A device (102, 152, 172) comprising: a head-mountable frame comprising a housing arranged on at least one side arm (114, 173), wherein the housing is formed by a union of a superior surface, an inferior surface, an anterior surface, a posterior surface and two side surfaces; a first input interface arranged on either the superior surface or the inferior surface of the housing; a second input interface arranged on a surface of the housing that is opposite to the first input interface; and a control system configured to: receive first input data from the first input interface, wherein the first input data corresponds to a first input action, and responsive to the receipt of the first input data, cause a camera (156, 178) of the device to perform a first camera operation in accordance with the first input action, and receive second input data from the second input interface, wherein the second input data corresponds to one or more second input actions on the second input interface, and responsive to the receipt of the second input data, cause the camera to perform a second camera operation that is different from the first camera operation, wherein a camera operation comprises an adjustment, modification, or selection of one or more camera parameters. a head-mountable frame comprising a housing arranged on at least one side arm (114, 173), wherein the housing is formed by a union of a superior surface, an inferior surface, an anterior surface, a posterior surface and two side surfaces; a first input interface arranged on either the superior surface or the inferior surface of the housing; a second input interface arranged on a surface of the housing that is opposite to the first input interface; and a control system configured to: receive first input data from the first input interface, wherein the first input data corresponds to a first input action, and responsive to the receipt of the first input data, cause a camera (156, 178) of the device to perform a first camera operation in accordance with the first input action, and receive second input data from the second input interface, wherein the second input data corresponds to one or more second input actions on the second input interface, and responsive to the receipt of the second input data, cause the camera to perform a second camera operation that is different from the first camera operation, wherein a camera operation comprises an adjustment, modification, or selection of one or more camera parameters. receive first input data from the first input interface, wherein the first input data corresponds to a first input action, and responsive to the receipt of the first input data, cause a camera (156, 178) of the device to perform a first camera operation in accordance with the first input action, and receive second input data from the second input interface, wherein the second input data corresponds to one or more second input actions on the second input interface, and responsive to the receipt of the second input data, cause the camera to perform a second camera operation that is different from the first camera operation, wherein a camera operation comprises an adjustment, modification, or selection of one or more camera parameters.