| 摘要 |
In a wide angle lens system, there are arranged, in succession from the object side toward the image side, a divergent first lens group having its surface of smaller curvature facing the object side, a divergent, meniscus, second lens group having its convex surface facing the object side, the first and second lens groups defining therebetween a divergent, meniscus-shaped air chamber having its convex surface facing the object side, a convergent, meniscus, third lens group consisting of a plurality of lenses, a convergent, meniscus, fourth lens group consisting of a plurality of lenses, and a divergent, meniscus, fifth lens group having its convex surface facing the image side.
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