The ESATTO 3" → ARCO 2" adapter (PrimaLuceLab, SKU: PL3600416 ) combines the ESATTO 3" precision focuser with the ARCO 2" rotator, creating a compact focusing and framing unit without noticeable back-focus gain. The adapter replaces the factory collars on both devices, providing a rigid, axial connection and a full 50.9mm internal diameter – sufficient for APS-C sensors.
• dedicated flange on the side of the ESATTO 3" lift and ARCO 2" rotator
• optical thickness ≃ 0 mm – practically neutral impact on the back-focus budget
• Inner diameter 50.9 mm – no vignetting for APS-C matrices
• CNC milled 6061-T6 aluminum, hard anodized - lightweight, stiff and corrosion resistant
• blackened and grooved interior – effective reduction of reflections
• flange-adapter ESATTO 3" ↔ ARCO 2"
• four M4 mounting screws (stainless steel)
• extractor side: collar adapted to the ESATTO 3" front
• rotator side: flange adapted to ARCO 2"
• optical thickness: ≃ 0 mm
• Inner diameter: 50.9 mm
• material: aluminum 6061-T6, black anodized
• EAN: 8059020773984
• manufacturer: PrimaLuceLab – Italy
The PL3600416 is the perfect solution when you want to combine the computer-controlled ESATTO 3" focuser with the ARCO 2" rotator, obtaining a fully automated optical path with minimum length and maximum stability.
