PrimaLuceLab ESATTO 4'' Robotic Focuser

Article number:	PLLEST4
Availability:	Out of stock
Delivery time:	More on the Way to Us

PrimaLuceLab ESATTO 4″ Robotic Focuser
Target Use: Observatory-class telescopes or astrographs with large imaging trains needing a high-capacity, high-precision motorised focuser.
Why it stands out: Designed for demanding astrophotography setups with large sensors, heavy filter wheels, OAGs, etc., where free aperture, travel, stability and precision all matter.

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Key Features & Benefits

• Large free aperture: 102.2 mm (≈4″) — supports wide fields / large imaging trains without vignetting. 

• Substantial draw-tube travel: 35 mm of travel. 

• High payload capacity: up to 10 kg (≈22 lb) of imaging train mass, meaning heavy cameras + accessories are supported without sag or flexure. 

• Exceptional resolution: ≈0.04 microns per motor step, enabling extremely fine focusing adjustment necessary for high magnification / long-exposure astrophotography. 

• Crayford‐style mechanism with 40 ball bearings, engineered for very high load capacity with minimal flex. 

• Modern connectivity: USB-C port for direct connection to control computer (or control system like an all-in-one device such as the PrimaLuceLab EAGLE), WiFi capability for smartphone/tablet remote control via the “Virtual HandPad” app. 

• Integrated port for the optional camera rotator/field de-rotator unit (e.g., the ARCO series) allowing seamless combination of focuser and rotator with simplified cabling. 

• Designed for large telescopes/astrographs — for example the manufacturer cites the popular large-aperture astrograph Takahashi FSQ-106 as a target application.