http://andrewpayne.org.uk/films-light-on-water3.htm

The works in this series are single shot, close-up studies of water as it flows over a weir. The shots capture the interaction of the landscape surrounding the weir with the light on the surface of the water.

The appearance of a shot can also be affected by gradual changes in the sky above the weir; as the cloud cover changes, for example. These changes can be very subtle and occur slowly, almost imperceptibly.