Image 5D Mk II, 16-35 f2.8 L II, 30mm at f 16, 1/4 sec, 3 stop GND soft
Although I don't really try to hard to work with the so called Rule of Thirds it does work. When an image can be divided in to 9 separate portions of equal (or close) size by 2 horizontal and 2 vertical lines and placing points of interest at the intersections it meets a certain balance that is more pleasing the eye, if any one took art in school maybe you will remember this. But it is one more thing to think about when composing an image, I have found composition to be easier for me when I set up my equipment and do a quick composure through the viewfinder and then use live view to make adjustments, that 3 inch screen is a lot easier to see than the peep hole of a viewfinder. Only a few images work where the point of interest is centered in the image, most of the time you want the primary subject off center.
Ross Murphy Images In Light