| 摘要 |
A zoom lens and an imaging device using the zoom lens. In addition to having excellent optical performance, the zoom lens is compact, has large magnification, and is suitable for use in video cameras, digital still cameras, mobile telephones, etc. A zoom lens (1) is constructed by arranging, in order from the object side, a first lens group (GR1) with positive refracting power, fixed during zooming, a second lens group (GR2) with negative refracting power, a third lens group (GR3) with positive refracting power, a fourth lens group (GR4) with negative refracting power, and a fifth lens group (GR5) with positive refracting power. Zooming is performed by moving at least the second lens group and the fourth lens group. The first lens group (GR1) is constructed by arranging, in order from the object side, a first lens (G1) of a single lens with negative refracting power, a reflecting member (G2) for bending the light path by 90°, and at least one second lens (G3) with negative refracting power.
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