Preston Holder (September 10, 1907, Wabash, Indiana – June 3, 1980, Lincoln, Nebraska) was an American archaeologist and photographer.
In 1932 Holder was present at a gathering at Van Dyke's house in Berkeley in which this group discussed their intention to unite in promotion of their artistic vision, They were searching for a name for their small group, and Holder suggested "US 256", which was then the commonly used Uniform System designation for a very small aperture stop on a camera lens.
Adams thought the name would be confusing to the public, and he suggested "f/64", which was a corresponding aperture setting for the focal system that was gaining popularity.
With the help of fellow archaeologist Antonio J. Waring, Jr., Preston Holder began excavations at the Irene Mound site in September 1937.
His work in this area was additionally published as a journal article,[9] and discussed in later publications,[4][10] In 1951, he earned his Ph.D. from Columbia University.