the persons and the methods they employed for designing kodak camera lenses are recalled , from the earliest , almost symmetrical four-element air spaced lenses , designed by hand , through the large lenses made for aerial cameras during world war ii and the introduction of rare-earth glasses and then plastics , to very high resolution modern lenses for microfilm cameras and high quality zoom lenses for super-8-mm motion picture equipment , designed almost completely automatically by electronic computers .
C0013879
element
C0025556
rare-earth