| 摘要 |
A miniaturized semi-wide-angle photographic lens having a field of view angle of from +/-27 DEG to +/-28 DEG is composed of five lenses grouped in four lens components. In order from the object side to the image side, the first lens is a positive lens having its surface of greater curvature toward the object, and the second lens is a double concave lens. The third lens and the fourth lens are respectively a negative lens and a positive lens, both of which constitute a cemented doublet lens. The fifth lens is a positive meniscus lens having its surface of greater curvature toward the image.
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