The HU4 features a large 4.6” sunlight-readable touchscreen display and handgrip-integrated controls for Light Ranger 2 operation. The lens library now stores up to 1024 lens records. Focus scales can be expanded or compressed by finger touch. Travel limits for focus, iris and zoom are set with the touch of a button and are displayed as brightly colored bars overlaid the lens scales. Non-linear iris scales are mapped to a linear scale. Focus knob drag is easily adjustable. Lens mapping translates the lens focus scale to any of 5 pre-printed focus rings making the focus “throw” for any lens the same. The integrated joystick can be selected to control either zoom or to track a subject for Light Ranger focus assist.