The ESATTO 3" → ARCO 3" adapter (PrimaLuceLab, SKU: PL3600458 ) connects the ESATTO 3" precision focuser with the ARCO 3" rotator, creating an integrated focusing and framing unit with a full 76mm aperture without noticeable back-focus gain.
• dedicated flanges on both sides – quick installation, no additional adapters
• optical thickness ≃ 0 mm – practically does not change the back-focus budget
• full internal diameter 76 mm – no vignetting on full-frame matrices
• CNC milled 6061-T6 aluminum, hard black anodized – lightweight, stiff, corrosion resistant
• blackened, grooved internal channel – effective reflection reduction
• flange-adapter ESATTO 3" ↔ ARCO 3"
• four M4 mounting screws (stainless steel)
• extractor side: collar adapted to the ESATTO 3" front
• rotator side: flange adapted to ARCO 3"
• optical thickness: ≃ 0 mm
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773960
• manufacturer: PrimaLuceLab – Italy
The PL3600458 adapter allows you to build a compact, fully automated optical path, combining the precise focusing of the ESATTO 3" with the high-resolution framing of the ARCO 3" without compromising on aperture and back-focus.
