For this waterfall photo, I switched the Rokkor 16mm fisheye (on an MD-MA adapter) to capture the entire fountain. I considered the old trick of shooting at a very slow shutter speed to make the water blur and look like a solid sheet.
Instead, I shot at 1/320sec. I like the water droplets you see falling from the main stream of water. Those would have been lost at a slower shutter speed.
Better photos with the Sony A300 or A350
This guide will show you how!