"Occasionally (but alas all too rarely) a 'detail' attracts me. I feel that its mere presence changes my reading, that I am looking a new photograph, marked in my eyes with a higher value. This 'detail' is the punctum. [...] Very often the punctum is a 'detail,' i.e., a partial object.[which] is also: sting, speck, cut, little hole-and also a cast of the dice. A photograph's punctum is that accident which pricks me (but also bruises me, is poignant to me). [...] A detail overwhelms the entirety of my reading; it is an intense mutation of my interest, a fulguration. By the mark of something, the photograph is no longer 'anything whatever.' This something has triggered me, has provoked a tiny shock, a satori, the passage of a void (it is of no importance that its referent is insignificant). A strange thing: the virtuous gesture which seizes upon 'docile' photographs (those invested by a simple studium) is an idle gesture (to leaf through, to glance quickly and desultorily, to linger, then to hurry on); on the contrary, the reading of the punctum (of the pricked photograph, so to speak) is at once brief and active [...] The studium is ultimately always coded, the punctum is not ... However lightning-like it may be, the punctum has, more or less potentially, a power of expansion. [...] There is another (less Proustian) expansion of the punctum: when, paradoxically, while remaining a 'detail,' it fills the whole picture. [...] Last thing about the punctum: whether or not it is triggered, it is an addition: it is what I add to the photograph and what is nonetheless already there.
- Roland Barthes (1915 – 1980)
Camera Lucida: Reflections on Photography
