The ZC-8, ZC-12 and ZC-20 are compact remote controllers for zoom servo lenses that can be easily attached to tripod head handles. The ZC-8 is compatible with Canon and Fujinon 8-pin servo lenses, the ZC-12 with Fujinon 12-pin servo lenses and the ZC-20 with Canon 20-pin servo lenses. They can also be used with film zoom lenses or Canon Power Zoom adapters. These smart remote controllers are lightweight and compact, yet affordable. Despite the simple design, you can also control the REC and RET functions. In addition, the zoom speed can be adjusted using the jog dial.