Patent ID: 9618723
Date: 2017-04-11
CPC Classifications: G02B,G03B,H04N

Claim:
1. An image capturing apparatus to which a lens unit having an optical imaging system is attachable, comprising: an image sensor configured to generate an image signal by performing photoelectric conversion on a light flux passing through the optical imaging system; a processor performing the functions of a first calculation unit, the first calculation unit configured to obtain first control information for focus control by using a signal output from the image sensor; a controller performing the functions of a second calculation unit, the second calculation unit configured to perform communication control between the lens unit and the image capturing apparatus, obtain second control information for focus control without using a signal output from the image sensor, and transmit the second control information to the lens unit; and a communication switching circuit performing the functions of a switching unit, the switching unit configured to switch between the first calculation unit and the second calculation unit that communicates with the lens unit, wherein the first calculation unit transmits the first control information to the lens unit without mediation of the second calculation unit, and wherein the second calculation unit determines which of the first calculation unit and the second calculation unit is to be used for communication with the lens unit, and outputs a signal for controlling the switching unit.