| 摘要 |
In a zoom lens ( 30 ) comprising, from the object side to the image side, a front lens group ( 12 ) and a controllable lens group ( 24 ), the controllable lens group comprises two lens elements ( 25, 26 ) having different dispersions and being movable with respect to each other so as to perform a focusing action. One of the lens elements corrects for the dispersion of the zoom lens. Preferably, the zoom lens comprises at least one folding mirror.
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