Imaging system, imaging apparatus, lens unit, and method of controlling imaging system

A control method of a lens apparatus that is capable of being mounted to a camera apparatus and comprises an imaging optical system including a lens, the method comprising:

• communicating with a camera apparatus,
• controlling communication of driving of the lens;
• transmitting a first information for converting a focus detection signal to a driving amount of the lens and a second information corresponding to a change of the first information according to an image height;
• controlling driving of the lens based on a control signal indicating the driving amount of the lens;
• and
• transmitting the second information in every focus detection timing under a control mode in which the focus detection is performed for focus detection regions at different timings.

An imaging apparatus comprising:

• at least one processor executing computer executable instructions or at least one circuit which functions as:
• a communication unit configured to communicate with a unit provided with a focus adjustment lens;
• a detection unit configured to acquire a focus detection signal in a plurality of regions;
• and
• a control unit configured to generate a control signal for controlling driving of the lens based on the focus detection signal and transmit the control signal to the lens unit through the communication unit,
• wherein the control unit acquires, through the communication unit from the lens unit, a first information for converting a focus detection signal to a driving amount of the lens and a second information corresponding to a change of the first information according to an image height,
• wherein the control unit selects a region used to control the driving of the lens from the plurality of the regions after acquiring the first information and the second information,
• wherein the control unit generates the driving amount of the lens as the control signal from the first information and the second information depending on the image height of the selected region, and
• wherein the control unit acquires at least the first information from the lens unit in every focus detection timing under a control mode in which the focus detection is performed for the plurality of the plurality of regions at different timings.

A control method of an imaging apparatus, the method comprising:

• communicating with a lens unit provided with a focus adjustment lens;
• acquiring a focus detection signal in a plurality of regions;
• generating a control signal for controlling driving of the lens based on the focus detection signal and transmit the control signal to the lens unit;
• acquiring, from the lens unit, a first information for converting a focus detection signal to a driving amount of the lens and a second information corresponding to a change of the first information according to an image height;
• selecting a region used to control the driving of the lens from the plurality of the regions after acquiring the first information and the second information;
• generating the driving amount of the lens as the control signal from the first information and the second information depending on the image height of the selected region, and
• acquiring at least the first information from the lens unit in every focus detection timing under a control mode in which the focus detection is performed for the plurality of regions at different timing.