The VZ-PG-F12 provides remote zoom control for Fujinon 12-pin video lenses and it will clamp to any tripod handle, jib, or support bar with a unique offset articulated clamp for adjusting the angle of operation. The PG-F12 features a dual-variable system for versatile, precise control of zoom speed. Set the maximum desired speed on the dial (located in a 'trigger' position), then use the pressure-sensitive rocker to vary the speed from a crawl all the way up to the preset max. Alternatively, depress the rocker fully and roll the dial with your index finger to ramp the speed up.