PrimaLuceLab ESATTO 3'' Focuser with ARCO 3'' rotator

Article number:	PLLEST3ARCO3
Availability:	Out of stock
Delivery time:	More on the Way to Us

The PrimaLuceLab ESATTO 3″ robotic microfocuser paired with the ARCO 3″ camera rotator provides astrophotographers with a powerful, integrated system for precision focusing and field rotation in large, demanding telescope setups.

Key Features

1. High‑Precision Robotic Focuser

• The ESATTO 3″ uses a Crayford-style mechanism with 28 ball bearings, enabling very high load capacity (up to about 8 kg) with minimal flexure. 

• Offers 25 mm of draw-tube travel, giving plenty of range to adjust focus for heavy imaging trains. 

• Ultra-fine resolution of 0.04 microns per step, making it well-suited for automated autofocus routines. 

• Low profile body — about 58 mm thick (or ~77 mm including internal flange) — helps preserve back‑focus in tight optical systems. 

• Connectivity includes USB-C for reliable wired control plus Wi‑Fi with PrimaLuceLab’s Virtual HandPad app, enabling remote focus from a smartphone, tablet, or computer. 

• Comes with ASCOM drivers for third-party software integration and support in PLAY (Prima Luce AstrophotographY) for unified device control. 

• The draw-tube has an M81 × 0.75 thread, and optional camera adapters with stop rings allow you to lock the camera orientation precisely. 

2. Integrated High‑Resolution Rotator

• The ARCO 3″ rotator offers 1 arcsecond per step resolution, enabling very fine control over camera rotation and field de‑rotation. 

• Its body is very slim — only 23 mm thick — which helps maintain a compact imaging train. 

• Provides a 76.3 mm free aperture, which matches the large draw-tube of the ESATTO 3″ so as not to vignette larger sensors or heavy accessories. 

• Designed to connect directly to ESATTO via a built-in “rotator port” — no additional USB or 12 V power cables required, simplifying cabling and reducing clutter. 

• Uses a full-aluminum housing, giving it the strength to rotate even heavy cameras and imaging gear without flex. 

• Compatible with ASCOM drivers and fully supported by PLAY software, giving synchronized control of both focus and rotation.