At the heart of Capturing the Light, there lies a small scrap of purple-tinged paper, over 170 years old and about the size of a postage stamp. On it you can just make out a tiny, ghostly image -- an image so small and perfect that 'it might be supposed...

First Major Exhibition Devoted to History of Manipulated Photography Before Digital Age Opens at Metropolitan Museum October 11 October 11, 2012—January 27, 2013 Exhibition Location: Galleries for Drawings, Prints, and Photographs and The Howard Gilman...