A mark caused by a hair on the lens or a speck of dust in the camera can be removed from an image. Overexposure, which washes out the subject, or an odd hue can be adjusted. That can sometimes lead to spurious criticism. In 2011 Hir TV, a Hungarian channel, accused The Economist of portraying Viktor Orban, the country’s prime minister, unfavourably after we published a photograph of him cropped to fit the width of our print columns and edited to remove a yellow tint.