4tronix FocusRF - Remote Control for DC Focus Motors
4tronix FocusRF - Remote Control for DC Focus Motors4tronix FocusRF - Remote Control for DC Focus Motors4tronix FocusRF - Remote Control for DC Focus Motors

4tronix FocusRF - Remote Control for DC Focus Motors

  (12 Reviews)
✓ 2 year warranty


5x in stock shipped 1-2 working days

About this product

Model:  4tronix_focusrf
Part Number:  FOCUSRF

FocusRF - Remote Control for DC Focus Motors

This product is designed to directly replace the handset in the Skywatcher Autofocuser kit.

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. All the left buttons turn the focus one way and all the right buttons turn it the other way. The buttons at the top are slowest, down to the fastest ones at the bottom.

The FocusRF is microprocessor controlled and can be configured to use multiple remote units, and you can even adjust the minimum speed that it reaches (this will depend on your power supply or battery, as well as the actual motor you are using).

Power can be provided from a 9V PP3 battery (not included), or an external supply (not provided) which should be between 7V and 13V, 2.1mm tip DC Jack with centre positive.

 See the 4tronix blog for details of configuration etc.

What's in the box

  • Control Box
  • Remote Control


  • Power by 9V PP3 battery (not included) or external PSU (not included)
  • Outputs via RJ22 connector
  • Reverse polarity protected
  • Operating voltage range: 7V to 13V
  • Current in standby: 28mA
  • Maximum motor drive current: 1A
  • Red indicator (slow flash) for power on
  • Green indicator for RF activity
  • Dimensions: 66 x 90 mm

Customer reviews

Average Rating (12 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
03 June 2024  | 

Quick delivery and excellent product, not much more I can say really.

Rating (max 5):  
4tronix FocusRF
07 June 2023  | 

Great little gadget. The stock one from Skywatcher has the one little (big) problem regarding the battery compartment. This one is build to last.
Great product, great service. Thumbs up

Rating (max 5):  
Excellent Upgrade
12 May 2023  | 

The 4Tronix FocusRF unit is an excellent upgrade of the Sky Watcher remote focus unit allowing hand held focus control away from the mount.

Rating (max 5):  
Remote control
07 March 2023  | 

Excellent quality recommend

Rating (max 5):  
Excellent dc controller
24 December 2022  | 

I was very pleased with this purchase to enhance my previous dc focus motor purchase. Its not documented but the range is very impressive. It wotked well from 8m away through a brick cavity wall. Downloaded documents from 4tronix is comprehensive.

Rating (max 5):  
13 July 2022  | 

Great little addition to my Skywatcher electric focuser. Works well both with a battery and also with my mains supplied 12V. Speed is selected by whichever pair of buttons you select out of a choice of four pairs . The range of the controller is impressive and functions effortlessly. The unit has an On/Off switch which is also a plus, especially if running the unit on battery power.

Rating (max 5):  
Brilliant, once I got it going
10 May 2022  | 

I bought this controller to replace the hand control unit for the Skywatcher electronic focuser, which I have attached to my Skywatcher Dobsonian.
The standard hand control unit that comes with the electronic focusser was pretty awful in my opinion, not well made, no off switch, very patchy quality, no mains option and the 9v battery was a pain to fit with very delicate wires.
So this RF controller seemed to solve all the problems.
Except at first it didnít. I could hear it hum so it was on, but no lights showing and not working. ďHere we go again with skywatcher electronicsĒ I thought.
Then I read the blog link in the product description and it describes sometimes doing a reset. So I opened the unit and before doing the reset found the daughter board wasnít properly pushed into the motherboard. A small wiggle and it started working. Itís now working like a dream, fine focus is excellent. Iíve used it 4 times on the moon so far for viewing and imaging and itís perfect.
Great service from FLO as ever, they offered to replace the unit immediately, but luckily didnít need to.
If you want to replace the focuser on your skywatcher classic dob to give you fine focus, this unit plus the motorised focuser is a great option. Or you could fit the manual 2 speed focuser from skywatcher.

Rating (max 5):  
4tronix FocusRF
18 February 2022  | 

I recently bought this new 4tronix focusrf to replace my old sky-watcher autofocuser , not ad change to fit on my focuser, looks an awesome piece of kit , yes i have tried it without been on my focuser works perfectly,
cannot wait to fit it and try it out, the staff at FLO do not let the grass grow under their feet, always 5 stars

Rating (max 5):  
Excellent upgrade for your focuser.
24 January 2022  | 

I recently fitted one of these remote controllers to my 200P and I am very impressed with its performance. Being able to use a 12volt supply it now runs at four different speeds which is a great improvement on the original slow to very slow controller. Well worth the modest price IMO.

Rating (max 5):  
It works
21 December 2021  | 

I've not had chance to try it at night yet, but it works as described with the SW focus motor. It has an ON/OFF switch so you shouldn't have to take the battery out between sessions, unlike the original, wired controller. So far, so good!

Read all 12 customer reviews...


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