Abstract: An accessory detachably attached to an electronic apparatus includes an accessory processing unit communicable with an electronic apparatus by a first communication method as communication via a first contact group, and by a second communication method as communication via a second contact group different from the first contact group. The accessory processing unit controls the communication by the second communication method based on information communicated by the first communication method, executes communication via a second contact included in the second contact group in the second communication method, in response to a change in a signal level of a signal via a first contact included in the second contact group from a first signal level to a second signal level, and executes communication by the second communication method based on information on the second signal level included in the information communicated by the first communication method.

Abstract: An accessory detachably attached to an electronic apparatus includes an accessory processing unit communicable with an electronic apparatus by a first communication method as communication via a first contact group, and by a second communication method as communication via a second contact group different from the first contact group. The accessory processing unit controls the communication by the second communication method based on information communicated by the first communication method, executes communication via a second contact included in the second contact group in the second communication method, in response to a change in a signal level of a signal via a first contact included in the second contact group from a first signal level to a second signal level, and executes communication by the second communication method based on information on the second signal level included in the information communicated by the first communication method.

Abstract: An image capturing apparatus capable of focus detection includes a sensor including a plurality of pixels, the sensor being capable of changing an accumulation time of the pixels for each of a plurality of regions including the plurality of pixels, an accumulation control unit that, in accordance with a state or a setting of the image capturing apparatus, changes accumulation control of the pixels for each of the plurality of regions, and a defocus computation unit that calculates a defocus amount using signals from the pixels for which accumulation has been controlled by the accumulation control unit.

Abstract: An image capturing apparatus capable of focus detection includes a sensor including a plurality of pixels, the sensor being capable of changing an accumulation time of the pixels for each of a plurality of regions including the plurality of pixels, an accumulation control unit that, in accordance with a state or a setting of the image capturing apparatus, changes accumulation control of the pixels for each of the plurality of regions, and a defocus computation unit that calculates a defocus amount using signals from the pixels for which accumulation has been controlled by the accumulation control unit.

Abstract: A focus detection apparatus, comprising: an image sensor having a plurality of pixels arranged two-dimensionally; a drive control unit configured to cause exposure for accumulation times that differ in respective pixel rows of the image sensor to be performed; and a focus detection unit configured to detect a defocus amount by using a signal obtained from pixels of a line that includes pixels of a plurality of pixel rows, wherein the focus detection unit detects the defocus amount based on accumulation times of pixel rows corresponding to each pixel included in the line.

Abstract: An image capturing apparatus includes an area sensor in which photoelectric conversion elements are arranged two-dimensionally, the sensor having a plurality of regions; an exposure control unit that causes the area sensor to be exposed at a given exposure time so that accumulation ends at substantially the same time for the plurality of regions, and reads out, in order, image signals accumulated as a result of the exposure, and a focus detection unit that carries out focus detection using a signal read out from the area sensor, wherein the exposure control unit carries out control for prioritizing the readout of signals from the photoelectric conversion elements in a region or regions among the plurality of regions.

Abstract: A focus detection apparatus, comprising: an image sensor having a plurality of pixels arranged two-dimensionally; a drive control unit configured to cause exposure for accumulation times that differ in respective pixel rows of the image sensor to be performed; and a focus detection unit configured to detect a defocus amount by using a signal obtained from pixels of a line that includes pixels of a plurality of pixel rows, wherein the focus detection unit detects the defocus amount based on accumulation times of pixel rows corresponding to each pixel included in the line.

Abstract: A focus detection apparatus comprises: a sensor unit, having a plurality of photoelectric conversion elements for receiving light that passed through an imaging optical system and accumulating charge, configured to generate an image signal to be used for correlation calculation for focus detection based on the accumulated charge; a control unit configured to control the photoelectric conversion elements to stop charge accumulation in a case where a first signal that represents contrast of the image signal reaches a predetermined voltage level; and a voltage level setting unit. The voltage level setting unit sets a larger voltage level in a first case, in which luminance change in a direction of the correlation calculation in the plurality of the photoelectric conversion elements is gentler than a second case, than in the second case.

Abstract: A focus detection apparatus comprises: a sensor unit provided with a plurality of sensor pairs, including a first and second sensor pairs, each of which receives a light beam from an object, accumulates charge, and outputs a pair of image signals for focus detection; a control unit configured to detect a level of a predetermined signal based on the accumulated charge in each sensor pair, and controls charge accumulation time in accordance with the level of the predetermined signal; and a setting unit configured to set a priority of each sensor pair in accordance with the object. The priority of the first sensor pair is set higher than that of the second sensor pair, and the control unit detects the level of the predetermined signal of the first sensor pair in prior to that of the second sensor pair.

Abstract: A focus detection apparatus comprises: a sensor unit, having a plurality of photoelectric conversion elements for receiving light that passed through an imaging optical system and accumulating charge, configured to generate an image signal to be used for correlation calculation for focus detection based on the accumulated charge; a control unit configured to control the photoelectric conversion elements to stop charge accumulation in a case where a first signal that represents contrast of the image signal reaches a predetermined voltage level; and a voltage level setting unit. The voltage level setting unit sets a larger voltage level in a first case, in which luminance change in a direction of the correlation calculation in the plurality of the photoelectric conversion elements is gentler than a second case, than in the second case.

Abstract: A focus detection apparatus comprises: a sensor unit provided with a plurality of sensor pairs, including a first and second sensor pairs, each of which receives a light beam from an object, accumulates charge, and outputs a pair of image signals for focus detection; a control unit configured to detect a level of a predetermined signal based on the accumulated charge in each sensor pair, and controls charge accumulation time in accordance with the level of the predetermined signal; and a setting unit configured to set a priority of each sensor pair in accordance with the object. The priority of the first sensor pair is set higher than that of the second sensor pair, and the control unit detects the level of the predetermined signal of the first sensor pair in prior to that of the second sensor pair.