Most tripods which are suitable for the HD100 will allow for two pan handles. The extra handle is usually readily available and can be ordered with your tripod (check our DV Info Net
site sponsors). Typically with pro cameras such as the HD100, the focus controller is mounted on the left tripod pan handle and the zoom controller is mounted on the right tripod pan handle. There are a wide variety of focus and zoom controllers for the professional broadcast video lenses used on the JVC GY-HD100 series camcorders. Common brands of controllers include Fujinon, JVC, VariZoom, Bebob, Bogen, and Libec just to name just a few.
Here are some photos of an HD100 dressed out with focus and zoom controls on twin pan handles.
Moved from the HD100 forum to the Lens Controls forum. Hope this helps,