| 摘要 |
Rear focusing zoom lens capable of attaining the desired brightness as much as 1.8 in F-number with the zooming ratio of 11x or above, reducing distortion aberration for the photoshooting at the wide-angle end, compensating for axial chromatic aberration and chromatic aberration at the telephoto end, minimizing a diameter of the leading lens piece and the entire length of the lens optics, satisfying a requirement of the reduced weight
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