This 24-inch Aero Tessar lens, manufactured by Bausch & Lomb of Rochester, New York, was the type of precision optic used in U.S. military aerial reconnaissance and mapping cameras during World War II. Mounted in aircraft flying over the China-Burma-India Theater, lenses like this one captured critical photographic intelligence of enemy positions, supply routes, and terrain, supporting Allied operations across the rugged and remote CBI region. Project: 218479