Lens driving device

A camera system comprising;

• a camera body;
• a plurality kinds of interchangeable lenses selectively mountable on said camera body;
• means for detecting a type of said interchangeable lens mounted on said camera body;
• means, including a driving mechanism having a backlash, for driving a focusing lens included in the mounted interchangeable lens along an optical axis of said focusing system;
• means for determining an amount of said backlash in accordance with the type detected by said type detecting means;
• means for detecting a moving direction of said focusing lens;
• means for storing a reference position of said focusing lens;
• means for storing a moving direction of said focusing lens immediately before said focusing lens is stopped at said reference position;
• means for comparing a present moving direction according to said moving direction detecting means with said stored moving direction;
• and
• means for controlling said driving means so that said focusing lens moves through a desired position by a predetermined amount not less than the amount of said backlash, and said focusing lens reversely moves by said predetermined amount when said comparing means detects that said present moving direction is different from said stored moving direction.