| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate erroneous detecting action a of shake detection means by preventing the vibration of air generated in a camera main body from being propagated to the shake detection means. SOLUTION: A first lens L1 is fixed to a first mirror group 4. A second lens group L2 is not moved in the optical axis direction and it is held so that it can be moved only in a direction making right angles with the optical axis with respect to a shake correction unit 5 in order to correct the shake in the case of zooming. A third lens group L3 is fixed to a third lens group barrel 6 and a fourth lens group L4 which is not moved in the case of the zooming is fixed to a fourth mirror group 8. A fifth lens group L5 is held by a fifth lens group barrel 9. Then, the back side of the lens barrel is perfectly hermetically sealed by a sixth lens group L6, a back cover 17, contact parts 19 and a mount 16. By attaching the lens barrel to a camera main body in such a way, noise generated by the standing-up action of the mirror and the actuation of a shutter is prevented from being propagate din the air through both mounts of the camera and the lens and arriving at a sensor when a photographing action is executed.</p> |
