Lens Tube components provide tremendous versatility in converting a lens design into a complete, functioning assembly. Utilizing the anodized aluminum barrels complete with 1.035” x 40 TPI or 0.535” x 40 TPI, an integrator can create a drop in assembly using 1”/25mm or ½”/12.5mm optics respectively. The spacing of the components is accomplished through tightly toleranced brass spacer rings, featuring a blackened exterior for additional light dampening in the barrel. This system of mounting multiple optical components is applicable to OEM applications, as well as research and development.