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Quick Specs

  • Size： 45mm×60mm×47mm
  • Housing Material： Aluminum Alloy
  • Data Interface： Type-C (5V USB)
  • Motor Specifications： 35mm Stepper Motor
  • Effective Load Capacity： 5KG

AAF

Automatic Electronic Focuser for Effortless Razor Sharp Stars

(16)
$179.00
Taxes incluses Frais de livraison calculés lors du paiement.

Elevate your astrophotography with AAF Automatic Electronic Focuser. Engineered for precise, automated focus control, AAF allows you to maintain razor-sharp star profiles throughout your imaging sequences completely hands-free. Featuring real-time temperature compensation, a high-torque 5KG payload capacity, and a single 5V USB-C cable setup, it delivers uncompromised optical stability for effortless overnight capturing.

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Warranty and Support

For setup support, software downloads and warranty service, contact ToupTek Astro support with your order information.

Reviews (16)

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Full Specifications
  • Size： 45mm×60mm×47mm
  • Housing Material： Aluminum Alloy
  • Data Interface： Type-C (5V USB)
  • Motor Specifications： 35mm Stepper Motor
  • Effective Load Capacity： 5KG

Why Is an Electronic Focuser Essential for Astrophotography?

Auriga star clusters and nebulae photographed by Arndt Wolkenhauer

Auriga - Clusters & Nebulae by ©Arndt Wolkenhauer
27 Hours with ToupTek AAF Auto-Focusing

Manual focusing is the single biggest bottleneck in modern astrophotography. A pin-point star profile at dusk will naturally drift out of focus by midnight due to subtle temperature drops and thermal contraction. An electronic focuser converts a tedious, error-prone manual chore into a seamless, automated workflow.

Zero Touch, Zero Shake

Eliminate hand-induced micro-vibrations that disrupt your framing and waste precious dark-sky exposure time.

Beat Overnight Temperature Drift

Automatically compensate for ambient temperature changes throughout the night, locking in razor-sharp star profiles from your first frame to your last.

True Unattended Automation

Enable seamless auto-focusing after filter changes, meridian flips, or routine time intervals—allowing your rig to shoot flawlessly while you sleep.

AAF Automatic Electronic Focuser Key Features

Engineered for precision, thermal stability, and seamless system integration, ToupTek AAF provides reliable automated focus control throughout long-exposure imaging sessions.

USB-C cable connected to a ToupTek AAF electronic focuser
Starry background with Sky-Watcher, Askar, SKY ROVER and TS brand marks

Is AAF Compatible with Your Telescope Brand?

Support List

  • Sky-Watcher Newtonian reflectors, Black Diamond series, DOB series, etc.
  • Sharpstar: All series.
  • SKYROVER: All series.
  • TS refractors and Astro-Tech telescopes.

Quick & Hassle-Free Mechanical Installation Guide

Installation Instructions for Telescope (Illustrated Using the ToupTek HOPE D60)

  1. 1. Check the packing list, and assemble the specially shaped connecting plate (horizontal installation) or the rectangular connecting plate (vertical installation) using M3 screws.

  2. 2. Remove the focusing knob from the telescope.

  3. 3. Select a flexible coupler of the appropriate size and attach it to the telescope's focuser shaft. Insert the AAF motor shaft into the coupler and secure it with the M4 screws.

  4. 4. Attach the specially shaped connecting plate (for horizontal installation) or the rectangular connecting plate (for vertical installation) to the focuser. Secure the plate to the AAF using M4 screws, and check that the assembly is securely mounted.

  5. 5. Connect the USB cable. Connect the temperature probe and hand controller as needed.

Installation Instructions for Guide Scope (Illustrated Using the ToupTek GS-200 AR)

  1. 1. Check the packing list, and assemble the specially shaped connecting plate (horizontal installation) or the rectangular connecting plate (vertical installation) using M3 screws.

  2. 2. Remove the focusing knobs on both sides.

  3. 3. Attach the small flexible coupler to the guide scope's focuser shaft.

  4. 4. Attach the specially shaped connecting plate (for horizontal installation) or the rectangular connecting plate (for vertical installation) to the focuser. Secure the plate to the AAF using M4 screws, and check that the assembly is securely mounted.

  5. 5. Connect the USB cable. Connect the temperature probe and hand controller as needed.

What's in the Box

Frequently Asked Questions

Does the AAF require a 12V power supply?

No. It operates on 5V power via a single USB-C cable, plugging directly into your mount, mini-PC, or USB hub without extra power bricks.

What is the maximum payload capacity?

The high-torque stepper motor supports imaging trains up to 5 kg (11 lbs) without slippage, even when pointing straight up at the zenith.

Is the installation difficult or permanent?

Not at all. It takes just minutes using included screws—simply swap the original coarse knob for the coupler and bracket with zero permanent modifications to your telescope.

Does the AAF save its position after powering off?

Yes. It functions as an absolute focuser and saves its exact step position, so you don't need to recalibrate your starting point every night.

How does temperature compensation work?

An onboard thermal sensor feeds ambient data to your capture software, automatically executing micro-step adjustments as temperatures drop during the night.