The ESATTO 3" → GSO / Orion / TPO Ritchey-Chrétien 10", 12", 14" and 16" (M117 × 1 thread) adapter (PrimaLuceLab, SKU: PL3600236 ) allows you to mount the ESATTO 3" remote-controlled focuser to larger RC telescopes. The 43mm optical thickness allows you to maintain the full back-focus budget, and the aluminum collar screws directly into the M117 × 1 rear thread, creating a rigid, axial connection.

The most important features of the adapter

• thread conversion: M117 × 1 input (RC telescope) → M81 × 1 output (ESATTO 3" front)
• optical thickness 43 mm – adapter + ESATTO 3" total 101 mm
• full internal diameter 76 mm – no vignetting on full-frame matrices
• CNC milled body made of 6061-T6 aluminum, hard anodized - lightweight and corrosion resistant
• compatible with aluminum and carbon RC tubes 10", 12", 14", 16"

Set components

• ESATTO 3" flange adapter ↔ M117 × 1 thread

Technical parameters

• telescopic thread (input): M117 × 1 (female)
• extraction thread (output): M81 × 1 (male)
• optical length: 43 mm
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773304
• compatible extractor: ESATTO 3"

The PL3600236 adapter provides a stable mount for the ESATTO 3" focuser on large RC telescopes, maintaining the required back-focus and guaranteeing the optical path alignment necessary for advanced astrophotography.