This week's photographic super power is how to get silky smooth water flowing in your images. The secret is long exposure of 20-30 seconds. It averages out the water and depending on how long you choose the exposure time, you'll get different effects. You'll need to shoot on a tripod to keep it really steady. Shoot late in the evening or early in the morning and you'll have an easier time with long exposures. Also, use a neutral density or ND filter. It's like a pair of sunglasses for your camera and there are different strengths. You can even stack them to make them more powerful.