It should be evident to anyone dabbling in single-lens reflexes that total automation is just around the corner. We have gone from the hand-held meter to the built-in but not coupled, to the built-in and coupled to the shutter speed only and thence to the almost universally used through-lens metering system coupled to the shutter speed and aperture controls. We simply center the needle and shoot, often much too oblivious to what exposure we use. If the needle's centered and the exposure's right, who cares if it is f/4 or f/5.6, if it's 1/60 or 1/125 sec? We should care but often don't or we're too careless in operating the camera or just too lazy to look. As a result we're ignorant of whether we've stopped all the action or how much depth of field we've really got. We're letting the machine do our thinking, and since it can't think, our thinking is as often as not, not being done at all.