Optical apparatus and instruments; video recording apparatus; devices for recording and/or for reproducing three-dimensional scenes and/or objects in such a way that they are perceivable by an observer in a three-dimensional manner; devices for displaying on the basis of a plurality of sectional images so as to be perceivable in a three-dimensional manner; displays and monitors for showing moving and still scenes and/or objects in such a way that they are perceivable in a three-dimensional manner; lens arrays for generating depictions that are perceivable in a three-dimensional manner; printed products with depictions which are perceivable in a three-dimensional manner; advertising articles with depictions which are perceivable in a three-dimensional manner