| 摘要 |
The zoom lens is composed of: an object side lens group at least including, in order from an object side: a first lens group G1 having positive refractive power; and a second lens group G2 having negative refractive power; and an image focusing side lens group including, in order from the object side: a negative lens group A having negative refractive power; and a negative lens group B arranged by facing the negative lens group A across an air distance, having negative refractive power. In the zoom lens, focusing from infinity to a close object is achieved by moving just the negative lens group A toward an image focusing side to satisfy a conditional expression below:;[Expression 1];−1.80<β2t<−0.94 (1);(1−βAt2)×βBt<−4.5 (2);where “β2t” is lateral magnification at a telephoto end of the second lens group in infinity
focusing, “βAt” is lateral magnification at a telephoto end of the negative lens group A in infinity focusing, and “βBt” is lateral magnification at a telephoto end of the negative lens group B in infinity focusing. |
