| 摘要 |
PURPOSE:To transfer satisfactorily a focal distance range by a simple structure by dividing a relay lens group into two lens groups, and transferring the focal distance range by moving the lens group provided on an object field side in said groups. CONSTITUTION:A zooming lens is constituted of a focusing lens group I , a variator lens group II, a compensator lens group III, a relay lens front group IV, and a relay lens rear group V. The relay lens front group IV, namely, the relay lens group of an object field side is brought close to the object field side, and zooming is executed by the zooming lens groups II, III. |
