An optical apparatus is disclosed, which is capable of suppressing an
image blur at the start of zooming. The optical apparatus comprises a
memory storing data indicating the position of a second lens unit
according to the position of a first lens unit, and a controller. The
controller controls the drive width of the second lens unit at a third
position with a first driving condition in a case where the drive of the
first lens unit is started from a first position, and controls the drive
width of the second lens unit at the third position with a second driving
condition in a case where the drive of the first lens unit is started
from a second position. The drive width of the second lens unit at the
third position with the first driving condition is smaller than that with
the second driving condition.