A high-power, four-group zoom lens is disclosed which is formed of only four
lens
groups, in order from the object side, a first lens group of positive refractive
power, a second lens group of negative refractive power, and third lens group of
negative refractive power, and a fourth lens groups of positive refractive power.
The fourth lens group includes, in order from the object side, a front lens subgroup
and a rear lens subgroup. The rear lens subgroup includes, in order from the object
side, a lens component of positive refractive power that includes a lens element,
a pair of lens elements that may form a doublet component that includes a lens
element of positive refractive power, a doublet component, and a lens component
of positive refractive power. Specified conditions are satisfied to minimize lateral
color and curvature of field.
