摘要 |
Provided is a zoom lens system including: in order from an object side to an image side, a first lens unit (L1) having a positive refractive power; an aperture stop (SP); and a second lens unit (L2), in which the first lens unit (L1) includes a first-a lens unit (L1a) having a positive refractive power and a first-b lens unit (L1b) having a negative refractive power which moves along an optical axis in focusing, the first-b lens unit (L1b) includes at least one negative lens and at least one positive lens (1bp), and the following conditional expression is satisfied: 0.020<¸gF1-0.6438+0.001682×vd1<0.100, where ¸gF1 denotes a partial dispersion ratio of a material of the positive lens (1bp), and vd1 denotes Abbe number of the positive lens (1bp).
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