Eugene Delacroix / photographier avant la photographie

"(...) In 1850, Delacroix noted in his journal (...) Since the light of the star which was daguerreotyped took twenty years to traverse the space separating it from the earth, the ray which was fixed on the plate had consequently left the celestial sphere a long time before Daguerre had discovered the process by means of which we have just gained control of this light (...)"

Eugene Delacroix cité par Susan Sontag / On photography / Penguin Books / 2002 pour l'édition consultée / p157