3.5″ → 2″ RotoLock Visual Back Adapter

Description

A William Optics visual back adapter that converts a 3.5-inch connection to a 2-inch RotoLock eyepiece holder. The RotoLock mechanism provides secure, tool-free clamping of 2-inch eyepieces and accessories with a simple twist lock, preventing accidental disconnection during observing. Designed for larger William Optics refractors and other telescopes with 3.5-inch focuser draw tubes.