Chrosziel's StudioRig Video VariLock 2 QuickFit has double-sided connection for the handwheel follow focus control with 2 variable angle stops and a focus lever. The StudioRig's gear unit extends the resulting angle of rotation of the video lenses. Further adjustments are made by the use different gear diameters. All gear drives can be easily mounted without tools. The three gear pitches are available for different lens manufacturers.
The QuickFit versions slip onto the rods from below - no need to dismantle other accessories. They come with an intermediate 19mm rod adaptor.
The handwheel with the VariLock 2 Module, allows easy setting of two mechanical stops.