| 摘要 |
<p>[Problem] To achieve a lowered cost and favorable optical performance in a zoom lens. [Solution] A zoom lens essentially consisting of, in order from the object side, a first lens group (G1) having a negative refractive power and a second lens group (G2) having a positive refractive power, the gap between the first lens group (G1) and the second lens group (G2) changing when varying magnification, wherein plastic lenses are used for all of both the first lens group (G1) and the second lens group (G2), and both groups are configured from at least two lenses (the first lens group (G1) from lenses (L11, L12) and the second lens group from lenses (L21, L22, L23)). Additionally, when the amount of motion of the second lens group (G2) when varying magnification from the wide end to the tele end is M2 and the focal distance of the entire system at the tele end is ft, the following conditional expression is satisfied: 0.45 < M2/ft < 0.8.</p> |
