ZWO EAFN Electronic Automatic Focuser # EAFN

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Precision Focusing at Your Fingertips

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 compatibility and easy installation.

EAF

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.

EAF

5kg（11.02lbs） High Load Capacity

Astronomical observation equipment often requires the use of various heavy components. The ZWO EAF, despite its compact size, can support a high load capacity of up to 5kg（11.02lbs）, as rigorously tested in ZWO Laboratory. Its powerful performance ensures stable operation of a wide range of equipment, meeting diverse observation needs.

EAF

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

Support handle controller and manual focusing

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!

Connection

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 wodethe 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

EAF

For users of Takahashi, C8, and C11 telescopes:
The new EAF and EAF Pro is not fully compatible with the 5mm flexible coupling. We strongly recommend using the 4mm flexible coupling for proper installation.

What’s in the box？

Other Accessories

EAF-HC Hand Controller

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 J ) on capturing images!

The hand controller provides an easy method of focusing the telescope, featuring IN- and OUT-buttons, a 2-gear display, slow and fast speed rate control.

A “must-have” option for EAF users!

EAF-Sensor Temperature Sensor

ZWO EAF bracket for Takahashi Scope

(this part is defined as optional accessories for ZWO EAF)

Support List:

Takahashi FSQ85

Takahashi FSQ106 (except for the first generation)

Takahashi TOA-130NFB

Mechanical diagram：

What’s in the box?

ZWO EAF Bracket for Celestron C8/C9.25/C11/C14

(this part is defined as optional accessories for ZWO EAF)

This bracket is designed to work with C8, C9, C11 and C14 the Celestron SCT scopes. You can directly connect it to the scopes without using the feather touch focusers.

It is CNC milled from an aircraft graded aluminum block. Quality reliable.

The detailed supported list:

Mechanical Diagram：

*  The current 5mm flexible coupling is compatible with the older version of the EAF when used with Takahashi, C8, and C11 telescopes. However, it is not fully compatible with the new EAF and EAF Pro and is not recommended for use with them.

What’s in the box?

1. For Celestron C8 and C9.25

Flexible coupling x1

Motor bracket x1

M4-8mm x2

M3-14mm x3

2. For Celestron C11 and C14

Flexible coupling x1

Motor bracket x1

M4-8mm x2

M3-35mm x3

M4-35mm x3

Tax
The price list on our website is USD without tax
Please note that buyers are liable to pay tax involved, such as Import tax, VAT , customs handling fee, etc. The additional fees may be collected at time of delivery by courier.

Warranty and Return Policy
We provide 2-year warranty for our products, we will offer the repair service for free within warranty period. After the warranty period, we will continue to provide repair support and service on a charged basis. We do not provide any replacement unless ZWO confirmed the product is DOA (Dead On Arrival).
This warranty does not apply to damage that occurred as a result of abuse or misuse, or caused by a fall or any other transportation failures after purchase.
Customer must pay for shipping when shipping the camera back for repair or replacement. If we confirm you can get a replacement, goods must be returned with all accessories, instructions, etc and must be suitably packed.
If you get a faulty camera, Please contact us as soon as possible. Please describe the problem in detail and we will do our best to help you solve the problem. Most instances perceived problems are simply bad driver install or software configuration.

Drivers and Softwares:

Our website has newest camera drivers and many DSO and Planetary capture softwares. Please make sure the newest driver and software has been installed before you start shooting: