A camera system which controls the driving of a focus lens through overlap
control with a high degree of accuracy, is disclosed. The camera system
comprises a lens apparatus with an image-taking optical system and a
camera on which the lens apparatus is mountable. The camera system
comprises a focus detection unit detecting a focusing state of the
image-taking optical system, a driving unit driving the focus lens unit,
and a controller controlling the driving speed of the focus lens unit and
controls the focus detection unit to perform a focus detection operation
at least once while the focus lens unit is moved. The controller sets the
driving speed of the focus lens unit at the time of at least a final focus
detection operation while it is moved toward an in-focus position, to a
speed decelerated from the driving speed before the final focus detection
operation.
