1. A digital camera comprising: a shutter mechanism; a high dynamic range (HDR) mode of operation selection interface operable by a user; and a controller, wherein when an HDR mode of operation is selected by the user using said HDR mode of operation selection interface, said controller computes bracketing of a nominal exposure by one or more under exposures and one or more over exposures of a scene to be photographed based on a constant aperture; and causes said shutter mechanism, upon a single shutter activation, to make in rapid succession the one or more under exposures, the nominal exposure and the one or more over exposures of the scene, whereby the user is able to capture a set of HDR combinable images using only one selection operation by the user followed by actuation of a single shutter activation.