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ZWO EAF Electronic Automatic Focuser - ZWO-EAF

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Introducing the new EAF (Electronic Automatic Focuser), the latest innovation from the engineers at ZWO. This electronic focuser enables precise, dynamic focus control for planetary and deep-sky imaging.

Standard Version: EAF body, flexible coupling, motor bracket, USB 2.0 cable.

Advanced Version: EAF body, flexible coupling, motor bracket, USB 2.0 cable, plus hand controller and temperature sensor.

EAF: The Features and Why Will You Need It for Astrophotography


  • Highly integrated design
  • Supports ASCOM platform and various ASCOM-compatible third-party software
  • Supports INDI
  • Supports original software such as ASIAIR and ASICAP
  • Supports automatic focusing
  • Supports hand controller and manual focusing
  • Supports temperature sensor
  • USB HID device, no driver required
  • Stable and durable






    You can opt to purchase the standard version first and add the hand controller and temperature sensor separately.

    The hand controller links to the ZWO EAF to allow easier manual focusing with a comfortable grip. The hand controller attaches with a 3.5 mm female socket, with In Out buttons along with a Slow/Fast setting.






    Support List

    SkyWatcher Astrophotography Reflectors

    SkyWatcher Black Diamond

    SkyWatcher Dobsonians

    SkyWatcher Maksutov-Newtonians

    SharpStar telescopes

    SkyRover telescopes

    TS Optics

    Astro Tech

    Feather Touch

    More focuser will be supported in the future. such as Takahashi and GSO telescopes.  ZWO recommend using an additional focuser or built-in focuser along with the EAF on SCTs and MCTs due to the longer back-focus.








    Size: 59 mm x 52 mm x 41 mm

    Motor: Stepper motor, 35 mm diameter, 5760 steps to rotate 360 degrees

    Power port: 12V DC 5.5 mm x 2.1 mm, center positive

    Data port: USB 2.0 port

    Weight: 277 g

    Capacity: 5 kg

    Connection Diagram

    EAF connection

    Mechanical diagram


    What’s in the Box?


    User manual:

    Read Online - Download

    ZWO are working on more bracket for focusers on market.

    Now, ZWO EAF bracket for Takahashi Scope is available (this part is defined as optional accessories  for ZWO EAF).  Please send us a message at Telescopes Canada if you require additional hardware.

    Support List:

    Takahashi FSQ85
    Takahashi FSQ106
    Takahashi TOA-130NFB
    Takahashi TOA-150B
    Skywatcher Esprit 100
    Skywatcher Esprit 120
    Skywatcher Esprit 150
    Vixen VC200L
    Orion ED80T

    Connecting-bracket for Takahashi Scopepacking information

    Returns Policy

    You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

    Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

    You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

    If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


    We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

    When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

    Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

    Typographical Errors and Order Cancellations

    Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

    Client-Initiated Cancellations

    Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.

    Questions & Answers

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