A drive controller of a lens apparatus including a first lens unit movable
to perform manual focus and a second lens unit disposed closer to an
image than the first lens unit. The drive controller includes a detection
device detecting a focal state of the lens apparatus, a storage device
storing the detected focal state, and a control device controlling focus
by driving the second lens unit to a focal position based on the detected
focal state. The control device performs a compensation operation on the
manual focus with the focus control after completion of the manual focus.
The drive controller eliminates a clutch mechanism for selecting drive
systems for the manual focus and focus adjustment and performs a focus
adjustment (a compensation operation) after completion of the manual
focus while minimizing a space needed for a rear focus unit to move.