Imaging apparatus and control method thereof

An imaging apparatus comprising:

• an imaging element configured to have include a plurality of microlenses, each with a corresponding first photoelectric converter and a corresponding second photoelectric converter, each of the first photoelectric converter and the second photoelectric converter being configured to convert an optical image of an object formed by an imaging optical system into an image signal, wherein the imaging element outputs (a) a first signal corresponding to the first photoelectric converter and the second photoelectric converter or (b) the first signal and a second signal, the second signal corresponding to either one of the first photoelectric converter unit or the second photoelectric converter;
• a focus detection unit configured to perform focus detection based on the first signal and the second signal;
• and
• a control unit configured to (a) perform control of extending a frame period of time of a moving image with respect to a region where the focus detection unit performs the focus detection and (b) perform control of the focus adjustment of the imaging optical system,
• wherein (1) if an exposure time is a first time, the control unit carries out control to extend the frame period of time of the moving image, as compared with a case where the exposure time is a second time that is shorter than the first time, or (2) if a sensitivity is a first sensitivity, the control unit carries out control to extend the frame period of time of the moving image, as compared with a case where the sensitivity is a second sensitivity that is lower than the first sensitivity.

A control method executed by an imaging apparatus including an imaging element, the imaging element including a plurality of microlenses, each with a corresponding first photoelectric converter and a corresponding second photoelectric converter, each of the first photoelectric converter and the second photoelectric converter being configured to convert an optical image of an object formed by an imaging optical system into an image signal, wherein the imaging element outputs (a) a first signal corresponding to the first photoelectric converter and the second photoelectric converter or (b) the first signal and a second signal, the second signal corresponding to either of the first photoelectric converter or the second photoelectric converter, the method comprising:

• performing focus detection based on the first signal and the second signal;
• and
• performing (a) control of changing a readout line that reads the first signal and the second signal in a region where the focus detection is performed, and (b) control of the focus adjustment of the imaging optical system,
• wherein (1) if an exposure time is a first time, control is carried out to increase a number of lines for reading the first signal and the second signal and to decrease a number of lines for reading the first signal and not reading the second signal, as compared with a case where the exposure time is a second time that is shorter than the first time, or (2) if a sensitivity is a first sensitivity, control is carried to increase the number of lines for reading the first signal and the second signal and to decrease the number of lines for reading the first signal and not reading the second signal, as compared with a case where the sensitivity is a second sensitivity that is lower than the first sensitivity.