An optical apparatus has a look-up table provided with control information for
controlling an optimum variable optical-property optical element in accordance
with a distance to an object, a zoom state, or a combination of the distance to
the object with the zoom state. A drive of the variable optical-property optical
element is controlled on the control information obtained from the look-up table
or a predetermined calculation process is executed on the control information obtained
from the look-up table, and information obtained from the calculation process is
used to control the drive of the variable optical-property optical element.