Jonathan Crary : Spectres of Negation : vera Lutter. 2004  

Just read this text :In it he talks about how the camera obscura was used to make drawings originally. Vera Lutter uses it to make negative images that are familia but remain sealed. He then suggests that in the case of Vera Lutter that there is a limiting aspect to the negative image, they remain more silent, evoke absence and in turn melancholy – there is no permanence to things in the negative and yet we know what they are – Spectres

( walter benjamin’s thoughts on melancholy were that it is collectively experienced disslocation of modernity)

Photographic over saturation has reduced the uncanny hallucinatory phantasm that photographs once evoked as a response. Its spectural qualities lost he suggests they can be found in the negative.

http://bombsite.com/issues/85/articles/2584