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

An image capturing apparatus comprising

• one or more processors and/or circuitry configured to:
• detect a rotation angle of a holding unit that holds an imaging unit including an image sensor and an optical system including a focus lens and that has a rotation unit that rotates the imaging unit;
• control a position of the focus lens to perform focus adjustment;
• and
• in a case where the rotation angle of the holding unit is detected, calculate a correction amount for correcting a shift of an in-focus position according to a change amount of a distance between the imaging unit and a subject on which the focus adjustment is performed corresponding to the rotation angle;
• and
• the imaging unit;
• and
• the holding unit,
• wherein the one or more processors and/or circuitry are configured such that:
• the focus adjustment is capable of being performed in an autofocus (AF) mode that focuses on the subject based on a signal obtained from the image sensor,
• the correction amount is calculated in a case where the focus adjustment is not performed in the AF mode and the subject is tracked using the rotation unit, and
• the position of the focus lens is controlled based on the correction amount.

An image capturing system comprising:

• one or more processors and/or circuitry which configured to:
• detect a rotation angle of a holding unit that holds an imaging unit including an image sensor and an optical system including a focus lens and that has a rotation unit that rotates the imaging unit;
• control a position of the focus lens to perform focus adjustment;
• and
• in a case where the rotation angle of the holding unit is detected, calculate a correction amount for correcting a shift of an in-focus position according to a change amount of a distance between the imaging unit and a subject on which the focus adjustment is performed corresponding to the rotation angle;
• the imaging unit;
• and
• the holding unit,
• wherein the one or more processors and/or circuitry are configured such that:
• the focus adjustment is capable of being performed in an autofocus (AF) mode that focuses on the subject based on a signal obtained from the image sensor,
• the correction amount is calculated in a case where the focus adjustment is not performed in the AF mode and the subject is tracked using the rotation unit, and
• the position of the focus lens is controlled based on the correction amount, and
• the imaging unit is detachable from the holding unit.

A focus adjustment method comprising:

• detecting a rotation angle of a holding unit that holds an imaging unit including an image sensor and an optical system including a focus lens and that has a rotation unit that rotates the imaging unit;
• controlling a position of the focus lens to perform focus adjustment;
• determining whether or not focus adjustment is performed in an autofocus (AF) mode that focuses on a subject based on a signal obtained from the image sensor;
• calculating a correction amount for correcting a shift of an in-focus position according to a change amount of a distance between the imaging unit and the subject on which the focus adjustment is performed corresponding to the detected rotation angle in a case where the focus adjustment is not performed in the AF mode and the subject is tracked using the rotation unit, and
• correcting the position of the focus lens based on the correction amount.

A non-transitory computer-readable storage medium storing a program that is executable by the computer, wherein the program includes program code for causing the computer to function as a focus adjustment apparatus comprising one or more processors and/or circuitry configured to:

• detect a rotation angle of a holding unit that holds an imaging unit including an image sensor and an optical system including a focus lens and that has a rotation unit that rotates the imaging unit;
• control a position of the focus lens to perform focus adjustment;
• and
• in a case where the rotation angle of the holding unit is detected, calculate a correction amount for correcting a shift of an in-focus position according to a change amount of a distance between the imaging unit and a subject on which the focus adjustment is performed corresponding to the rotation angle,
• wherein the one or more processors and/or circuitry are configured such that:
• the focus adjustment is capable of being performed in an autofocus (AF) mode that focuses on the subject based on a signal obtained from the image sensor,
• the correction amount is calculated in a case where the focus adjustment is not performed in the AF mode and the subject is tracked using the rotation unit, and
• the position of the focus lens is controlled based on the correction amount.