The ESATTO 2" LP for 3.3" SC thread adapter (PrimaLuceLab, SKU: PL3600539 ) allows direct mounting of the ESATTO 2" LP low-profile focuser on Schmidt-Cassegrain telescopes with a large 3.3" SC rear thread (3 ¼″ × 16 TPI) used in models such as the Celestron EdgeHD 925/1100/1400 and Meade ACF 12″/14″. The adapter screws into the rear SCT cell, providing an on-axis connection with minimal optical length.

Key Features

• thread conversion: 3.3" SC (3 ¼″ × 16 TPI) → internal M60 × 1 (ESATTO 2" LP front)
• full 76mm pass-through diameter – no vignetting for full-frame sensors
• 6061-T6 aluminum milled body, black hard anodized - lightweight and corrosion resistant
• internal blackening and matt grooving – reduction of reflections and glare
• plug-and-play installation – uses the factory telescope thread, no need for additional spacer rings

Set components

• adapter 3.3" SC → M60 for ESATTO 2" LP

Technical parameters

• telescopic thread (input): 3.3" SCT (3 ¼″ × 16 TPI)
• extraction thread (output): M60 × 1
• optical length: 8 mm
• Inner diameter: 76 mm
• material: aluminum 6061-T6, anodized
• EAN: 8059020774707
• manufacturer: PrimaLuceLab – Italy

The PL3600539 adapter allows you to fully utilize the precision of the ESATTO 2" LP focuser in large SCT/EdgeHD telescopes equipped with a 3.3" thread, offering a solid, on-axis connection and a wide aperture without the risk of vignetting.