[1]: 9–13  She opened a studio in Munich in approximately 1918, took portraits of Kurt Eisner and others, and befriended prominent people such as Rainer Maria Rilke, Friedrich Pollock, and Max Horkheimer.

Among other photographs Krull produced in Berlin were a series of nudes included in a 2000 retrospective of her work at the San Francisco Museum of Modern Art.

Although San Francisco Chronicle art critic Kenneth Baker generally praised her work, he considered the nudes to be "almost like satires of lesbian pornography".

"[5] Krull shot the portfolio's 64 black-and-white photographs in Paris, Marseille, and Holland during approximately the same period as Ivens was creating his film De Brug ("The Bridge") in Rotterdam, and the two artists may have influenced each other.

[1]: 70–77  The portfolio's subjects range from bridges, buildings (e.g., the Eiffel Tower), and ships to bicycle wheels; it can be read as either a celebration of machines or a criticism of them.

"[1]: 127 In World War II, she became disenchanted with the Vichy France government, and sought to join the Free French Forces in Africa.

[6] Due to her Dutch passport and her need to obtain proper visas, her journey to Africa included over a year (1941–1942) in Brazil where she photographed the city of Ouro Preto.

[1]: 252–255 After retiring from the hotel business in 1966, she briefly lived near Paris, then moved to Northern India and converted to the Sakya school of Tibetan Buddhism.