The ESATTO 3" Robotic Focuser delivers precise, motorised focusing for demanding astrophotography setups. Its robust design supports heavy imaging equipment and advanced accessories, making it ideal for large refractors, Ritchey-Chretien, or Cassegrain telescopes.

Key Features

• Crayford-style focuser with 28 ball bearings for high load capacity up to 8 kg and minimal flexure
• Low-profile body with only 58 mm thickness (77 mm with internal flange)
• 25 mm travel range with an impressive 0.04 micron step resolution
• Remote control via USB-C connection or WiFi using the Virtual HandPad app
• ASCOM driver support for integration with astrophotography software
• M81x1 male thread and optional adapters for secure camera and telescope connections
• Dedicated ARCO port for seamless integration with camera rotators and field de-rotators

Designed for Heavy Loads and Large Apertures

The ESATTO 3" offers a generous 76 mm free aperture, supporting large sensors and heavy accessories such as filter wheels, off-axis guiders, and adaptive optics. Its advanced bearing system ensures smooth, precise movement even under substantial weight.

Flexible Connectivity

• Control from Windows computers or EAGLE systems via USB-C
• WiFi remote operation from smartphones, tablets, or computers
• Compatible with a wide range of telescopes and cameras using optional adapters

Expandability

The integrated ARCO port allows direct connection to ARCO camera rotators and field de-rotators, enabling advanced framing and field rotation control for both equatorial and alt-azimuth mounts.