shown in fig1 for example in this case the imaging optical unit 31 adjusts the focal position in accordance with the rotation direction and the rotation amount of the dial the still image capturing operation unit 23 receives a user 39 s operation for capturing a still image the still image capturing operation unit 23 includes a pressing button as shown in fig1 for example in this case the imaging device 1 captures a still image in accordance with pressure applied to the button thereby acquiring image data of the still image the mode operation unit 24 receives a user 39 s operation for switching the operation mode of the imaging device 1 herein operation modes of the imaging device 1 are broadly divided into a shooting mode and a playback mode for example the mode operation unit 24 includes a pressing button as shown in fig1 for example in this case the imaging device 1 switches the operation mode between the shooting mode and the playback mode in accordance with pressure applied to the button note that the shooting mode is an operation mode for capturing an image of a subject by operating the imaging optical unit 31 the signal conversion unit and the like meanwhile the playback mode is an operation mode for playing back the image data acquired in the shooting mode for example the details of such operation modes are described below.