As cultural-historical or contemporary documents, photographs are central sources of information for research and mediation. But photography is also a focus of collections and exhibitions. Marjen Schmidt presents the technical development of photography until today. The volume describes the production methods of photographic techniques from the early nineteenth century, outlines conservation-related issues, and proposes measures. The author also dedicates herself to aspects related to archiving digital pictures long term. The volume provides richly illustrated, practical assistance for identification and makes reference to risks connected with handling. In-depth information on archiving, presentation, and conservation measures facilitate dealing with the sensitive materials.