The ESATTO 3" → Sky-Watcher ESPRIT 120 ED / 150 ED adapter (PrimaLuceLab, SKU: PL3600253 ) enables the mounting of a precise, remote-controlled ESATTO 3" focuser in place of the factory focuser of ESPRIT 120 ED and ESPRIT 150 ED apochromats. The collar uses the stock rear cell holes — the installation is fully reversible and the design back-focus of the refractor remains unchanged.

The most important features of the adapter

• dedicated fit for ESPRIT 120/150 ED rear cell – plug-and-play installation without drilling
• maintaining the nominal back-focus of the structure – compatibility with Sky-Watcher flattens and reducers
• full internal diameter 76 mm – no vignetting for full frame matrices
• CNC milled body made of 6061-T6 aluminum, hard anodized - lightweight, stiff and corrosion resistant
• blackened and grooved interior – effective reduction of reflections, better contrast

Set components

• ESATTO 3" ↔ ESPRIT 120/150 ED flange adapter
• set of M5 mounting screws (stainless steel)

Technical parameters

• compatible telescopes: Sky-Watcher ESPRIT 120 ED (f/7), ESPRIT 150 ED (f/7)
• compatible extractor: ESATTO 3"
• extractor thread (ESATTO side): M81 × 1
• optical thickness of the adapter: < 5 mm (does not affect back-focus)
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773403
• manufacturer: PrimaLuceLab – Italy

The PL3600253 adapter allows you to fully utilize the precise, automated focusing capabilities of the ESATTO 3" system in large ESPRIT refractors, providing a rigid, on-axis optical path and the convenience of remote focusing necessary for modern astrophotography.