During this period she began to integrate with, and eventually became part of the stable of photographers that belonged to the Carl Siembab Gallery, with whom she shared a building in Boston.
While studying with Ansel Adams, she worked almost exclusively in the medium of black-and-white photography, making several series of still lifes and architectural photographs.
[6][8] In 1962, recommended by Ansel Adams, Cosindas was one of about a dozen photographers who were invited by Dr. Edwin Land and the Polaroid Corporation to test their new instant-developing color film.
[9] From this time she began to work exclusively in color, manipulating various components of the process to produce the warm tones she preferred.
Using only available light and often having only a few minutes in which to photograph her subjects, Cosindas produced a remarkably distinct portfolio of portraits of well-known figures.
[15] Subjects of her portraits work include Andy Warhol, Truman Capote, Faye Dunaway, Robert Redford, Paul Newman, Ezra Pound and Tom Wolfe, among others.