| 摘要 |
PROBLEM TO BE SOLVED: To provide a wide angle lens which is compact and has a long back focus. SOLUTION: The wide angle lens has a front group having a negative lens G1, a negative lens G2, and a positive lens G3 in this order from the object side; a stop; and a rear group having a negative lens G4, a positive lens G5, and a biconvex lens G6 having a large convexity directed to the object side, and the lens G2 has an aspherical surface on the image surface side, and the lens G6 has an aspherical surface as at least one surface. COPYRIGHT: (C)2005,JPO&NCIPI
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