Stepper Motor Focus

Pegasus Astro Stepper Motor Focus Controller
Focus fast, reliable and accurate your telescope using a stepper motor and this controller.

The evolution of technology in astronomy requires a system which will assist the focusing of the telescope with great accuracy. Fast optics and modern camera devices require automatic focusing in every small period of time as temperature can affect focal length and modify the optimal focus position. Pegasus Stepper Motor Focus Controller (SMFC) has been developed to meet these requirements.

Designed in high quality with modern electronics it can provide digital precise control of compatible motor focusers from a PC. SMFC is suitable for astro-photographers.. It can drive unipolar stepper motors for absolute position focusing. SMFC designed in a very compact size and weight. Suitable to attach it near your telescope mount plate.


Compatible DB9 connector pin out

Motor output is fully compatible with “Robofocus or Moonlight Motors” pin out.


Temperature compensation

An external digital temperature sensor input is located near the motor connector. The digital probe of length of one (1) m is supplied. The probe can be placed near the focuser so the exact temperature of the focuser / environment can be seen through the supplied software or ASCOM driver


ASCOM support

The controller is fully compatible with ASCOM 6.


Standalone program supported

The controller can be operated by the standalone DMFC software. (Only available for Windows)


USB cable included

A 1.8m USB Type B cable is included in the standard package.

Firmware upgrade support

Controller firmware supports reprogramming via the USB 2.0 connection using upgrade software, for future upgrades which may become available.

1 Year warranty

For the controller device including the temperature sensor.

Compact size

66 x 66 x 28 mm


High Resolution Stepper with Black Universal Bracket & Coupler  (focuser is not included)

Supplied Motor is a high resolution geared stepper motor (Step Angle 7.5, Deg 120, Gear Ration 1:120). Its gearbox has very low backlash and high torque suitable to focus in micron scale.


High Resolution Stepper with Black Universal Bracket & Coupler (focuser is not included)


dmfc_motor4 dmfc_motor3 dmfc_motor2


Motor Coupler

Supply Voltage 12V DC
Motor Compatibility Only Unipolar stepper motors
Motor Output Unipolar stepper motors, max 1.6 Amps (0.8 Amps per phase)
Stepper motor in Premium package has following specifications:High Resolution Stepper Geared Motor (Step Angle 7.5° / 120, Gear Ratio 1:120)
USB Connectivity USB 2.0 Type B plug
Thermal Sensor Resolution 9-bit Celsius temperature measurements
Power Input Connector 2.1mm Centre Positive Socket
Motor Connector D Sub 9 female connector
Dimensions 66 mm x 66 mm x 28 mm

Standard Package

  • Stepper Motor Focus Controller
  • Temperature Sensor 1m length
  • USB type B cable

Order Premium Package

  • Stepper Motor Focus Controller
  • Temperature Sensor 1m length
  • USB type B cable
  • DB9 male to DB9 female cable for stepper motor connectivity (1.8m)
  • Cigarette Lighter Adapter cable
  • High Resolution Stepper Geared Motor (Step Angle 7.5° / 120, Gear Ratio 1:120)
  • Motor Coupler (5mm on one side,  8mm on other side hole)
  • Universal Black Anodised Aluminium (L shaped) Bracket for Motor

Motor kit Installation howto on different focusers

Check our dealers