ZWO EAF Pro Electronic Automatic Focuser, Red

SKU: ZWEAFPRO MFR: EAF PRO
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Key Features

  • Achieve pinpoint precision with automatic focusing, perfect for astrophotography.
  • Experience seamless control through USB Type-C or Bluetooth connectivity for ease of use.
  • Enjoy reliable performance with the built-in battery, ensuring uninterrupted observation.
  • Benefit from broad compatibility with ZWO ASIAIR and ASCOM platforms for versatile setups.
  • Monitor temperature changes with the integrated sensor, enhancing focusing accuracy.
  • Effortlessly manage your telescope's focus with intuitive power and focus buttons.
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Temporarily On Backorder?Expected Availability: 05/2026
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Review Summary

ZWO EAF Pro 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/Bluetooth

  • Power Supply

    USB Type-C (5V 500mA)
    Built-in Battery

  • Battery

    Yes

  • Focus Button

    Yes

  • Power Switch

    Yes

  • Status Indicator Light

    Yes

  • Temperature Sensor

    Hand Controller Interface: Yes

  • Software

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

  • Battery Info

    Required, included

  • Battery Material

    Lithium ion

  • Battery Type

    Non-universal

  • Battery Quantity

    1

  • Dimensions

    1.61 x 2.05 x 2.89" (41 x 52 x 73.4mm)

  • Weight

    9.1 oz (258g)

  • UPC Code

    6977641321990

About ZWO EAF Pro

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 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.

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 ASIAIR, it also supports wired communication via a Type-C interface. Simplifying cable management and reducing power load.

Wireless Bluetooth Control
The EAF Pro features a built-in low-power Bluetooth 5.0 chip, enabling wireless connectivity with ASIAIR and smart cameras. It is fully compatible with ASIAIR APP, ASI Studio, and ASCOM platform software - offering flexible and cable-free focus control.

When used with ASIAIR, the EAF Pro is compatible with the ASIAIR Plus (RK version) and the entire ASIAIR camera lineup. It is not compatible with the following models: ASIAIR (1st generation, Raspberry Pi 4) ASIAIR Pro ASIAIR Mini ASIAIR Plus (CM4 version)

Note: There are two versions of the ASIAIR Plus. You can identify the version by the IC number on the device: Suffix "ASIAIRPLUS" indicates the RK version (compatible) Suffix "RPICM4" indicates the CM4 version (not compatible)

Built-in Lithium Battery
Powered by an integrated lithium battery, the EAF Pro frees you from external power constraints and enables truly wireless operation. It offers greater flexibility and ease of use to meet diverse needs.

Integrated Focusing Button
The EAF Pro features integrated focusing buttons on its body, allowing users to make quick and precise adjustments even after installation. This design greatly enhances usability and flexibility, enabling seamless focusing across a variety of observing and imaging scenarios.

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 EAF Pro Features

  • Upgraded Universal Type-C Interface
  • Micron-Level Precision Focusing
  • 11.02 lbs (5kg) High Load Capacity
  • Built-in Focus Adjustment Knob
  • Bluetooth Connectivity
  • Built-in Battery Power Supply

Key Features

  • Achieve pinpoint precision with automatic focusing, perfect for astrophotography.
  • Experience seamless control through USB Type-C or Bluetooth connectivity for ease of use.
  • Enjoy reliable performance with the built-in battery, ensuring uninterrupted observation.
  • Benefit from broad compatibility with ZWO ASIAIR and ASCOM platforms for versatile setups.
  • Monitor temperature changes with the integrated sensor, enhancing focusing accuracy.
  • Effortlessly manage your telescope's focus with intuitive power and focus buttons.

What's in the box:

  • ZWO EAF Pro Electronic Automatic Focuser (Red)
  • Standard Bracket
  • 2m 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