Focus adjustment apparatus, image capturing apparatus, focus adjustment method, and storage medium

1. A focus adjustment apparatus comprising:

at least one processor which functions as:

a setting unit configured to set an autofocus (AF) setting from a plurality of items including at least one of a setting prescribing a target range and a setting prescribing a target subject type;

a determination unit configured to execute determination processing for determining a main subject from one or more subjects based on the AF setting; and

a focus adjustment unit configured to perform a focus adjustment on a target position determined based on the determined main subject; and

one or more operation members,

wherein individual setting contents of the AF setting are associated with individual operation members of the one or more operation members, and

wherein the setting unit is configured to change the AF setting, in response to an individual operation member of the one or more operation members switching to an active state, so as to reflect a setting content associated with the individual operation member, and to change the AF setting, in response to the individual operation member switching to an inactive state, so as to cancel reflection of the setting content associated with the individual operation member.

2. The focus adjustment apparatus according to claim 1 ,

wherein in a case where the AF setting is changed so as to change the target subject type, the determination unit executes the determination processing independently of the main subject determined in a previous execution of determination processing.

3. The focus adjustment apparatus according to claim 2 , wherein, even if the AF setting is changed so as to change the target subject type, the determination unit executes the determination processing based on the main subject determined in the previous execution of determination processing in a case where the target subject type set before the change or after the change is pupil.

4. The focus adjustment apparatus according to claim 1 ,

wherein the plurality of items includes a setting prescribing whether the focus adjustment by the focus adjustment unit is to be performed only once or continuously repeated in response to one focus adjustment instruction by a user, and

in a case where the AF setting is changed so as to continuously repeat the focus adjustment by the focus adjustment unit in response to the one focus adjustment instruction, the determination unit executes the determination processing based on the main subject determined in a previous execution of determination processing.

5. The focus adjustment apparatus according to claim 1 ,

wherein in a case where the AF setting is changed so as to reduce the target range, the determination unit executes the determination processing independently of the main subject determined in a previous execution of determination processing.

6. The focus adjustment apparatus according to claim 5 , wherein in a case where the AF setting is changed so as to enlarge the target range, the determination unit executes the determination processing based on the target position determined based on the main subject determined in the previous execution of determination processing.

7. The focus adjustment apparatus according to claim 6 , wherein executing the determination processing based on the target position determined based on the main subject determined in the previous execution of determination processing includes restricting the target range of the determination processing within a prescribed range from the target position.

8. The focus adjustment apparatus according to claim 7 , wherein the prescribed range is determined based on a size of the target range prescribed by the AF setting.

9. The focus adjustment apparatus according to claim 1 ,

wherein in a case where the AF setting is changed so as to enlarge the target range, the determination unit executes the determination processing based on the target position determined based on the main subject determined in a previous execution of determination processing.

10. The focus adjustment apparatus according to claim 1 ,

wherein in a case where the AF setting is changed in response to an individual operation member of the one or more operation members switching to an inactive state, and where all of the one or more operation members are in an inactive state, the determination unit executes the determination processing independently of the main subject determined in a previous execution of determination processing, regardless of the change content of the AF setting.

11. The focus adjustment apparatus according to claim 1 , wherein the at least one processor and/or at least one circuit further functions as:

a display control unit configured to control whether to display an image of a shooting range on a display,

wherein, in a case where the AF setting is changed in a state where the image of the shooting range is not displayed on the display, the determination unit executes the determination processing independently of the main subject determined in a previous execution of determination processing regardless of the change content of the AF setting.

12. An image capturing apparatus comprising:

the focus adjustment apparatus according to claim 1 ; and

an image sensor.

13. A focus adjustment method executed by a focus adjustment apparatus, the method comprising:

setting an autofocus (AF) setting from a plurality of items including at least one of a setting prescribing a target range and a setting prescribing a target subject type;

executing a determination processing for determining a main subject from one or more subjects based on the AF setting; and

performing a focus adjustment on a target position determined based on the determined main subject,

wherein individual setting contents of the AF setting are associated with individual operation members of one or more operation members, and

wherein the setting changes the AF setting, in response to an individual operation member of the one or more operation members switching to an active state, so as to reflect a setting content associated with the individual operation member, and changes the AF setting, in response to the individual operation member switching to an inactive state, so as to cancel reflection of the setting content associated with the individual operation member.

14. A non-transitory computer-readable storage medium which stores a program for causing a computer to execute a focus adjustment method comprising:

setting an autofocus (AF) setting from a plurality of items including at least one of a setting prescribing a target range and a setting prescribing a target subject type;

executing a determination processing for determining a main subject from one or more subjects based on the AF setting; and

performing a focus adjustment on a target position determined based on the determined main subject,

wherein individual setting contents of the AF setting are associated with individual operation members of one or more operation members, and

wherein the setting changes the AF setting, in response to an individual operation member of the one or more operation members switching to an active state, so as to reflect a setting content associated with the individual operation member, and changes the AF setting, in response to the individual operation member switching to an inactive state, so as to cancel reflection of the setting content associated with the individual operation member.