Abstract: The invention concerns a device for simultaneously performing alignment and sighting operations relative to an adjusted vanishing line, and includes a light source, a bundle of parallel light, which is split into two partial light beams. Two identically constructured photo-electric transducer units are arranged one in each of the partial light beams. A subsequent electronic evaluation logic is connected to the photocells of said photoelectric transducer unit for evaluation of deviations from a desired aligned and sighting state. To this purpose identically located photocells in the two photoelectric transducer units are electrically connected to first difference amplifiers and diametrally opposed photocells in each photoelectric transducer unit are connected to first difference amplifiers followed by third difference amplifiers and to second difference amplifiers, respectively.