| 摘要 |
<p>The objective is to provide a zoom lens that achieves compactness in the thickness direction and satisfactorily corrects various aberrations, an imaging device using the lens, and a portable terminal. A zoom lens (10) forms an image of the subject on the imaging plane (I) of an imaging element (51), and is composed of a positive first lens group (Gr1), a negative second lens group (Gr2), a positive third lens group (Gr3), a negative fourth lens group (Gr4), and a positive fifth lens group (Gr5) in order from the object side. When there is variable magnification from the wide-angle end to the telephoto end, the first and fifth lens groups (Gr1, Gr5) are fixed, and the second lens group (Gr2) moves to the image side. This zoom lens (10) satisfies the condition equation 0.8 < f3/fW < 1.4 (1) where f3 is the focal length of the third lens group (Gr3), and fW is the focal length of the entire zoom lens (10) system at the wide-angle end.</p> |
