How to Photograph Bodies of Water Using Your Digital SLR
Press the shutter button halfway to achieve focus then take the picture.
A tripod may come in handy for a series of ocean waves. Choose the slowest shutter speed possible — 1/15 of a second or slower. Make sure you photograph lakes early in the morning or late in the afternoon, when the sun shines wonderful golden rays and everything in its path casts soft, pleasing shadows.