Rigel Systems
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DC Focus Motor Kits

nFOCUS motor controller provides the ultimate in accurate focusing. nFOCUS is the affordable way to get high precision fine focusing without vibration for visual and astro-imaging!   nFOCUS motor controller provides the ultimate in accurate focusing. nFOCUS is the affordable way to get high precision fine focusing without vibration for visual and astro-imaging!


Low speed is adjustable pulse width modulated (PWM) drive, providing full voltage torque for reliable low speed operation on every button press. Press a second button down while holding the first button down and nFOCUS digital logic control switches to high speed drive, to get you to focus quickly.


nFOCUS avoids the problems with the focus motor controllers which adjust voltage to adjust speed and thereby don't have the umph to even turn the motor over at low speed. The nFOCUS whacks the motor with a full 12 volt, short duration pulse to overcome stiction at low speed operation, providing plenty of umph!


It is amazing to see nFOCUS work, to see the focus change step by step till it's just right. No more coasting past then back past then past focus again. Uses 3 AA batteries (included) for long life.   Compatible withJMI, Celestron, MEADE LX200GPS microfocuserMoonlite  DC focus motors.

Don't have a focus motor? Motorize your focuser with our high torque 12V DC motor driven out powerful nFOCUS controller. Just check our gallery to the right for popular ones we do kits for -->


Got a focuser that's not in our gallery?   We've done over 100 different types and variations including Williams Optics, Takahashi, Coronado,   JMI, Astro Tech, Baader, Borg, Cave, Meade, Skywatcher, Tectron, TMB, Vixen, Cave, Zhumell. With a couple of photos and a few simple measurement we can craft a STEPPER focus motor kit that will fit yoru focuser at no additional cost. E-mail us at rigelsys0@gmail.com and we'll get it started.  


PC Adapter

Computerize your nFOCUS to focus from your PC


USB-nFOCUS adapter connects your nFOCUS to your PC for easy remote operation of your focuser. All the great features of nFOCUS (see above) now available from your computer! Fully ASCOM compliant so it will work with popular focus control programs. Full step size and interval control from computer and display of step count. Computer control , doesn't affect manual operation (doesn't change your favorite nFOCUS manual pulse width/interval settings). USB and nFOCUS cables included. Software drivers for Windows xp/vista/7/8/9/10/11.  Full step control from computer and display of step count, Supports relative focusing, forward and reverse direction. Store five positions for major changes in focus (e.g., camera1 to camera2 to eyepiece type '1' to eyepiece type '2'). Just focus once and save the position and a label for later 'GoTo' .

nFOCUS Temperature Sensor


Telescopes change focus as temperature changes expand/contract the length of the telescope tube as temperature increases/decreases. Adding the external temperature sensor to the usb-nFOCUS adapter allows your autofocus software to and automatically compensate for these temperature changes. Unlike internal temperature sensors located inside the controller that are affected by the heat generated by the electronics, the external temperature sensor can be attached to the telescope to get a more accurate measurement of the ambient temperature.


Buy nFOCUS & motor kit & usb-nFOCUS at the same time on our website and we'll include the temp sensor free.



nFOCUS $71.95 


nFOCUS + 12V DC 

Focus Motor $189.90

Select Telescope Focuser
Telescope Size


USB-nFOCUS Adapter $71.95


Temperature Sensor $19.95

nFOCUS includes


  1. nFOCUS controller 
  2. DC Motor Cable
  3. Instructions


DC Motor includes


  1. 12V DC focus motor
  2. Focuser Bracket and Gear kit
  3.  Instructions


usb-nFOCUS includes


  1. usb-nFOCUS controller
  2. usb-cable
  3. usb-nFOCUS to nFOCUS Cable
  4.  Instructions




nFOCUS Manual


usb-nFOCUS Manual


usb-nFOCUS software for WINDOWS