At the end of the 1940s, Keetman was one of the young savages of the fotoform group, who, inspired by the experiments of the pre-war avant-gardes, wanted to develop a new language of photography based on formal reduction, the creative power of light and the subjectivity of individual experience of the world. Together with Otto Steinert and the other members of fotoform, Peter Keetman stands for the awakening of photography.