An often overlooked factor:
Not only do I adjust shutter speed, ISO, or aperture, I also match the speed of my particular motion. For example, it can vary from quick panning to slower, smooth panning until I figure out what fits the scene or subject in front of me best. Once I determined my settings, and whether I need a filter, find an appealing movement speed, and know that I won’t move around much anymore, I will often switch my lens from autofocus to manual focus. I put it back into autofocus after I change my shooting position and to occasionally recheck focus. Depending on the amount of light, I will readjust shutter speed, ISO, and aperture during the course of a shoot.
It is important to use slower shutter speeds in order to obtain blurry images. I shoot ICM in Manual camera mode only, and I pay close attention to shutter speeds. Below the sample images of this blog you will find the exact settings, camera movements respectively, and what lens I used, to help you understand the concept of this method. I love to shoot at the beach, because I find the movement of water powerful and intriguing. My experience with moving and non-moving subject is this: Your shutter speed is determined by the speed at which your subject moves. With this in mind my approach is different every time when I am at the beach. I start every shoot with observing the water and its particular movement. The light, the mood, and especially how fast the water is moving will determine my settings and shooting position.