Abstract: An adapter includes: a first mount section that is detachably attached to a camera body; a second mount section that is provided separately from the first mount section and is detachably attached to any one of a plurality of types of interchangeable lenses which are different from each other in a method of controlling a diaphragm; and an accessory control section that controls the diaphragm of the interchangeable lens in response to a common control command which is received from the camera body regardless of the type of the interchangeable lens mounted on the second mount section.

Abstract: An adapter includes: a first mount section that is detachably attached to a camera body; a second mount section that is provided separately from the first mount section and is detachably attached to an interchangeable lens; and a power supply section that generates supply voltages of a third power supply system and a fourth power supply system, which are to be fed to the interchangeable lens mounted on the second mount section, from a second power supply system between a first power supply system of the camera body, which is mounted on the first mount section, and the second power supply system which is different from the first power supply system.

Abstract: An adapter includes: a first mount section that is detachably attached to a camera body; a second mount section that is provided separately from the first mount section and is detachably attached to an interchangeable lens; and a power supply section that generates supply voltages of a third power supply system and a fourth power supply system, which are to be fed to the interchangeable lens mounted on the second mount section, from a second power supply system between a first power supply system of the camera body, which is mounted on the first mount section, and the second power supply system which is different from the first power supply system.

Abstract: An adapter includes: a first mount section that is detachably attached to a camera body; a second mount section that is provided separately from the first mount section and is detachably attached to an interchangeable lens; and an adapter control section that is capable of communicating between the camera body mounted on the first mount section and the interchangeable lens mounted on the second mount section. The adapter control section provides body transmission lens information for transmission to the camera body, on the basis of lens information requested from the camera body and lens information received from the interchangeable lens, through mutually different methods according to types of the lens information.

Abstract: An adapter includes: a first mount section that is detachably attached to a camera body; a second mount section that is provided separately from the first mount section and is detachably attached to any one of a plurality of types of interchangeable lenses which are different from each other in a method of controlling a diaphragm; and an accessory control section that controls the diaphragm of the interchangeable lens in response to a common control command which is received from the camera body regardless of the type of the interchangeable lens mounted on the second mount section.

Abstract: An exchangeable lens includes: a mount unit at which a camera body is detachably engaged; a plurality of drive target members, conditions of which change as a drive force is applied thereto; an initialization unit that executes initialization processing for each of the plurality of drive target members; an initialization status transmission unit that transmits initialization statuses, each indicating a status of the initialization processing executed for one of the drive target members, to the camera body via a first transmission path over predetermined first cycles; and a drive condition transmission unit that transmits a drive condition of at least one drive target member among the plurality of drive target members to the camera body via a second transmission path different from the first transmission path over predetermined second cycles different from the predetermined first cycles.