Ever wanted an easy way to find out what aperture to select to get the right depth of field?Depth of Field is a measurement of how blurred the background looks, the shorter DoF the blurrier. You have probably seen a portrait where the eyes of the model are knife sharp and the ears are a bit out of focus, and the background has a very soft blurriness. How big the range is that is in focus is ruled by the focal distance you use, what aperture you have chosen, the distance to the subject and a parameter in your camera called circle of confusion. Then a rather complex calculation needs to be done.Many photographers carry cards with a chart when they are selecting the values to get a certain depth of field. DoF can do that for you. For example if you know how far it is to the subject and what focal length you use, DoF can calculate what aperture you should use. Set that, let the camera select the time and you