Zoom lens and imaging apparatus

A zoom lens, consisting of four lens groups, composed of a first lens group having a positive refractive power and being fixed during zooming, a second lens group having a negative refractive power and being moved during zooming, a third lens group having a positive refractive power and being moved during zooming to correct an image plane variation due to the zooming, and a fourth lens group having a positive refractive power and being fixed during zooming, in order from the object side, wherein:

• a stop is disposed on the most object side in the fourth lens group;
• the second lens group and the third lens group each pass through a point where the imaging magnification of each corresponding lens group is −1× at the same time during zooming from the wide angle end to the telephoto end;
• and
• the second lens group includes at least two positive lenses and at least one negative lens, and when the d-line Abbe number and the partial dispersion ratio between the g-line and the F-line of one positive lens included in the second lens group are taken as νp and Pp respectively, the zoom lens satisfies conditional expressions (1) and (2) given below:
• 75.00<νp (1)
• 0.520<Pp<0.550 (2)
• where, νp and Pp are defined, when the refractive indices of the positive lens related to the conditional expressions (1) and (2) with respect to the g-line, the F-line, the d-line, and the C-line of the Fraunhofer lines are taken as Ng, NF, Nd, and NC respectively, as νp=(Nd−1)/(NF−NC) and Pp=(Ng−NF)/(NF−NC).