ZWO Electronic Automatic Focuser (EAF)
ZWO Electronic Automatic Focuser (EAF)ZWO Electronic Automatic Focuser (EAF)ZWO Electronic Automatic Focuser (EAF)
ZWO Electronic Automatic Focuser (EAF)ZWO Electronic Automatic Focuser (EAF)

ZWO Electronic Automatic Focuser (EAF)

  (5 Reviews)
✓ 2 year warranty


Usually shipped 7-10 working days.
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About this product

Model:  zwo_eaf
Part Number:  ZWO-EAF-S

New ASCOM compliant auto-focuser for your telescope.

Introducing the new EAF, the latest innovation from ZWO. This electronic focuser enables precise, dynamic focus control for your imaging.

Available in two versions, a standard version with the EAF, flexible coupling, motor bracket and USB 2 cable and an advanced version which also includes a hand controller and temperature sensor. The Advanced version is due for release in August 2019.

Compatible with the ASIAIR.

A wide range of adaptors are under development - currently supported focusers include:

  • SkyWatcher Astrophotography Reflectors, SkyWatcher Black Diamond, SkyWatcher Dobsonians, SkyWatcher Maksutov-Newtonians.
  • Feather Touch
  • SkyRover, SharpStar, TS Optics and Astro Tech

With an optional adapter the following Takahashi and Skywatcher Esprit telescope focusers are supported:

  • Takahashi TSA120
  • Takahashi FS60
  • Takahashi FSQ85
  • Takahashi FSQ106
  • Esprit 100
  • Esprit 120
  • Esprit 150


  • Size: 60mm x 50mm x 40mm
  • Power port: 12v DC 5.5mm x 2.1mm, centre positive
  • Step motor, 35mm diameter, 5760 steps to rotate a circle
  • Data port: USB2
  • Weight: 277g
  • Capacity: 5kg


Mechanical Diagram

Whats in the box..

Customer reviews

Average Rating (5 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
ZWO EAF - Brilliant
Friday, 6 March 2020  | 

Compatible with lots of different focusers, easy to install on the ED72 and a GSO SCT (my testing so far) with many attachment options included. extremely good fine control, tested with Nina and Ascom. So good I bought a 2nd one.

Rating (max 5):  
Great experience
Tuesday, 4 February 2020  | 

I bought this along with some other equipment after an online discussion with FLO. They responded very quickly and efficiently to my questions and once this (along with three other items) was ordered it arrived very quickly and was packaged very securely. Would recommend FLO with no problem

Rating (max 5):  
Works well
Monday, 9 December 2019  | 

Seems to work well with SGP and my WO73. It consistently produces excellent focus and fitting was easy. I will be adding them to my other OTA's in time.

Rating (max 5):  
Tuesday, 29 October 2019  | 

Nice little focuser easy to attach to the scope and easy to operate via the ASiair controller. If you want to automate your system then this is ideal. Thanks FLO for a speedy delivery.

Rating (max 5):  
Wednesday, 2 October 2019  | 

Bought this back in July, fitted with no problem to a William Optics GT71.
Works perfectly well and was the ideal solution to focusing for me.


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