I am still trying to get sharp water drop photos but I think I am getting closer. I set up a decorative gift bag (which is now soaked) behind the facet and let the water drip in a clear glass dish over the sink. This was the best out of the 100 or so shots taken. I also used my new SB900 as a master and had my SB600 off to the side at a right angle. I used manual focus on a spoon laid across the dish where I thought the drops would hit.