The M56 × 1 → M54 × 0.75 adapter with stop ring (PrimaLuceLab, SKU: PL3600242 ) enables mounting cameras and accessories with M54 × 0.75 thread in the ESATTO 2" focuser or ARCO 2" rotator. The integrated locking ring allows you to precisely set the camera tilt angle with minimal back-focus increment.

The most important features of the adapter

• thread conversion: input M56 × 1 (ESATTO 2") → output M54 × 0.75 (accessory)
• optical thickness 4 mm (1.5 mm adapter + 2.5 mm ring)
• stop ring with lock – convenient and repeatable camera framing
• CNC milled precision ISO 6H threads
• 6061 aluminum, hard anodized – lightweight and corrosion resistant

Set components

• adapter M56 × 1 ↔ M54 × 0.75 with stop ring

Technical parameters

• Extractor thread (input): M56 × 1 (female)
• accessory thread (output): M54 × 0.75 (male)
• optical length: 4 mm (1.5 mm + 2.5 mm)
• material: aluminum 6061, black anodized
• EAN: 8059020773113
• compatible devices: ESATTO 2", ARCO 2"

The PL3600242 adapter guarantees a rigid connection and precise angle lock, which will be appreciated by astrophotographers who require maximum control over framing while maintaining the full back-focus budget.