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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
ZWO EAF Hand Controller

ZWO EAF Hand Controller

by ZWO
SKU ZWO-EAF-HC
$39.90 - $39.90
$39.90
$39.90 - $39.90
$39.90
Price Match Policy!
  • Precise, tactile focus control for ZWO EAF
  • Operate focuser without a computer or ASIAIR
  • Variable speed for coarse and fine adjustments
  • Ideal for visual astronomy and initial setup
  • Includes dedicated connecting cable
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • ZWO Hand Controller for Electronic Automatic Focuser (EAF)

    The ZWO Hand Controller for the Electronic Automatic Focuser (EAF) restores tactile, real-time focus adjustment to your telescope without requiring a connection to a computer or ASIAIR. It provides direct, physical control over the EAF motor, allowing for immediate and intuitive focusing adjustments while you are at the eyepiece. This makes it an essential tool for visual observers or for imagers who need to achieve perfect initial focus before starting an automated session.

    Intuitive At-the-Eyepiece Focusing Control

    This controller eliminates the need to look at a screen to make focus changes. By connecting directly to your ZWO EAF, you can make micro-adjustments with the IN and OUT buttons while looking through the eyepiece, allowing you to react instantly to changes in seeing conditions. The two-stage button design allows for both fine and coarse adjustments, giving you precise control when chasing critical focus on planetary details or splitting tight double stars.

    Streamlined Setup for Visual Astronomy & Outreach

    For visual astronomers using the ZWO EAF, this hand controller is a game-changer. It simplifies your setup by removing the dependency on a computer or smart device for basic operation. This is especially valuable for outreach events or quick observing sessions where you want the precision of an electronic focuser without the complexity of a full software-based imaging rig.

    Hardware Control vs. Software Control

    While software like ASIAIR provides powerful automated focusing routines, the ZWO EAF Hand Controller serves a different, crucial purpose. It is not for running V-curves or temperature compensation; it is for direct, manual control.

    • Software Control (ASIAIR/PC): Best for automated, data-driven focusing routines, filter offset calculations, and remote operation. It is the primary method for unattended astrophotography.
    • ZWO EAF Hand Controller: Superior for establishing initial focus, making quick manual adjustments during visual observation, and for anyone who prefers the tactile feedback of a physical button over a software interface. It complements, rather than replaces, software control.

  • What is the ZWO EAF Hand Controller used for?

    The ZWO EAF Hand Controller allows you to manually operate your ZWO Electronic Automatic Focuser without being connected to a computer, ASIAIR, or other smart device. It's designed for direct, tactile control at the telescope, which is ideal for visual observing or for setting your initial focus before an imaging run.

    Is the ZWO EAF Hand Controller compatible with all versions of the EAF?

    Yes, this hand controller is designed to work with both the standard (5V) and advanced (12V) versions of the ZWO EAF. It connects via the included cable to the dedicated port on the EAF body.

    How does the ZWO EAF Hand Controller help when focusing on a faint object like the Horsehead Nebula (Barnard 33)?

    When focusing on faint deep-sky objects, the ability to make tiny, controlled adjustments without introducing vibrations is critical. The ZWO EAF Hand Controller allows you to make these fine adjustments while looking through the eyepiece (or at short test exposures), ensuring you can achieve the sharpest possible stars without the distraction of a computer screen or the vibration from touching the telescope's focuser knob.

    Can I use the hand controller and ASIAIR at the same time?

    The hand controller is intended for manual operation when the EAF is not under active software control. While physically connected, using the hand controller while an automated focusing routine is running in ASIAIR would interfere with the routine. It is best used for initial setup before handing control over to your automation software.

    Is the ZWO EAF Hand Controller useful for setting up an 8" SCT for planetary imaging?

    Absolutely. An 8" f/10 SCT has a very narrow critical focus zone, especially when using a Barlow lens for planetary work. The hand controller lets you precisely dial in the focus on Jupiter's cloud bands or Saturn's rings while viewing a live feed on your laptop, without having to switch between windows or touch the telescope itself.

    Does the ZWO EAF Hand Controller have variable speed control?

    Yes, the controller offers two-speed control. A light press on the IN or OUT buttons moves the focuser slowly for fine adjustments. A firm, full press moves the focuser more quickly for coarse adjustments, allowing you to move through the focus range efficiently.

  • SKU Number ZWO-EAF-HC
    Warranty ZWO - 2 Years

    • ZWO Hand Controller for Electronic Automatic Focuser (EAF)

      × 1

    • Connecting Cable

      × 1

  • ZWO 2-Year Limited Warranty