ZWO Standard Electronic Automatic Focuser (EAF) 5V Advanced Set

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A great solution for your focusing needs.
Our Product #: EAF-A
ZWO Product #: ZWO EAF-A

Product Description

The ZWO EAF provides precise focus control for all your imaging needs.  In April of 2021 ZWO introduced this new 5 Volt version.  The new 5v electronic focuser, like its previous version, enables precise, dynamic focus control for planetary and deep-sky imaging, while only connected to a 5V USB-port.

Compared to the old version of the EAF focuser, the main change of the 5V EAF was to eliminate the need for a 12V power supply port. Now you can directly connect it to your camera, laptop or ASIAIR PRO via the USB 2.0 port and use a cable for both data transmission and power supply! This makes the cable management much easier, as well as reducing the need for additional power outlets.

The ZWO EAF works with all capture software that is supported by the ASCOM platform.  The EAF works in perfect harmony with the ASIAIR Pro WiFi module allowing you complete control over your imaging rig.  You can run it indoors from your smartphone or tablet if you desire.

The metal body has a 12V DC 5.5mm x 2.1mm center positive power port and a USB 2.0 port.

The Advanced set includes the handcontrol and the temperature sensor.

The casing of the hand controller uses environment-friendly ABS-material.  It has a 3.5mm female socket. The design aims at giving you the best ergonomic grip, so that you focus (pun intended) on capturing images!

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!

Current supported instruments.

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


  1. Highly integrated design
  2. Support ASCOM platform and various ASCOM-compatible third-party software
  3. Support INDI
  4. Support original software such as ASIAIR and ASIStudio
  5. Support automatic focusing for DSO imaging
  6. Support handle controller and manual focusing
  7. Support temperature sensor
  8. USB HID device and driver-free
  9. Stable and durable


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


Tech Details

Weight 9 ounces
Warranty 2 years


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