1. A device comprising: an image sensor, wherein the device is configured to capture images; a processor configured to process an output of the image sensor in order to detect a presence of one or more faces in a field of view of the device; and a feedback mechanism configured to provide feedback responsive to detecting a face in the field of view, wherein the feedback mechanism only provides feedback during a self-portrait mode of the device and in response to a distance between the device and the detected face being within a specified range of distances that is provided by a calibration process for the self-portrait mode, wherein the self-portrait mode is activated when the detected face comprises a face that was previously registered by the calibration process, and wherein the specified range of distances comprises a stored range of distances at which a photographer can hold the device at arm's length.