Very often people looking at my pictures say, 'You must have had to wait a long time to get that cloud just right (or that shadow, or the light).' As a matter of fact, I almost never wait, that is, unless I can see that the thing will be right in a few minutes. But if I must wait an hour for the shadow to move, or the light to change, or the cow to graze in the other direction, then I put up my camera and go on, knowing that I am likely to find three subjects just as good in the same hour.