A retractable lens barrel includes a rear holder which holds a first
optical element, and is movable along the axis thereof between an
operational retracted positions; an annular member movable relative to
the rear holder without rotation; a retractable holder holding a second
optical element, and movable between an aligned position where the second
optical element is aligned with the axis and a displaced position where
the second optical element is displaced relative to the axis; a position
control device controlling the annular member and retractable holder to
move between an operational position at the aligned position and a
retracted position at the displaced position. The rear holder and the
retractable holder having contact surfaces which contact each other only
if movement of the annular member and retractable holder to the retracted
position occurs and the rear holder has not fully moved to the retracted
position.