Rigel Systems
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 AFFPORDABLE  Camera/Imager/Rotator/Framer featuring position accuracy and repeatabilty

Robust and rigid, the usb-nFRAME uses a high power stepper under control of our usb-nFRAME controller to assure angular accuracy and repeatability.  The usb-nFRAME software is fully ASCOM compliant for rotation control from higher level autofocus software as well as manually from your PC.

Natively M54 (female) threads on the telescope and camera sides, we can provide an adapter for M54 to M48 or M42 or other threads upon request to accommodate many quality field flatteners camera T adapters, T-thread spacers, off-axis guiders, filter wheels, imager. The usb-nFRAME adds a mere 21mm to the length to your imaging stack.


  • Robust ASCOM drivers for Windows
  • Angle positioning by PC from -10 to +370 degrees
  • Go To Angle plus 5 user defined stored positions
  • Rigid design avoids flexure as powerful stepper motor ensures angular accuracy and repeatability
  • All necessary usb, Stepper, and power cables included in the package.

Very easy to operate via ASCOM drivers or higher level apps to automatically adjust with precision your camera field with precision. Interfacing with the computer is extremely simple. Just plug in the USB, 12VDC and Stepper cable, let Windows install the drivers, open up the usb-nFRAME ASCOM app to connect and start using your rotator. Anti-cable wrapping at the firmware level for positive assurance.

usb-nFRAME $379.95


Semi-custom Adapters available at nominal charge to fit a wide variety of focusers, field flatteners, off axis guiders, filter wheels, cameras.

Just drop us an e-mail to

What's included

  1. usb-nFRAME hardware 
  2. usb-nFRAME controller 
  3. USB PC cable
  4. usb-nFRAME stepper cable
  5. usb to 12V DC power cable
  6. Instructions


usb-nFRAME manual for WINDOWS


usb-nFRAME software for WINDOWS


(contains 1 file, msstdfmt.dll) Extract to
C:\Program Files (x86)\Common Files\ASCOM\Rotator
Then open an admin command prompt and register the dll

regsvr32 "C:\Program Files (x86)\Common Files\ASCOM\Rotator\msstdfmt.dll"