Lens tubes are an excellent way to mount optical components like lenses and optical filters where the center of the lens tube is coincident with the optical axis. Lens tubes are available in Ø1/2", Ø1", Ø30 mm, Ø1.5", Ø2", Ø3", and C-Mount versions and are supported by an extensive array of lens tube accessories. In addition, the lens tubes are compatible with SM-threaded optical mounts and Thorlabs' cage systems.