PrimaLuceLab ESATTO 2'' Focuser with ARCO 2'' Rotator

The PrimaLuceLab ESATTO 2″ Focuser with ARCO 2″ Rotator is a powerful, integrated solution for astrophotographers who demand precision control of both focus and camera rotation in a compact form. Engineered for imaging systems where mechanical stability and remote operation are critical, this combo delivers exceptional performance with streamlined connectivity.

Key Features

1. High-Precision Robotic Focuser (ESATTO 2″)

• Uses a Crayford-style mechanism with 18 ball bearings, enabling exceptionally smooth motion and a high payload capacity (up to 5 kg) with virtually no flexure. 

• 15 mm of travel with an ultra-fine 0.04 micron per step resolution, making it ideal for autofocus routines, V-curve focusing, and fine adjustments. 

• Low-profile chassis (only 67 mm thick) reduces space and back-focus requirements. 

• Drawtube uses an M56 × 1 thread and supports stop-ring adapters, allowing secure attachment of DSLR, mirrorless, CCD/CMOS cameras, or visual back. 

• Control via USB-C for reliable wired connection, or Wi-Fi using PrimaLuceLab’s Virtual HandPad app for remote operation from a smartphone/tablet. 

• Compatible with ASCOM drivers, so you can integrate it into most astrophotography/control software. 

2. Integrated Camera Rotator / Field De-Rotator (ARCO 2″)

• Ultra-thin profile rotator, only 20 mm thick — keeps the imaging train compact. 

• Extremely precise control with 1 arcsecond per step resolution. 

• 50.9 mm clear aperture, matching the ESATTO’s drawtube so it does not vignette common sensor sizes.

• Designed to connect directly to the ESATTO via a short interconnect cable — no separate USB or 12 V power cables required. 

• Comes with ASCOM support and is compatible with PLAY, PrimaLuceLab’s astrophotography software, allowing synchronized control of focus and rotator. 

3. Unified Software & Control

• Use PLAY (Prima Luce AstrophotographY) to control both focusing and rotation from one interface — makes setup and automation much simpler. 

• Highly compatible with Windows-based astro software through ASCOM drivers for both focuser and rotator.

4. Mechanical & Operational Advantages

• By combining the focuser and rotator in a designed-together package, you minimize cabling complexity and reduce mechanical flex / misalignment. 

• The ESATTO’s stop-ring system allows locking the camera at a precise rotation angle; using ARCO, you can dynamically rotate the camera or de-rotate the field depending on your mount type. 

• Built with robust materials and serious load capacity, making it ideal for heavy imaging setups (e.g., cooled cameras + filter wheels).

5. Power & Connectivity

• Supplies power / data via a single USB-C cable (from ESATTO to control system). 

• The rotator draws its power/data through ESATTO via the dedicated interconnect — meaning no separate power bricks or long cables to manage.