Guide Price $75
Electronic Auto Focuser
Sub-micron precision for razor-sharp stars
This high-precision electronic auto focuser delivers stable, quiet and low-backlash autofocus performance for astronomical imaging. Featuring wide compatibility, extreme low-temperature resistance and power-off memory function, it fits portable shooting and remote observatory use perfectly.
Key Features
Simplified Power & Communication
Supports 5V USB power supply. A single Type-A data cable realizes both power supply and communication for simple and neat wiring.
Rich Expansion Interfaces
Comes with dedicated interfaces for temperature probes and infrared remote control, supporting various accessory upgrades with strong expandability.
Multi-Protocol Compatibility
Compatible with ASCOM and INDI protocols, as well as independent Windows APP control, suitable for all kinds of astronomical automatic equipment.
Excellent Low-Temperature Resistance
Verified stable at remote observatories, it works normally at -30°C, suitable for observation in high-latitude and high-altitude areas in winter.
Low Backlash & High Precision
Extremely low mechanical backlash and simple setup. It generates accurate and smooth autofocus curves with high focusing precision.
Ultra-Quiet & Low Vibration
The motor runs silently with extremely weak vibration.
Durable Metal Body
Adopts 6061 aluminum alloy body with anodized surface treatment, featuring high hardness, wear resistance and exquisite appearance.
Power-Off Memory Function
Automatically saves all parameters before power failure. No repeated settings are required after reboot for instant use.
Wide Compatibility
Comes with three aluminum alloy flexible couplings (4-5, 5-5, 6-5) and a standard mounting bracket, compatible with most telescopes on the market.
Long-Term Warranty Service
Comes with a 3-year official warranty for reliable quality and worry-free after-sales support.
Expansion Interfaces
Comes with dedicated interfaces for temperature probes and infrared remote control, supporting various accessory upgrades with strong expandability.
2.5mm Temperature Probe Port(TEMP)
Dedicated 2.5mm jack for the DS18B20 temperature probe. Real-time ambient temperature monitoring enables automatic focus compensation as conditions change throughout the night.
3.5mm IR Receiver Port(HBX)
Standard 3.5mm jack for the infrared remote control receiver. Convenient hands-free focus adjustment without opening software — perfect for quick visual checks and setup.
ASCOM \ INDI \ Windows APP
The EAF works seamlessly with every major astrophotography capture suite and automation platform.
ASCOM Platform Support
Native ASCOM driver with full Focuser interface. Works with N.I.N.A., SGP, APT, SharpCap, and every ASCOM-compatible application.
INDI for Linux and macOS
Open-source INDI driver for KStars, Ekos, and StellarMate. Cross-platform support out of the box.
Windows APP
A full-featured Windows app that enables direct focuser control and initial configuration.
V-Curve Autofocus
Software measures HFR at multiple focus positions and fits the optimal focus point with sub-micron accuracy.
What is in the Box
The focuser comes in two variants: STD and FE. The FE version additionally includes a temperature probe and an infrared remote control.
EAF Motor Unit
Universal Bracket
USB-A Cable
Three aluminum alloy flexible couplings (4-5, 5-5, 6-5)
Temperature probe
Infrared remote
Assorted screws
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