Fiber optic light guides project a large, diffuse beam of light – not a collimated or focused spot. Lens assemblies at the end of the fiber can collect light efficiently and shape the output effectively over smaller areas. The fiber optic focusing lenses are available in two configurations – mounted in our C- and T-Mount components, or in a slim mount for direct integration with many of our light guides. The C- and T-Mount configuration requires a standard Dolan-Jenner adapter, and can be used with any light guide. Additional accessories may be added with our C- and T-Mount components. Stock #58-837 can be used with any of our 1/8" or ¼" light guides with tip diameters of 0.187" or 0.312". #58-836 can be used with our semi-rigid and hybrid light guides with end-tip diameter of 0.500".