The negative is comparable to the composer's score and the print to its performance. Each performance differs in subtle ways.

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His father bought a three-inch telescope and they enthusiastically shared the hobby of amateur astronomy visiting the Lick Observatory on Mount Hamilton together. C. In March 1963 Ansel Adams and Nancy Newhall accepted a commission from Clark Kerr the President of the University of California to produce a series of photographs of the University's campuses to commemorate its centennial celebration.

Adams's photographs are reproduced on calendars posters and in books making his photographs widely distributed. The resulting clarity and depth characterized his photographs and the work of those to whom he taught the system. With Fred Archer Adams developed the Zone System as a way to determine proper exposure and adjust the contrast of the final print.