As you can guess Dukesha Kate and Prince William are always in the spotlight. But they do not always want to be photographed, even trying to fanatically keep their image in public outcry.
According to Vanity Fair, the prince and his wife have both a genius trick to avoid photographers. They are trying to keep a distracted look while being photographed in the public without ever being fixed at a single point.
This makes the job of the paparazzi more and more difficult, that no matter how hard they try, they will never be able to shoot an accurate picture.
Of course, the opposite occurs in specific cases when William and Kate are prepared to be photographed. They put their good grip and smiled at the camera without trembling the eyelid.