To provide a zoom lens that is small in size and light in weight and has high magnification and high optical performance.

A first lens unit L1 fixed during a variable power operation and having a positive refractive power includes, in order from the object side, a first lens sub-unit L1a having positive refractive power, a second lens sub-unit L1b having a positive refractive power, and a third lens sub-unit L1c having a negative refractive power. In adjusting a focal point, the second lens sub-unit L1b moves and the following conditions are satisfied: -4.0<f1c/f1ab<-0.8 and 0.1<f1b/f1a<3.0, wherein f1a is the focal distance of the first lens sub-unit; f1b is the focal distance of the second lens sub-unit; f1c is the focal distance of the third lens sub-unit; and f1ab is the compound focal distance of the first and second lens sub-units.