ZWO EAFN Electronic Automatic Focuser, Red

SKU: ZWEAFN MFR: EAFN
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Key Features

  • Achieve pinpoint focus with the ZWO EAFN Electronic Automatic Focuser, perfect for astrophotography.
  • Experience effortless control and precision focusing for your telescope with this advanced electronic focuser.
  • Seamlessly integrate with ZWO ASIAIR and ASI Studio for automated, accurate focusing every time.
  • Enjoy robust performance with a 1:128 reduction ratio stepper motor, ensuring smooth and reliable operation.
  • Its compact and lightweight design (7.58 oz) enhances portability, making setup and transport a breeze.
  • Benefit from USB Type-C connectivity for simple power and communication, streamlining your imaging sessions.
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Temporarily On Backorder?Expected Availability: 05/2026
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Review Summary

ZWO EAFN Specifications

  • Color

    Red

  • Payload

    11.02 lbs (5kg)

  • Motor

    Stepper motor
    Step angle 7.5 Degree
    Reduction ratio 1:128

  • Resolution

    Approx. 2.812 microm / per step

  • Communication Method

    USB Type-C

  • Power Supply

    USB Type-C (5V 500mA)

  • Battery

    No

  • Focus Button

    No

  • Power Switch

    No

  • Status Indicator Light

    No

  • Temperature Sensor

    Hand Controller Interface: Yes

  • Software

    ZWO ASIAIR APP
    ZWO ASI Studio
    ASCOM platform and various
    ASCOM-compatible
    third-party software

  • Dimensions

    1.61 x 2.05 x 2.77" (41 x 52 x 70.3mm)

  • Weight

    7.58 oz (215g)

  • UPC Code

    6977641321983

About ZWO EAFN

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

Compatibility Notice:
Due to the increased torque of the new EAF motor, higher power input is required. This exceeds the USB output capability of earlier ASIAIR, making it incompatible with the first-generation ASIAIR and the second-generation ASIAIR Pro. For stable operation, it is recommended to use the new-generation ASIAIR.

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
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.

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: ASI Studio and ASIAIR APP
• Third-party software: Sharp Cap, Fire Capture, 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!

ZWO EAFN Features

  • Upgraded Universal Type-C Interface
  • Micron-Level Precision Focusing
  • 11.02 lbs (5kg) High Load Capacity

Key Features

  • Achieve pinpoint focus with the ZWO EAFN Electronic Automatic Focuser, perfect for astrophotography.
  • Experience effortless control and precision focusing for your telescope with this advanced electronic focuser.
  • Seamlessly integrate with ZWO ASIAIR and ASI Studio for automated, accurate focusing every time.
  • Enjoy robust performance with a 1:128 reduction ratio stepper motor, ensuring smooth and reliable operation.
  • Its compact and lightweight design (7.58 oz) enhances portability, making setup and transport a breeze.
  • Benefit from USB Type-C connectivity for simple power and communication, streamlining your imaging sessions.

What's in the box:

  • ZWO EAFN Electronic Automatic Focuser (Red)
  • Standard Bracket
  • 6.56' USB 2.0 Type-C to A Cable
  • 4-4mm Flexible Coupler
  • 4-5mm Flexible Coupler
  • 4-6mm Flexible Coupler
  • 4-7mm Flexible Coupler
  • 5x 5mm Spacer
  • 4x M4x8 Cylindrical Head Hex Screws
  • 2x M5x10 Cylindrical Head Hex Screws
  • 2mm Hex Wrench
  • 3mm Hex Wrench
  • ZWO 2 Year Limited Warranty