An optical apparatus is disclosed which comprises an optical system provided
with
a zoom lens for performing zooming by moving along the optical axis and a focus
lens for performing correction and focusing at the time of zooming, an imaging
device for imaging an optical image supplied from the optical system, a zoom actuator
for driving the zoom lens, a focus actuator for driving the focus lens, a zoom
position detecting device for detecting the position of the zoom lens, a focus
position detecting device for detecting the position of the focus lens, an aperture
stop member whose opening diameter changes so as to adjust the luminous energy
passing through the optical system a filter member to be freely inserted into or
extracted from the optical path of the optical system, an aperture stop state detecting
device for detecting the opening state of the aperture stop member, a filter state
detecting device for detecting the insertion state of the filter member, a memory
storing the movement information on the relation between the position of the zoom
lens for keeping a focused state and the position of the focus lens, and a control
device for correcting the movement information in accordance with an output of
the aperture stop state detecting device and an output of the filer state detecting
device and controlling driving of the focus lens.
