The Heden CM55 256 12k is a digital version of the legendary horizontally aligned analogue zoom motor M26T. The CM55 have the same dimensions as the M26T so it will fit all the brackets and mounts available for the M26T motor but it's designed to work with digital control systems such as Preston Digital Microforce, MDR-3 and MDR-4 as well as Heden Ymer-1 and Ymer-3. Supplied with a 0.8 (32-pitch) gear module.