Brand: ZWO

ZWO EAF 5V Electronic Automatic Focuser (ZWO-EAF-5V)

ZWO EAF-5V

Brand: ZWO

ZWO EAF 5V Electronic Automatic Focuser (ZWO-EAF-5V)

ZWO EAF-5V

The ZWO electronic auto focuser (EAF) is sure to improve your astrophotography sessions with pin-point stars. It's a great little package that can be installed on virtually any telescope.
  • 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 driver-free
  • Stable and durable
$149.00 USD

Easy Payment Options with .

$149.00 USD

Easy Payment Options with .

Free Expert Support
Stress Free, Secure Shopping
30 Day Return Policy
Price Match Promise
Why We Love It Full Details Specifications Reviews and Questions Articles, Videos, Software, Links

Why we love the ZWO EAF 5V Electronic Automatic Focuser (ZWO-EAF-5V)

The 5V EAF (ZWO-5V-EAF) automatically focusses your telescope for planetary and deep-sky imaging, while only connected to a 5V USB-port.  The EAF has several accessories available for it including a temperature sensor, a hand controller, and adapters for a number of optical tubes.  The EAF works seamlessly with other ZWO products, the ASIAIR will even allow you to control it with your phone.  These are a great device for new and experienced astrophotographers.  

Recommended Accessories

The EAF has a few accessories available for it.  The three that we really like pairing it with are:

1. The EAF Hand Controller will allow you to remotely adjust the focus of your telescope.

2. The Temperature Sensor for the ZWO EAF lets you automatically refocus based on changes in temperature. 

3. The ZWO ASIAIR isn't specifically an accessory for the EAF, but it does allow for easy integration and management of the EAF in your imaging system.  

These accessories can help you get the very best out of the ZWO EAF.

Product Description

This is the current version of the EAF. It no longer requires a dedicated 12V power supply. Now you can directly connect it to your camera, laptop or ASIAIR 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 innovative decorative pattern on the EAF is inspired by the changes of Airy disk during focusing showing how the focusing curve gives a local minimum at best focus – giving an easy explanation on how the EAF works just with a glance on the cover!

Specifications

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

Customer Reviews

Based on 48 reviews
96%
(46)
4%
(2)
0%
(0)
0%
(0)
0%
(0)
K
K.A.
Love it

This is my second EAF purchase from All-Star Telescope.
I recently upgraded my Celestron C8 setup with the ZWO EAF 5V, and it has been a game-changer. From the moment I unboxed it, I was impressed by its solid build quality and thoughtful design. Installation was straightforward—ZWO includes everything you need, and the clear instructions make it easy to attach to a variety of focusers. Within minutes, I had it up and running.

What truly sets the EAF 5V apart is its smooth, precise focusing. Gone are the days of guesswork at the eyepiece or squinting at star shapes on my screen. Now, with just a few taps in my imaging software, the EAF automatically dials in pinpoint focus, even after temperature shifts or filter changes. It’s incredibly satisfying to watch the stars sharpen in real time without having to touch the scope.

The quiet operation and reliable performance throughout each imaging session have given me greater confidence in my setup. Paired with my ASIAIR or my Stellarmate, the EAF integrates seamlessly for fully automated focusing, saving me time and frustration.
Overall, the ZWO EAF 5V is well worth the investment for anyone looking to streamline their astrophotography workflow. It adds convenience, consistency, and professional-level precision to your imaging sessions. If you’re serious about capturing the best possible data, this electronic focuser is a must-have upgrade.

B
B.C.
Zwo EAF

Great piece of kit, easy install and worked right away with next to no effort. Highly recommend.

R
R.D.
ZWO EaF

Comme toujours, ZWO offre un produit de qualité. Il a été très facile d'installer l'EAF sur mon Redcat 61 et le backlash est nul. Très satisfait.

B
B.T.
ZWO EAF 5V Electronic Automatic Focuser (ZWO-EAF-5V)

Excellent device, easy to install and configure the backlash. Sales support was amazing, fast at responding and recommending solutions.

M
M.
Great product

I mounted this focuser on my Askar 107 PHQ telescope. It was very easy, taking no more than five minutes. It operates beautifully in conjunction with the ZWO ASIAir. The auto focus is phenomenal. The telescope was WAY out of focus, and I was having a hard time finding it. The ASIAir offered to help and focused it for me. I don't yet have a Bahtinov mask for the 107 PHQ, but the autofocus was so precise I was able to guide and shoot with no further adjustments. This is a great product.

Why Should You Trust All Star Telescope?

We've Made All The Mistakes
So You Don't Have To

Learn More