Camera featuring a single drive source and a plurality of selectable drive transmission mechanisms

A drive force transmission apparatus, comprising:

• a first rotation portion which rotates and thereby transmits a drive force;
• a second rotation portion which rotates and revolves around said first rotation portion in association with rotation of said first rotation portion;
• a plurality of drive force transmission portions which selectively mesh with said second rotation portion by revolution of said second rotation portion around said first rotation portion, and thereby selectively transmit the drive force from said first rotation portion through said second rotation portion to a selected one of said plurality of drive force transmission portions;
• a restriction device which restricts revolution of said second rotation portion at a predetermined revolution position;
• and
• a determination device which determines a revolution position of said second rotation portion, said determination device causing said second rotation portion to revolve in a first direction to a position at which revolution of said second rotation portion is restricted by said restriction device, and then causing said second rotation portion to revolve in a second direction, different from the first direction, to determine the revolution position from the amount of revolution in the second direction.

An operation control apparatus for a camera, comprising:

• a movement device reciprocally movable to perform a forward movement and a return movement;
• an abutment device;
• and
• a control device which causes said movement device to perform a forward movement to abut against said abutment device at a first position and to perform a return movement, determines whether said movement device has moved a predetermined amount to a second position which is different from the first position by the return movement, and causes said movement device to initiate a predetermined action in response to a determination that said movement device has moved the predetermined amount by the return movement.

A camera, comprising:

• a movement device reciprocally movable to perform a forward movement and a return movement;
• an abutment device;
• and
• a control device which causes said movement device to perform a forward movement to abut against said abutment device at a first position, causes said movement device to perform a return movement, determines whether said movement device has moved a predetermined amount to a second position which is different from the first position by the return movement, and causes said movement device to initiate a predetermined action in response to a determination that said movement device has moved the predetermined amount by the return movement.