1. A camera, comprising: a user interface for the input of information indicative of the activity of a user wherein said user interface comprises a user selection unit for the manual selection of at least one activity from a predetermined group of manually selectable activities; a control unit arranged to control at least one function of the camera in dependence upon said information; and a user activity determination unit arranged to estimate the activity of a user, the camera being arranged to utilize the estimated activity if, for a predetermined interval, said estimated activity differs from the manually selected activity indicated by the input information.