The MOTOFOCUS for Sky-Watcher Equinox Pro ED80 Refractors from JMI Telescopes is a battery-operated hand controller with an electric focus motor that attaches to the shaft of a focuser knob (or the knob itself) for precise, vibration-free focusing without the need to touch the telescope. It is suitable for viewing purposes and for photography and features variable speed adjustment for coarse and fine adjustments. Precise positioning is achieved through electronic braking. Mounting it is easy and requires no drilling or tapping. The optional Digital Read-Out (DRO) or Digital Focus Counter (DFC) (sold separately) provides improved focusing accuracy and repeatability.