ZWO EAF Pro Electronic Focuser

ZWO EAF Pro – Precision Focus, Now Fully Wireless

ZWO took everything users loved about the original EAF and gave it a serious upgrade. The new EAF Pro builds on the proven performance of ZWO’s electronic focuser with a suite of smart enhancements—including built-in Bluetooth, an internal battery, and manual focus buttons—all packed into the same compact, metal-bodied form factor. Whether you’re fine-tuning a high-end imaging train or want a wireless, cable-free solution for your visual setup, the EAF Pro delivers.

Freedom from Cables – Wireless Control + Built-In Power

The EAF Pro introduces two major quality-of-life improvements: Bluetooth 5.0 connectivity and a built-in rechargeable battery. That means no more USB tethers or external power sources required—just power it on and go. The 2500mAh lithium battery lasts up to a week under typical use and charges via USB Type-C when it’s time to top off.

You can now control your focuser completely wirelessly through:

• The ASIAIR app

• ASIStudio

• Or any ASCOM-compatible application that supports Bluetooth communication

Whether you’re imaging on your back patio or deep in the field, the EAF Pro simplifies your rig and reduces the risk of cable snags or power complications.

Manual Focus Buttons Built In

Need to tweak focus by hand? The EAF Pro includes integrated IN and OUT buttons right on the housing—no need for a separate hand controller. This is perfect for visual astronomers or anyone swapping gear mid-session. The buttons offer responsive, vibration-minimized input for manual adjustments without a screen or app.

Micron-Level Accuracy and Heavy Lifting

Like the original EAF, the EAF Pro is powered by a custom high-precision stepper motor with a 1:128 reduction ratio, delivering micron-level precision and excellent torque. It easily handles payloads up to 11 lbs (5 kg), making it more than capable of moving a filter wheel, large camera, rotator, and more—without backlash or slippage.

Works with Nearly Everything

The EAF Pro is plug-and-play with most modern astrophotography software. You can run full autofocus routines, temperature-compensated focus shifts, and refocusing after filter changes or meridian flips through:

• ASIAIR App

• ZWO ASIStudio

• ASCOM & INDI-compatible software like NINA, SharpCap, FireCapture, FocusMax, TheSkyX, Maxim DL, and more

Smart Features Built In

• USB Type-C port for power and optional wired control

• Bluetooth 5.0 wireless control

• Internal 2500mAh rechargeable battery

• Manual focus buttons (IN/OUT)

• LED status indicator

• Power switch

• Temperature sensor port

• Hand controller port (optional controller sold separately)

Specifications:

• Dimensions: 41mm x 52mm x 73.4mm

• Weight: 258g

• Load Capacity: 11.02 lbs (5kg)

• Stepper Motor: 7.5° step angle, 1:128 reduction ratio

• Power & Communication: USB Type-C (5V 500mA), Bluetooth 5.0

• Battery: Internal 2500mAh lithium, rechargeable

• Compatibility: ASIAIR App, ASIStudio, ASCOM/INDI software

• Ports: Temperature sensor, hand controller

• Manual Buttons: Yes (IN/OUT)

Observing Tip:
If you're running a mobile or battery-powered rig, the EAF Pro is a game-changer. With no need for an external power source or computer connection, your field setup becomes cleaner, faster, and more reliable. Just mount, power on, and go.

Final Thoughts:
The ZWO EAF Pro brings precision autofocusing into the wireless age. With its internal battery, Bluetooth control, and built-in manual buttons, it’s the most versatile focuser ZWO has ever made. If you want the convenience of cable-free focusing with the reliability and accuracy of a proven stepper motor design, this is the one to get.