For this project you’ll need a flashgun that you can fire remotely, a container with clear sides for your water, a coloured background and a tripod. Set up the container and backdrop, then position the flash over the container. With the camera on a tripod and set to manual focus and exposure – f/8, ISO200 and the fastest shutter speed that will work with your flash – drop the object into the water and fire the shutter as it hits.