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ZWO Standard Electronic Automatic Focuser (EAF) - EAF-S - Used - SOLD

$199.00 $130.00
Price match Guarantee

  • This ZWO Standard Electronic Automatic Focuser (EAF) is Used and in Excellent Condition. Upon inspection, we found that the EAF is fully functional. The Automatic Focuser has been refurbished by ZWO. Otherwise, everything looks excellent.
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  • Comes with High Point 90-Day Warranty

ZWO Standard Electronic Automatic Focuser (EAF)

This ZWO Astronomy Cameras product is changing the game when it comes to achieving that perfect focusing for astrophotography. This tool is an electronic focuser that enables precise and dynamic focus control during sessions of planetary and deep-sky imaging.

The Standard EAF works with all capture software that is supported by the ASCOM platform. This can be added to the ASIAIR WiFi imaging and control system (sold separately) to complete the system and allow users to run their entire imaging sessions with a smartphone or tablet and can do so indoors, if they choose.

Body Design

The body of the EAF was designed in the image of the changing Airy diffraction pattern through a range of focus. It is made with an all-metal, red housing unit. This means it matches the ZWO astronomy cameras. The body includes a 12V DC 5.5mm x 2.1mm, center positive power port and a USB2.0 data port.

Standard Version

The standard version of the EAF has the EAF body, flexible coupling, a motor bracket, and a USB2.0 cable.


The EAF is compatible with the following focusers:

  • Sky-Watcher Astrophotography Reflectors
  • Sky-Watcher Black Diamond
  • Sky-Watcher Dobsonians
  • Sky-Watcher Maksutov-Newtonians
  • SharpStar telescopes
  • SkyRover telescopes
  • TS Optics
  • Astro Tech
  • FeatherTouch Focusers
  • More will be compatible with the EAF in the future, such as Takahashi telescopes and GSO telescopes.


  • Size: 60mm x 50mm x 40mm
  • Motor: Step Motor: 5,760 steps to rotate the circle
  • Power Port: 12V DC 5.5mm x 2.1mm, center positive
  • Data Port: USB2.0 port
  • Weight: 277g.
  • Capacity: 5kg
  • Material: All-metal
  • Color: Red