http://www.youtube.com/watch?v=M--oHOn4a0U
http://en.wikipedia.org/wiki/Screen_Tests
The films were made between 1964 and 1966 at Warhol's Factory studio in New York City. Subjects were captured in stark relief by a strong key light, and filmed by Warhol with his stationary 16mm Bolex camera on silent, black and white, 100-foot rolls of film at 24 frames per second. The resulting two-and-a-half-minute film reels were then screened in 'slow motion' at 16 frames per second.
Many of the Screen Tests were arranged in different compilations such as 13 Most Beautiful Women, 13 Most Beautiful Boys, and 50 Fantastics and 50 Personalities. This was done with the intention of pleasing certain audiences who Warhol was exhibiting his art to.
Over 500 screen tests were made, but not all kept.