The French Museum of Photography displays a rich collection of equipment and photographic images retracing the history of photography and its social purposes. One can find cameras obscuras, velocigraphs, magic lanterns, rare daguerreotypes, a developing tank, miniature cameras used by spies...in brief, a real Ali Baba's cave were one can learn about the invention process, or simply be surprised and admire the beauty of the cameras and old and modern clichés.