| 摘要 |
Superzoom lenses are disclosed. The superzoom lenses include, in order from an object side to an image side on an optical axis, a first lens group, a second lens group, an aperture, a third lens group, and a fourth lens group. The first lens group has positive optical power. The second lens group has negative optical power and is consisted of a convex lens and a concave lens. The third lens group has positive optical power. The fourth lens group has positive optical power. The superzoom lenses satisfy the following relationship when the superzoom lenses are collapsed: 3≦̸Lw/ID<5 wherein Lw stands for the optical path length, and ID stands for the diameter of the image circle.
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