In a sequence and in an ordering, photographers combine their photographs so closely that one can't separate them without changing the sense of the photographer's work. The present research is consecrated to the following specific forms: disconnecting sequences, evocation sequences and constellation orderings. The disconnecting sequence is an association of heterogeneous elements. With the evocation sequence, the artist generates atmospheres, states of thought and of emotion. The constellation ordering is a dispersed disposal of photographs with a fragmentary character, in propensity. Working from a corpus fo contemporary works (Raymonde April, Christophe Bourguedieu, Stephane Duroy, Christian Milovanoff, Suzanne Lafont, Michael Schmidt, Wolfgang Tillmans) conceived either for the exhibition space, or for the space of a book, we shall question the stakes of these forms in the relationship they create with reality and with a certain form of narration.