Picked up two original stereoview cards of the 1906 quake from Ebay. One by the H.C. White Co. showing the view up Market Street from the top of the Ferry Bldg. The other one is from the Keystone View Co. showing refugees camping at Fort Mason.These are original photographic prints mounted on cardboard. Stereoview photographs are taken by a camera with two lenses, which takes two separate photos about 2.5" apart, which is approximately the distance between our eyes. The photos appear identical , but in fact are both slightly different. When viewed with a stereoviewer, the two views assimilate into one, and the brain percieves the image in 3D. Stereographs were very popular at the turn of the century. 3 1/2" x 7" sepia silver gelatin.
© Joseph Greco