Image capturing apparatus having image sensor rotatable in plane intersecting optical axis and method controlling the same

An image capturing apparatus comprising:

• an image sensor held so as to be rotatable in a plane intersecting an optical axis, the image sensor being configured to accumulate electric charges at a different timing for each area;
• a light shielding unit including a first light shielding member and a second light shielding member that block a light beam toward the image sensor;
• a determination unit configured to determine an exposure time of the image sensor;
• and
• a control unit configured to select and execute one of first control to start exposure of the image sensor in response to movement of the first light shielding member and terminate the exposure of the image sensor in response to movement of the second light shielding member, and second control to start exposure of the image sensor and terminate the exposure of the image sensor in response to movement of the second light shielding member,
• wherein the control unit selects one of the first control and the second control based on a threshold according to information about the rotation of the image sensor and the determined exposure time,
• wherein, when the determined exposure time is less than or equal to the threshold, the control unit selects the second control, and when the determined exposure time is not less than or equal to the threshold, the control unit selects the first control,
• wherein the control unit sets the threshold based on one of whether a horizontal correcting function for rotating the image sensor to orient a lateral direction of a picture composition horizontally is enabled and whether a blur correcting function for rotating the image sensor is enabled,
• wherein, when the horizontal correcting function is not enabled and the blur correcting function is not enabled, the control unit sets the threshold to a first threshold,
• wherein, when the horizontal correcting function is not enabled and the blur correcting function is enabled, the control unit sets the threshold to a second threshold,
• wherein, when the horizontal correcting function is enabled and the blur correcting function is not enabled, the control unit sets the threshold to a third threshold,
• wherein, when the horizontal correcting function is enabled and the blur correcting function is enabled, the control unit sets the threshold to a fourth threshold, and
• wherein the first threshold is an exposure time shorter than the second threshold, the second threshold is an exposure time shorter than the third threshold, and the third threshold is an exposure time shorter than the fourth threshold.