Dr. Fritz Gustav Wentzel, 1877-1963, was an amateur photographer, photo historian, and photo chemist who developed the silver bromide photographic paper marketed by Agfa as Brovira. The Wentzel family, including sons Volkmar Kurt Wentzel, Wilfred Wentzel, and Friedrich Wolfgang Wentzel, moved from Dresden to the United States in 1926 when Dr. Wentzel became the director at the Agfa-Ansco photographic paper manufacturing plant in Binghamton, New York.