The ESATTO 3" → Takahashi Adapter (M72 × 1 Thread) (PrimaLuceLab, SKU: PL3600245 ) allows the installation of a precise, remote-controlled ESATTO 3" focuser on Takahashi telescopes equipped with an M72 × 1 rear thread (e.g. TSA-120, TOA-130 NS, FS-102, FSQ-85*). The collar screws directly into the tube thread, creating a rigid, on-axis connection with minimal back-focus gain.

The most important features of the adapter

• Thread conversion: M72 × 1 input (Takahashi telescope) → M81 × 1 output (ESATTO 3" front)
• optical thickness < 5 mm – practically no impact on the back-focus budget
• full internal diameter 76 mm – no vignetting for full frame matrices
• CNC milled body made of 6061-T6 aluminum, hard anodized - lightweight, high stiffness and corrosion resistance
• blackened and grooved interior – effective reduction of reflections, improvement of contrast

Set components

• ESATTO 3" flange adapter ↔ M72 × 1 thread
• M4 locking screw (stainless steel)

Technical parameters

• telescopic thread (input): M72 × 1 (female)
• extraction thread (output): M81 × 1 (male)
• optical length: < 5 mm
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773359
• compatible extractor: ESATTO 3"
• manufacturer: PrimaLuceLab – Italy

The PL3600245 adapter enables the integration of the ESATTO 3" focuser with many Takahashi refractors, offering remote, precise focusing and the rigid optical path essential for modern astrophotography.
*Depending on the tube version – check if your telescope has an M72 thread.