PrimaLuceLab ESATTO 2" LP Low Profile Robotic Focuser
- 32mm low-profile thickness
- 50.9mm clear aperture
- 10mm of precise focuser travel
- 0.03 microns per step resolution
- 5kg payload capacity
The PrimaLuceLab ESATTO 2" LP robotic focuser delivers automated, high-precision focusing in an ultra-slim 32mm body, making it essential for optical systems with limited back-focus. It supports a 5kg imaging payload through a generous 50.9mm clear aperture, all while weighing only 730g. With 10mm of precise travel and a resolution of 0.03 microns per step, you can achieve critical focus remotely for sharp, high-resolution images.
Many modern telescopes, particularly Schmidt-Cassegrains with reducers like the Celestron EdgeHD 8", have very little back-focus to accommodate a full imaging train. The ESATTO 2" LP directly solves this problem with its minimal 32mm optical thickness, allowing you to fit a filter wheel and off-axis guider where a standard focuser would be too long. Despite its slim design, the focuser provides a large 50.9mm clear aperture, ensuring no vignetting even with full-frame sensors.
Achieving perfect focus on a high-resolution sensor requires incredibly fine adjustments. The ESATTO 2" LP's motor provides a repeatable step resolution of just 0.03 microns, eliminating backlash and ensuring you can dial in the sharpest possible stars. You control the focuser remotely via a modern USB-C port or built-in WiFi, connecting directly to PrimaLuceLab's PLAY astrophotography software or standard ASCOM-compliant applications. The short 10mm travel range is a direct trade-off for the compact design, optimized for fine-tuning rather than coarse adjustment.
Engineered to prevent tilt and flexure, the ESATTO 2" LP supports a robust 5kg imaging payload. This is more than enough capacity to handle a cooled astronomy camera, a filter wheel, and an off-axis guider without compromising mechanical stability. For a fully automated imaging rig, the focuser integrates seamlessly with the PrimaLuceLab ARCO robotic rotator, creating a rigid, remotely controlled system for both focusing and field framing.
The Celestron EdgeHD 8", especially with its 0.7x reducer, has a very strict back-focus requirement. The ESATTO 2" LP's ultra-slim 32mm profile is one of the few robotic focusers that can fit within this limited distance while still allowing room for other essential accessories like a filter wheel or off-axis guider.
The 10mm travel distance is designed for fine focusing after coarse focus has been set with the telescope's primary focuser. It's ideal for automatic temperature compensation and achieving critical sharpness with software, but not for large initial focus adjustments. This is a deliberate design trade-off for its low-profile form factor.
Yes. The ESATTO 2" LP has a payload capacity of 5kg (11 lbs), which is sufficient for most modern imaging setups. It can reliably support a cooled CMOS or CCD camera, a 2" filter wheel, and an off-axis guider without introducing flexure or tilt into the optical train.
You can control the ESATTO 2" LP in multiple ways:
The focuser features a large 50.9mm clear aperture, which is designed to fully illuminate sensors up to full-frame (43mm diagonal) without vignetting. This ensures your flat frames can correct for an evenly illuminated field, provided the rest of your optical train is also full-frame compatible.
Yes. The ESATTO 2" LP requires optional adapters for both the telescope and camera sides to ensure a secure, threaded connection. PrimaLuceLab offers a wide range of adapters for different telescope thread types (like SCT thread) and camera connections (like M48 or M54), which must be purchased separately.
| Profile Thickness | 32mm |
| Clear Aperture | 50.9mm |
| Focuser Travel | 10mm |
| Step Resolution | 0.03 microns per step |
| Payload Capacity | 5kg |
| Weight | 730g |