A scanner for the detection of one-dimensional and/or two-dimensional codes has a light receiver arranged in a housing and an optical receiving system associated therewith and also accommodated in the housing. At least one light source is additionally provided in the housing to illuminate the region to be scanned arranged in a scanning plane. At least one of the light source and the optical receiving system is movable in order to allow a reading distance between the housing and the object plane to be varied.