| 摘要 |
<p>Provided is a low cost and small size zoom lens, which has excellent imaging performance while having an angle of view angle larger than 100°. The zoom lens comprises, arranged in order from an object side to an image plane side, a first lens group (G11) having a negative refractive power, a second lens group (G12) having a positive refractive power, a third lens group (G13) having a positive refractive power, and a fourth lens group (G14) having a negative refractive power. The first lens group (G11) comprises, arranged in order from the object side to the image plane side, a negative lens (L111) (a first spherical lens), a negative lens (L112) (a second spherical lens), and a positive lens (L113). A compound aspherical surface is formed on the image plane side of the negative lens (L112). Further, the zoom lens can maintain high imaging performance while achieving both small size and wider angle by satisfying a prescribed condition.</p> |
