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NEW ZWO 5V EAF - Electronic Automatic Focusmotor

NEW ZWO 5V EAF - Electronic Automatic Focusmotor
 Choose Package: EAF OnlyChoose Package: EAF and Hand ControllerChoose Package: EAF, Hand Controller and Temperature Sensor 

In Stock Now!

Price:  £190.00(Inc. 20% VAT)

Product Code:  ZWO-EAF-5V
Brand:  ZWO

ZWO EAF Bracket for Celestron SCTsZWO EAF Bracket for Celestron SCTs
ZWO Sky-Watcher Esprit  / Takahashi Bracket for EAFZWO Sky-Watcher Esprit / Takahashi Bracket for EAF
ZWO Hand Controller for the ZWO Electronic Automatic Focuser (EAF)ZWO Hand Controller for the ZWO Electronic Automatic Focuser (EAF)
ZWO Temperature Sensor for the ZWO Electronic Automatic Focuser (EAF)ZWO Temperature Sensor for the ZWO Electronic Automatic Focuser (EAF)
  (1 Review)


ZWO EAF - Electronic Automatic Focusmotor 

Introducing 5V EAF, this electronic focuser, like its previous version, enables precise, dynamic focus control for planetary and deep-sky imaging, while only connected with 5V USB..

DSC_3649-2       DSC_3654

  • Highly integrated design
  • Support ASCOM platform and various ASCOM-compatible third-party software
  • Support INDI
  • Support original software such as ASIAIR and ASIStudio
  • Support automatic focusing for DSO imaging
  • Support handle controller and manual focusing
  • Support temperature sensor
  • USB HID device and drive-free
  • Stable and durable

Compared to its old version, the main change of 5V EAF is to remove the 12V power supply port. Now you can directly connect it to your camera, laptop or ASIAIR PRO via the USB 2.0 port & cable for both data transmission and power supply. This would not only make the cable management much easier, also effectively reduce the supply pressure.

The innovative decorative pattern on the EAF is inspired by the changes of Airy disk during focusing and the focusing curve, which makes it clear at a glance how this focuser works.

There are two variants of the 5V EAF:
Standard Version: EAF body, flexible coupling, motor bracket, USB2.0 cable.
Advanced Version: EAF body, flexible coupling, motor bracket, USB2.0 cable, hand controller, temperature sensor.
You could purchase the standard version first, and then buy other accessories to upgrade.

The casing of the hand controller uses environment-friendly ABS material.  It has a 3.5mm female socket. You will have a very comfort grip when you touch its ergonomic design! The hand controller provides an easy method of focusing the telescope, featuring IN and OUT buttons, a 2-line display, slow and fast speed rate control. A “must-have” option for EAF users!


Support list:

  • SkyWatcher Astrophotography Reflectors, SkyWatcher Black Diamond, SkyWatcher Dobsonians, SkyWatcher Maksutov-Newtonians.
  • SharpStar telescopes,
  • SkyRover telescopes,
  • TS Optics,
  • Astro Tech,
  • Feather Touch,
  • More focuser will be supported in the further. such as TAKAHASHI telescopes, GSO telescopes.

ZWO EAF Compatible Focuser List & Connecting Methods

Connecting Digram:

EAF connection 


  • Size: 59mm x 52mm x 41mm
  • Moter: Step moter, 35mm diameter, 7.5° step angle
  • Reduction ratio: 120
  • Power/Data port: USB2.0 port, Type-B
  • Weight: 277g
  • Capacity: 5kg

Mechanical Digram:


What's in the box:


ZWO EAF Compatible Focuser List & Connecting Methods


  • Size: 59mm x 52mm x 41mm
  • Moter: Step moter, 35mm diameter, 5760 steps to rotate a circle.
  • Power port: 12V DC 5.5mm x 2.1mm, center positive
  • Data port: USB2.0 port
  • Weight: 277g
  • Capacity: 5kg

Average Rating (1 Review):  
Write a Review and share your opinions!

Used for SCT AstroFi 5"
Tuesday, 28 September 2021  | 

5" Celestron is viewed like the black sheep - too small to be supported by various accessories. That also applies to the "ZWO EAF Bracket for Celestron". With a bit of L-profile Aluminium and changing the mounting screws of the focusing knob the ZWO got attached to the Optical Tube. I gave a drawing to a friend who created a 13mm tube to 7mm shaft reduction coupling on a 3D printer and the problem was solved.
The ZWO EAF was tested last night and got five stars for the smooth rotation of the focusing knob.
(1) Even at the largest magnification or using the CMOS camera with a Barlow x2, the image does not move at all (or flicker) while activating the Hand Controller. While one could hear a slight whirling sound, the OT is perfectly stable.
(2) The Hand Controller is simple, easy to use even in the dark and the two speeds are both useful when changing between eyepieces and camera or when fine-focusing. (3) The 5V power requirement comes very handy, either attached to the laptop that records the images or to the battery bank supplying the laptop and the telescope.
(1) The weight of 288 g at about 10cm from the OT puts a bit of momentum but it still worked fine.
(No other cons!)
Good product and very useful when trying to focus without touching the telescope (to prevent the image shaking) or when attempting Astrophotography.

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