My standard focus motors are designed for typical astrophotography needs, meaning that accuracy and high capacity (for heavy duty focusers and large cameras) are more important than speed.  But recently, a friend asked me to make a motor for visual use.  Using a focus motor for visual observing can actually be very helpful because it allows you to adjust focus without touching the telescope, thus avoiding the vibrations that generally happen when you touch a telescope.  The rotary knob on the PerfectStar family focus controllers makes for a very easy transition from direct focusing to motorized focusing.  Backlash compensation also […]