ZWO EAFN - Electronic Automatic Focusmotor with USB-C

Precision Focusing at Your Fingertips

Please note, this new EAF has got a 4mm shaft, therefore it is currently not compatible with the ZWO EAF Brackets for Celestron C8, C925, C11 and C14. 

There will be a new coupler to make it in compatible. We expect the additional coupler by the end of August. If you wanted an EAF for your Celestron SCT then please source an original EAF-5V. 

The new generation of ZWO EAF continues the brand's signature minimalist design, featuring a robust metal housing and precise angular lines — a perfect fusion of form and function. Available in two versions: EAF and EAF Pro — to suit different user needs.

EAF features a more universal Type-C interface for broad compatability and easy installation.

EAF Pro comes with a built in battery and Bluetooth connectivity, reducing power supply constraints.  It also includes manual focus buttons, allowing direct adjustment even after installation - offering maximum flexibility and convenience.  Both models deliver a more user-friendly focusing experience, achieving pinpoint focusing accuracy for breathtaking cosmic imagery.

Micron-level Positioning Accuracy

The ZWO EAF integrates a high-precision custom stepper motor with compact yet powerful performance. Featuring a 1:128 reduction ratio, it provides the motor with strong torque and precise control capabilities, achieving micron-level positioning accuracy. Each rotation responds precisely to commands, ensuring accurate and reliable focusing.

5kg（11.02lbs） High Load Capacity

[More Universal Type-C Interface
The EAF is an upgrade from the previous version, with its interface upgraded from Type-B to the more universal Type-C. Users can power the EAF directly via a Type-C connection to a camera,    computer, or ASlAlR, it also supports wired communication via a Type-C interface. Simplifying cable management and reducing power load.

Extensive Software Support

EAF supports both ASCOM and INDI protocols, making it compatible with a wide range of astrophotography software, including:
ZWO-developed platforms: ASIStudio and ASIAIR APP
Third-party software: SharpCap, FireCapture, Maxim DL, The SkyX, SGP, Nebulosity, and more
Also compatible with third-party focusing software such as FocusMax
 

The EAF hand controller is made of high-quality, eco-friendly ABS material to ensure a comfortable grip. The hand controller provides an easy method of focusing the telescope, featuring IN and OUT buttons, allowing for smooth manual focusing without relying on a computer or smartphone. This design also minimizes subtle vibrations during operation, helping to maintain precise focus. A “must-have” option for EAF users!

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Installation Steps

1. Remove the coarse adjustment knob of the telescope focuser using a suitable sized wrench.
2. Install the  coupling on the telescope focuser shaft and tighten the locking screw with the 2mm hex wrench.

 
3. Attach the focuser body to the coupling, align the EAF motor shaft flat surface with the locking screw, and tighten the locking screw using the provided 2mm hex wrench.

4. Secure the EAF body to the bracket and the bracket to the matching mounting holes  in the focuser assembly using the supplied M4 screws. Ensure that the bracket is flush with the EAF mounting surface without any gaps, and that it is parallel to the focuser body surface.
 

 
5. Check and ensure that all the connections of the EAF are secure. This completes the hardware installation of the EAF.

6. For curved focusers like the one in the image above, you only need to use the original locking screws and 3 washers to secure the EAF. There is a groove at the bottom of the EAF bracket, and a single screw provides sufficient stability.
 

Mechanical Diagram of EAFN

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