If you are not familiar with neutral density filters, I can promise you that adding one to your arsenal will dramatically impact your photography. It puts you in control of the water, whether that is the waves of an ocean, currents in a creek, or the appearance of a downtown fountain. It also allows you create movement in clouds. As such, it is enormously useful to the outdoor photographer. We’ve already talked about what to buy here and here and also what not to buy. Now here is a video that ties it all together and shows you what you need to buy and use neutral density filters.