Much of the work of Susan Derges (born 1955, London) revolves around the creation of visual metaphors exploring the relationship between the observer and the observed; the self and nature or the imagined and the 'real'. She endeavours to manifest or capture invisible scientific and natural processes - the physical appearance of sound vibration, the evolution of frogspawn or the cycles of the moon. She is best known for her pioneering technique of capturing the continuous movement of water by immersing photographic paper directly into rivers or shorelines. She often creates her work at night, working with the light of the moon and a hand-held torch to expose images directly onto light sensitive paper. Her practice reflects the work of the earliest pioneers of photography but is also very contemporary in its awareness of environmental issues and the complexity of its conceptual meanings.