The ESATTO 3" → Sky-Watcher ESPRIT 100 ED adapter (PrimaLuceLab, SKU: PL3600288 ) allows you to replace the factory focuser of the ESPRIT 100 ED apochromat with a precise, remote-controlled ESATTO 3" focuser. The collar uses the original hole pattern of the refractor's rear cell, making the mount fully reversible and the telescope's designed back-focus preserved.

The most important features of the adapter

• dedicated fit for ESPRIT 100 ED rear cell – plug-and-play installation without drilling
• maintaining the nominal back-focus of the structure – compatibility with the manufacturer's flattener 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 100 ED flange adapter
• set of M5 mounting screws (stainless steel)

Technical parameters

• compatible telescope: Sky-Watcher ESPRIT 100 ED (f/5.5, 100 mm)
• compatible extractor: ESATTO 3"
• extractor thread: M81 × 1 (ESATTO side)
• optical thickness of the adapter: < 5 mm (does not affect back-focus)
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773632
• manufacturer: PrimaLuceLab – Italy

The PL3600288 adapter enables full integration of the ESATTO 3" focuser with the ESPRIT 100 astrograph, providing remote, repeatable focusing and the rigid, on-axis optical path required for modern astrophotography.