TECHSPEC® Multi-Element Tube System Accessories provide increased system integration and control of optical elements in the TECHSPEC Multi-Element Tube System. Joint Rings facilitate the connection of multiple Multi-Element Systems, and can control the aperture between systems. C-Mount Converters and Cage Plates enable the integration of C-Mount systems and Cage Systems. The TECHSPEC® Multi-Element Spanner Wrenches provide precise control over optical spacing, while allowing beams to pass, and the Retainer Ring Set allows for that spacing to be locked in place. TECHSPEC® Multi-Element Accessories provide new functionality to the already highly capable Multi-Element Tube System.