Zoom lens and imaging apparatus including the same

A zoom lens comprising:

• a first lens group arranged closest to an object side, configured not to move for zooming, and having a positive refractive power;
• a lens group GR arranged closest to an image side, configured not to move for zooming, and having a positive refractive power;
• and
• a lens group GP arranged adjacent to the object side of the lens group GR, configured to move for zooming, an interval between the adjacent lens groups being changed in zooming, and having a positive refractive power,
• wherein the lens group GR consists of a subgroup GRN having a negative refractive power and a subgroup GRP having a positive refractive power, which are arranged with a longest air gap on an optical axis in the lens group GR, and
• wherein the following conditional inequalities are satisfied:
• 0.
• <
• vdGRNn
• -
• vdGRNp
• <
• 50.
• ;
• and
• 0.1
• <
• β
• ⁢
• GR
• <
• 0.7
• ,
• where νdGRNn is an average value of an Abbe number with reference to a d-line of a material of a negative lens in the subgroup GRN, νdGRNp is an average value of an Abbe number with reference to a d-line of a material of a positive lens in the subgroup GRN, and βGR is a lateral magnification of the lens group GR.