Camera body, camera accessory, and information transmission method

A camera accessory to which a camera body is detachably mounted, the camera accessory comprising:

• a detection unit that detects blurring and outputs a detection signal;
• a movable unit that is movable to correct image blurring generated by the blurring;
• a calculation unit that calculates a moving distance of the movable unit using the detection signal and a state of the blurring;
• a determination unit that determines the state of the blurring using the detection signal;
• and
• a first communication unit that receives, from the camera body and as information indicating the state of the blurring used by the calculation unit, a body-side blurring state obtained by determining a state of blurring detected in the camera body.

A method of transmitting information between a camera accessory detachably mounted to a camera body and the camera body, the method comprising:

• the camera body detecting blurring of the camera body and outputting a detection signal;
• the camera body determining a state of the blurring of the camera body based on the detection signal detected by the camera body;
• the camera accessory detecting blurring of the camera accessory and outputting a detection signal;
• the camera accessory determining a state of the blurring of the camera accessory based on the detection signal detected by the camera accessory;
• the camera accessory performing control of blur correction using the detection signal and either (i) the state of the blurring of the camera body or (ii) the state of the blurring of the camera accessory;
• and
• information indicating the state of the blurring used by the camera accessory in performing control of blur correction is transmitted from the camera body to the camera accessory.

A camera accessory to which a camera body is detachably mounted, the camera accessory comprising:

• a detection unit that detects blurring and outputs a detection signal;
• a movable unit that is movable to correct image blurring generated by the blurring;
• a calculation unit that calculates a moving distance of the movable unit using the detection signal and a state of the blurring;
• a determination unit that determines the state of the blurring using the detection signal;
• a first communication unit that receives, from the camera body, information indicating the state of the blurring used by the calculation unit;
• and
• a second communication unit that transmits the state of the blurring determined by the determination unit to the camera body.