thumb|Model "B" U-2 camera on display at the National Air and Space Museum James Baker developed the optics for a large-format camera to be used in the U-2 while working for Perkin-Elmer. The new camera had a resolution of from an altitude of . The aircraft was so crowded that when Baker asked Johnson for of space for a lens with a focal length, Johnson replied "I'd sell my grandmother for six more inches!"; Baker instead used a f/13.85 lens in a format for his final design.
thumb|model "b" u-2 camera on display at the national air and space museum james baker developed the optics for a large-format camera to be used in the u-2 while working for perkin-elmer the new camera had a resolution of from an altitude of  the aircraft was so crowded that when baker asked johnson for of space for a lens with a focal length johnson replied "i'd sell my grandmother for six more inches"; baker instead used a f/1385 lens in a format for his final design