“Diagonal is a film for three projectors, though the diagonally arranged projector beams need not be contained within a single flat screen area. This film works well in a conventional film theatre when the top left screen spills over the ceiling and the bottom right projects down over the audience. It is the same image on all three projectors, a double-exposed flickering rectangle of the projector gate sliding diagonally into and out of frame. Focus is on the projector shutter, hence the flicker. This film is ‘about’ the projector gate, the plane where the film frame is caught by the projected light beam.”(William Raban, Perspectives on British Avant-Garde Film catalogue, 1977)
