Davis has produced photography in Paris, Italy, Nigeria and in the Caribbean, and has done a significant amount of portraiture. Davis has photographed Saul Bellow, Maxine Kingston, Tillie Olsen, Ursula K. Le Guin, Diane Johnson, and Kay Boyle. In Nigeria, Davis produced a number of photographs of the Fula people.
Davis has spent time lecturing at Stanford on photojournalism with the communications department.
She has also taught photography at University of California, Berkeley, and University of California, Santa Cruz.