The Nested Rotation Mount provided by LBTEK consists of an outer mount ring (RME-1AS) and an inner mount ring (RME-1A), suitable for Ø25.4 mm optical components. The optical component is secured to the inner ring via an SM1R retaining ring, allowing for quick switching between different optical components by replacing the inner ring. The inner ring can rotate 360° and features a dial with a marking accuracy of 2° per division. The inner ring has SM1 internal threads for mounting optical components with SM1 external threads, or it can use a retaining ring to mount Ø25.4 mm optical components with a maximum thickness of 9 mm. The outer ring includes a hand-tightened locking screw to secure the inner ring, and both the outer ring and inner mount are available for individual purchase.