An improved lens mounting systems for use in lens relay systems in disclosed. The lens mounting system includes at least one lens and a tubular lens mount. The tubular lens mount is portion of a cylinder with a cross section slightly larger than a semicircle. The edges of the tubular lens mount may be beveled. The inner diameter of the tubular lens mount may be equal to, or slightly smaller than, the outer diameter of the lens. In addition, the tubular lens mount may be in three point contact with the mounted lens.