4tronix Focus RFU Remote Control with ASCOM Driver for Focus Motors

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Focus RFU - Remote Control for Focus Motors

This product is designed to directly replace the handset in the Skywatcher Autofocuser kit and is the next step for our Focus RF unit, as this version has:

  • USB interface
  • Socket for our temperature probe
  • ASCOM focuser driver software
  • Software application to configure and control the focuser
  • Ability (with optional adaptor) to control stepper motor focusers as well as DC motors

It allows you to focus the telescope remotely from up to 20m away, without any trailing wires that will always wobble the telescope a little while you are trying to focus.

Extremely simple operation with 8 buttons arranged in 4 rows of 2. The top 3 left buttons turn the focus one way and the top 3 right right buttons turn it the other way. The buttons at the top are slowest, down to the fastest ones at the bottom. Buttons 7 and 8 select "Continuous" or "Step mode".

Also consider using our Short Cable instead of the stock Skywatcher autofocus cable

A short customer video of the FocusRF is >HERE<


  • DC Jack (2.1mm, centre positive) for 12V external PSU (not included)
  • Outputs via RJ22 connector
  • Reverse polarity protected
  • Operating voltage range: 9V to 14V
  • Current in standby: 28mA
  • Maximum motor drive current: 1A
  • Red indicator (slow flash) for power on
  • Green indicator for RF activity
  • Dimensions: 66 x 66 mm


In the Box:

  • Focus RFU unit
  • Remote controller
  • USB A to B cable
  • DC Jack Splitter cable
  • DC Jack Extension cable
  • USB Memory stick with software, user guide, etc

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