LONDON.- Tate Modern has unveiled the twelfth commission in The Unilever Series by the artist Tacita Dean. Entitled FILM, the work is an eleven-minute silent 35mm looped film projected onto a monolith standing 13 metres tall at the end of a darkened Turbine Hall. It is the first work in The Unilever Series to be devoted to the moving image. FILM is a portrait of the analogue, photochemical, non-digital medium of film. It was made by turning a Cinemascope lens 90º and upending the usual landscape format of the movie screen so it becomes vertical, scaling itself to the proportions of the Turbine Hall. FILM has been constructed using in-camera and studio techniques, such as masking, double-exposure and glass matte painting, to recapture the sense of wonderment generated by these skills during the early days of cinema. The images have been deliberately created during the film shoot rather than in post-production and edited