High quality JMI motofocus for precise vibration free focusing. A must have for any astronomer. This is to suit the William Optics focusers with microfocuser. The unit only fits the focuser as per the image.
These amazing units from JMI are battery operated hand controls 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.