Images of a Camera Obscura The link address is: http://www.google.com/search?q=camera+obscura+history&hl=en&client=firefox-a&hs=0BS&sa=X&rls=org.mozilla:en-US:official&biw=1296&bih=565&prmd=ivns&tbm=isch&tbo=u&source=univ&ei=WW1ZTsq4J4PjsQKAu8GHAQ&ved=0CEgQsAQ