The invention relates to an optical arrangement for the stereoscopic viewing of objects (8). The arrangement is provided with an imaging system and at least one lens group (1) of fixed focal length for altering the image scale, located between the imaging system and an object (8) being viewed. According to the invention, a regulating device is provided for altering the position of the lens group (1) in the direction of the optical axis and hereby altering the distance (c) between the lens group (1) and a reference edge (4) of the imaging system. The actuation of the regulating device or more specifically, the alteration of the distance (c) hereby enables different enlargements beta ' to be set, in turn enabling the production of virtual intermediate images of objects (8) which are located at different distances within a working field; in the image plane of the stationary imaging system. The invention could therefore be applied very advantageously to restoration work in dental technology and other fields in which the service value provided by the invention is desirable.