Camera, setting method of camera, and setting program of camera

A camera comprising:

• a rotary operation dial;
• a plurality of contact detection units that are provided on a top surface of the operation dial, and an item to be set by the operation dial is set for each contact detection unit;
• a switching unit that switches between validity and invalidity of a setting change of the item set for each contact detection unit according to a detection result of the contact detection unit;
• a setting change unit that changes a setting of an item whose setting change is valid in response to an operation of the operation dial;
• a dial display section provided on the top surface of the operation dial;
• and
• a dial display control unit that displays information on the item set in the contact detection unit on the dial display section in association with a disposition of the contact detection unit,
• wherein the dial display control unit displays information on the item whose setting change is valid and information on the item whose setting change is invalid in a different form.