'Mental Picture' by Wolfgang Tillmans is part of 'The Unphotographable' exhibition at the Fraenkel Gallery in San Francisco that explores ‘a parallel history in which photographers and other artists have attempted to describe by photographic means that which is not so readily seen: thought, time, ghosts, god, dreams.’
Check this link for more information about the exhibition

'Mental Picture' by Wolfgang Tillmans is part of 'The Unphotographable' exhibition at the Fraenkel Gallery in San Francisco that explores ‘a parallel history in which photographers and other artists have attempted to describe by photographic means that which is not so readily seen: thought, time, ghosts, god, dreams.’

Check this link for more information about the exhibition