Camera system, lens apparatus and camera

A camera system having a camera using a photosensitive member to record an optical image, and a lens apparatus removably mounted on said camera and forming an optical image with an image taking optical system including a focus lens,

• the camera system comprising:
• a focus detection unit provided for said camera and detecting a focus adjustment state of said image taking optical system;
• a photosensitive member information storage circuit provided for said camera and storing information about said photosensitive member;
• a lens driving unit provided for said lens apparatus and driving said focus lens for achieving an in-focus state;
• and
• a control circuit for controlling said lens driving unit,
• wherein said control circuit is provided for said lens apparatus or said camera, and said control circuit sets information about a driving pattern of said lens driving unit in accordance with the information about said photosensitive member stored in said photosensitive member information storage circuit, and uses the set information about the driving pattern to control said lens driving unit based on information detected by said focus detection unit.

A lens apparatus for forming an optical image with a picture taking optical system including a focus lens, the lens apparatus being removably mounted on a camera using a photosensitive member to record an optical image, the camera comprising a focus detection unit for detecting a focus adjustment state of said image taking optical system and a photosensitive member information storage circuit for storing information about said photosensitive member, the lens apparatus comprising:

• a lens driving unit for driving said focus lens;
• a communication circuit for performing information communication between said lens apparatus and said camera;
• and
• a control circuit for controlling said lens driving unit,
• wherein said control circuit acquires the information about said photosensitive member stored in said photosensitive member information storage circuit and the information detected by said focus detection unit through said communication circuit, sets a driving pattern of said lens driving unit in accordance with the information about said photosensitive member, and uses information about the set driving pattern to control said lens driving unit based on the information detected by said focus detection unit.

A camera using a photosensitive member to record an optical image on which a lens apparatus for forming an optical image with an image taking optical system including a focus lens is removably mounted, the camera comprising:

• a focus detection unit for detecting a focus adjustment state of said image taking optical system;
• a photosensitive member information storage circuit for storing information about said photosensitive member;
• and
• a communication circuit for performing information communication between said camera and said lens apparatus,
• wherein information detected by said focus detection unit and the information about said photosensitive member stored in said photosensitive member information storage circuit are transmit to said lens apparatus through said communication circuit.