SPEKTRUM* (2010 – ) is an ongoing visual research dealing with the reading processes of lens based images by examining traces, forms and inscriptions that the photographic process leaves in the mind, in both virtual and concrete spaces. The publication SPEKTRUM* contains works realized between 2010 and 2015 in the form of reproductions and installation views made by Katrin Kamrau. This loose-leaf-collection in a box is a living entity that permits interaction, variation and expansion.