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. This will enable you to restrict the light into the camera while going with a much longer exposure time.