In 1930 Rosenberg and Stern bought Peterhans´ studio and equipment, and founded their own photography and design studio specialising in advertising, fashion and portrait photography. This was one of the world's first female-run photographic businesses. They named the studio after their childhood names,
ringl+pit (pit for Rosenberg), which also advantageously disguised their genders Unusually, they signed all of their work together. At first they received few commissions. They photographed friends and lovers they met through bohemian circles, including the dancer
Claire Eckstein and the poet
Marieluise Fleisser. In 1931
ringl+pit's work received positive reviews in the magazine
Gebrauchsgraphik and in 1933 they won first prize for one of their posters in
Brussels. In 1936 the
Abyssinian war broke out, and Walter Auerbach and Rosenberg left for London to visit Stern. Stern and Rosenberg collaborated once again in a few commissions, including one for a maternity hospital, their final work together. During her time in London Rosenberg made a short film of Brecht, reciting his poetry; however, the film was silent. where she worked freelance for magazines, including
Time, Life and Photo Technique. She also made record covers for
Columbia Masterworks. The Auerbachs ended their marriage in 1945 although they remained friends. Between 1946 and 1949 Ellen Auerbach worked with Dr. Sybil Escalona, a child psychologist, at the Menninger psychiatric institute in Kansas. There she photographed and made two films on young children's behaviour. In the early 1950s Auerbach taught photography at the Junior College for Arts and Crafts in
Trenton, New Jersey. In 1955 Auerbach joined nature photographer,
Eliot Porter, on a trip to Mexico to photograph churches. Photographs were taken with natural light, which was unusual at this time. This work did not receive recognition at the time, but were published in two books many years later. This trip was her last professional photography project. At the age of sixty Auerbach embarked on a new career, providing educational therapy for children with learning disabilities at the Educational Institute for Learning and Research in New York. == Later life ==