sequence shooting between two to four frames per second at shutter speeds of 1/8th to 1/1000th second. Single shots are made at any speed.