Rephotography

Crocker Art Museum, Sacramento, California
Fox Tucson Theatre, then and 2008

Rephotography or repeat photography is the act of photographing the same site twice, with a time lag between the two images; a diachronic, "then and now" view of a particular area. Some are casual, usually taken from the same view point but without regard to season, lens coverage, or framing. Some are very precise and involve a careful study of the original image.