MIL-DTL-48558C, DETAIL SPECIFICATION: TELESCOPE, ELBOW - M138A1 (14-SEP-2012) [SUPERSEDING MIL-T-48558B]

MIL-DTL-48558C, DETAIL SPECIFICATION: TELESCOPE, ELBOW - M138A1 (14-SEP-2012) [SUPERSEDING MIL-T-48558B]., This specification covers Telescope, Elbow: M138A1, which is one type of elbow telescope that provides an eight power magnification and an eight degree field of view. The telescope has a mil scale reticle for setting elevation. The reticle pattern is illuminated with a battery powered system.