Accessory apparatus, image pickup apparatus, control method, and storage medium

1 . An accessory apparatus attachable to an image pickup apparatus, the accessory apparatus comprising:

a first optical system;

a second optical system arranged in parallel with the first optical system; and

a processor configured to control the first optical system and the second optical system,

wherein the processor has a first mode for simultaneously driving the first optical system and the second optical system, and a second mode for independently driving the first optical system and the second optical system,

wherein the processor is configured to vary a timing of changing from the first mode to the second mode according to an imaging state, and

wherein in a case where the processor receives a change instruction from the first mode to the second mode while the first mode is set, and the imaging state is a predetermined state, the processor is configured to maintain a setting of the first mode while the imaging state is the predetermined state.

2 . The accessory apparatus according to claim 1 , wherein the processor is configured to change a setting of the first mode to a setting of the second mode after the predetermined state of the imaging state ends.

3 . The accessory apparatus according to claim 1 , wherein the processor is configured to acquire information on the imaging state from the image pickup apparatus, and

wherein the predetermined state is at least one of ongoing moving-image capturing and an ongoing continuous still-image capturing.

4 . The accessory apparatus according to claim 1 , wherein the processor is configured to acquire information on the imaging state from the image pickup apparatus based on a state of an imaging operation unit operable by a user of the image pickup apparatus, and

wherein the predetermined state is a state in which the imaging operation unit is being pressed.

5 . The accessory apparatus according to claim 1 , wherein the processor is configured to acquire the change instruction based on a first communication command received from the image pickup apparatus.

6 . The accessory apparatus according to claim 1 , wherein the processor is configured to acquire the change instruction based on a state of a mode setting unit operable by a user.

7 . The accessory apparatus according to claim 6 , wherein in a case where the processor receives from the image pickup apparatus a second communication command instructing to perform the change instruction based on a first communication command, the processor is configured not to change from the first mode to the second mode regardless of the change instruction based on a state of a mode setting unit operable by the user of the image pickup apparatus.

8 . The accessory apparatus according to claim 1 , wherein the accessory apparatus is a lens apparatus.

9 . The accessory apparatus according to claim 1 , wherein the accessory apparatus is an adapter attachable to the image pickup apparatus directly or via a lens apparatus.

10 . An image pickup apparatus attachable to and detachable from an accessory apparatus that includes a first optical system, and a second optical system arranged in parallel with the first optical system, the image pickup apparatus comprising:

a processor configured to control the first optical system and the second optical system by communicating with the accessory apparatus,

wherein the processor has a first mode for simultaneously driving the first optical system and the second optical system, and a second mode for independently driving the first optical system and the second optical system,

wherein the processor is configured to vary a timing of changing from the first mode to the second mode according to an imaging state, and

wherein in a case where the processor receives a change instruction from the first mode to the second mode while the first mode is set, and the imaging state is a predetermined state, the processor is configured to maintain a setting of the first mode while the imaging state is the predetermined state.

11 . The image pickup apparatus according to claim 10 , wherein the processor is configured to change a setting of the first mode to a setting of the second mode after the predetermined state of the imaging state ends.

12 . The accessory apparatus according to claim 10 , wherein in a case where the processor receive a predetermined imaging instruction while the processor is in the second mode, the processor is configured to change the second mode to the first mode and then to permit imaging.

13 . A control method for an optical apparatus comprising the steps of:

simultaneously driving a first optical system and a second optical system arranged in parallel with the first optical system in a first mode;

acquiring a change instruction from the first mode to a second mode in which the first optical system and the second optical system are independently driven; and

changing from the first mode to the second mode in accordance with the change instruction,

wherein a timing of changing from the first mode to the second mode is changed depending on an imaging state, and

wherein, in a case where the change instruction from the first mode to the second mode is received while the first mode is set, and the imaging state is a predetermined state, the first mode is maintained while the imaging state is the predetermined state.

14 . A non-transitory computer-readable storage medium storing a program for causing a computer to execute the control method according to claim 13 .