The M48 × 0.75 female adapter for ARCO 2" (PrimaLuceLab, SKU: PL3600424 ) allows you to attach your ARCO 2" rotator to accessories featuring an M48 × 0.75 male thread – a popular standard in 2" reducers, correctors and filters. The adapter replaces the rotator's telescopic collar, offering an axial, rigid connection with minimal back-focus gain.
• conversion: ARCO 2" flange → internal thread M48 × 0.75 (female)
• optical thickness of only 3.5 mm – almost neutral impact on the back-focus budget
• Inner diameter 48 mm – suitable for APS-C sensors
• Milled 6061-T6 aluminum, hard black anodized – lightweight, durable construction
• blackened, grooved interior - effective reduction of reflections and improvement of contrast
• adapter M48 × 0.75 (female) for ARCO 2"
• four stainless steel M4 mounting screws
• rotator side: flange adapted to ARCO 2"
• telescopic thread (input): M48 × 0.75 (female)
• optical thickness: 3.5 mm
• Inner diameter: 48 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020773939
• manufacturer: PrimaLuceLab – Italy
The PL3600424 adapter is a quick and reliable solution when you need to integrate an ARCO 2" rotator with an M48 × 0.75 threaded accessory while maintaining axiality, stability and minimal increase in optical path length.

