Gustav E. Eberhard (10 August 1867 – 3 January 1940) German astrophysicist.
Eberhard published numerous investigations on spectroscopy and on photographic photogrametry.The Focal Encyclopedia of Photography, Desk edition 1969, page 491
The photographic Eberhard effect (belonging to the edge effects family) is named after him and was published in 1926.Die Grundlagen der photographischen Prozesse mit Silberhalogeniden, Dr. Rudolf Meyer, Akademischer Verlagsgesellschaft Frankfurt am Main 1968 Band 2, page 972
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