Hans, I agree with the Niepce photograph but that one was of a rooftop and did not show vanished pedestrians - the one I am thinking of is a photo of a boulevard in which there is a shoeshine event taking place and the parties are more or less visible because during the course of the exposure they did not move much - while the rest of the population scurried about. Andy On Aug 27, 2011, at 8:14 AM, Hans Klemmer wrote: > Kostas, > I think Niepce' famous photograph was an 8 hour exposure onto a plate coated with Bitumen of Judea... >