Thorlabs’ Lens Tube System allows easy construction of multi-element optical systems for Ø1/2", Ø1", Ø2", and Ø3" Optics. To further enhance this system, a wide range of accessories are available. Pictured here are adapters for connecting different-diameter elements of the system to one another or quickly connecting and disconnecting similar-diameter elements. Also available are couplers that allow multiple pieces to be connected together to achieve longer lengths. Adapters are available for camera lenses with C-Mount adapters as well as SM1-style microscope objectives. Additionally, adapters that can integrate standard optomechanical components with SM1 threading can be purchased here.