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Wide-Angle Aerial Lens.--A new wide-angle aerial camera lens that covers a field of more than 90 degrees has been developed for the United States Air Force.
Produced by Bausch & Lomb Optical Co., Rochester, N. Y., after two years of research, the lens is known as the Cartogon. Based on a study of a prototype discovered in Germany after World War I I, construction of the five-element Cartogon improves upon previous aerial camera lenses by the addition of a plane parallel element. The added element provides a better means for controlling image distortion.
Dr. Konstantin Pestrecov, chief photographic lens designer at Bausch & Lomb, says the lens "opens new possibilities in aerial mapping. It is practically distortion-free and is capable of much finer image detail than could be obtained with previous wide-angle lenses." In a special mount and given the name, Planigon, by the Air Force, the lens has been adopted by that branch of the services for "standard use in precision aerial mapping," he added.
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