The Leopard 1A3's fire control system and optics were derived from the contemporary Leopard 2 development; in particular the EMES 12 steoroscopic rangefinder, the PERI R12 commander's sight and the FLER-H are based on early Leopard 2 components.   But on the Leopard 2 prototypes the EMES 12 was not just an optical rangefinder. Paul-Werner Krapke in his book essentially calls it an optical rangefinder with integrated laser rangefinder, which leaves tonnes of room for imagination. The Ja