| 摘要 |
A wide-angle lens system includes a negative first lens group and a positive second lens group with a diaphragm, in this order from an object. Upon focusing, the positive second lens group is arranged to be moved along the optical axis. The wide-angle lens system satisfies the following conditions:whereinTL2 designates the distance, in the second lens group, between the most object-side surface of the most object-side lens element and the most image-side surface of the most image-side lens element;f designates the focal length of the entire lens system when an object at an infinite distance is in an in-focus state;f1 designates the focal length of the first lens group; andf2 designates the focal length of the second lens group.
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