Spectrum ST4 is great for those bread and butter quick 2 axis tracking interview shots. Great for slow and quick moves. Set spectrum on ping pong mode and let it continuously loop, while you can move on to other tasks.
As a 4-axis controller, spectrum ST4 is can pull focus as well, for those premium shallow depth of field interview shots. You’ll need this capability to keep your target sharp. Example of products without focus tracking:
Get a slight push and pull feel depending on how far off center you go.
Add more dramatic effects or build suspense, all while keeping your subject sharp.