ZWO Standard Electronic Automatic Focuser (EAF) Pro

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Enhance Your Electronic Focus Experience with the EAF Pro!

Tackle focusing like a Pro with this streamlined adjustment assistant fromZWO! This electronic focuser attachment not only allows you to precisely dialin your initial focus, but also keep up with factors which can knock a wellcharted imaging session off course. Fluctuations in temperature, filterchanges, and sometimes Meridian flips, which can require you to set timers ormonitor manually can now be automated with this powerful accessory and mostmodern software suites and WiFi control equipment available today. Thisautomation helps ease your imaging routine,giving you more confidence that you can walk away from your astrophotography system and still wake up to a night’s worth of sharp images. Pair the EAF Pro with your ZWO ASIAir, ZWO Air Camera, or computer runninga compatible ASCOM or INDI software suite, initiate auto-focus, and watch astoday’s complex focusing algorithms adjust your focuser for pinpoint stars;then turn on per exposure, per period of time, per change in temperature, orper filter refocusing, and relax while the EAF Pro goes to work*!

The ZWO Standard Electronic Automatic Focuser (EAF) Pro takes the convenienceand utility of a standard electronic focuser even further with its streamlineddesign. With Bluetooth connectivity and a built-in 2500 mAh battery, the EAFPro can be controlledeither with a conventional USB connection or completely wirelessly! When paired with a compatible device and program, this electronic focusercan drive your focus routines in a completely self-contained hardware formfactor—reducing one more cable from your system for a clearer, cablesnag free, look. This design also provides focus adjustment buttons, allowingyou to rack focus when some other electronic focuser may leave youstuck—as long the EAF Pro has battery power, no software or separatedevice required! Thanks to the growing ubiquity of bracket-styleelectronically assisted focusers, integrating this excellent accessory withmany rack and pinion, linear bearing, and Crayford style focusers in use todayis simple with the included bracket and couplers. With 11 lb. of payloadcapacity, this streamlined focus assistant will give you precision focusingpower over even some seriously stout imaging trains!

*Please Note: Available autofocus algorithms and refocus automation settings vary by software suite and control device. While the ZWO ASIAir and Air camera lines support these features, some imaging suites and WiFi camera control devices may not. Some autofocus algorithms require you are at least rough focused to work properly. Refocusing based on change in temperature requires the ZWO Temperature Sensor (sold separately) or other source of local temperature feedback (for third party software).

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Easy Installation and Extensive Compatibility

Attaching the EAF Pro to your telescope may seem daunting at first, but noneed to fret! The process is simple and straightforward. The EAF Pro replacesthe focusing knob that rests around the focusing shaft and controls focusthrough this connection. Simply remove this focusing knob and attach the EAFPro in its stead with the appropriate included coupler. A mounting bracketalso comes with this package to provide support and secures the EAF Pro in itsplace. There are multiple couplers provided with this EAF Pro, allowing usewith a wide range of telescopes. One side of the coupler attaches to the EAFPro itself, while the other side fits around the focusing shaft of yourtelescope. Four different sizes are provided with this electronic focuser:4-4mm, 4-5mm, 4-6mm, 4-7mm. Unsure if these couplers will fit your telescope?You can easily measure the diameter of your focusing shaft by removing theappropriate focusing knob. Next, take the diameter of the focusing shaft andcompare it to the sizes of the couplers provided to determine compatibilitywith your telescope. This ZWO EAF Pro is known to work with popular telescopefrom Sky-Watcher, SharpStar, Apertura, William Optics, and many more! Pleaserefer to the manual for more information on compatible telescopes.

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A Simple Self-Contained Focus Assistant for Your System!

Upgrade your focusing experience for more precise focusing both local andremote settings, with the ZWO Standard Electronic Automatic Focuser (EAF) Pro!

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Multiple Control Options
The ZWO Standard Electronic Automatic Focuser (EAF) Pro offers four different ways to precisely focus your scope! For the sleekest setup, connect to the EAF Pro via Bluetooth for communication with the ZWO ASIAir Plus*, Air cameras, or Bluetooth-equipped, ASCOM compatible, PCs without a cord. This can either completely eliminate or simplify cable management, depending on whether you intend to add an external power source, helping you avoid snags and giving you more flexibility with your system build. If you’re looking to control your focus from another device or just prefer a hardwired connection, you can connect to the EAF Pro from your ASCOM/INDI compatible computer or a ZWO Air device via the USB-C port. Finally, for users looking for a more manual, software-free, experience the EAF Pro features focus In/Out buttons on the device itself in addition to a 3.5 mm jack to allow the ZWO Hand Controller for Electronic Automatic Focuser (EAF)(sold separately) to control focus when on battery power or with an external source of power connected.

*Please Note: All ASIAIR Plus (2024) models supported. Most prior generation 256GB models will be compatible, and some late production 32GB AISIAIR Plus models. To confirm your non-2024 model ASIAIR Plus will support Bluetooth, check the marking on your device for an IC marking including ‘ASIAIRPLUS’. ‘RPICM4’ models are compatible with a wired only connection.

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Self-Contained Design
With wireless capability and a built-in power source, the EAF Pro can control your systems’ focus completely wire-free! Charge up the internal 2500 mAh battery for a week of standard refocusing routines without a DC or USB cable connected*. Paired with ZWO’s incredible ASIAir Plus (256GB version) or Air cameras via Bluetooth,this gives you a completely self-contained electronic focusing solution forsimpler setup, cable management, and a streamlined look!

* Based on ZWO Lab testing, with 2 refocusing per hour and 8 hourimagings sessions per night.

Astronomy Hub: Your one-stop-shop for Astrophotography Knowledge!

Our Gear Experts have compiled a wealth of information to help expand your astrophotography knowledge! Below you’ll find links to articles, videos and “how-to” guides. Just one more reason that our Astronomy Hub is a one-stop-shop for all your astronomy and astrophotography needs!