Zoom lens and imaging apparatus

A zoom lens comprising, in order from an object side to an image side:

• a first lens group that has a positive refractive power;
• a second lens group that has a negative refractive power;
• a middle group that includes one or more lens groups;
• and a final lens group,
• wherein the middle group has a positive refractive power as a whole throughout an entire zoom range,
• during zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the middle group changes, and a spacing between the middle group and the final lens group changes, and
• in a case where the middle group includes a plurality of lens groups, all spacings of adjacent lens groups in the middle group change during zooming,
• wherein a focal length of the zoom lens in a state where an infinite distance object is in focus at a wide angle end is fw, a focal length of the zoom lens in a state where the infinite distance object is in focus at a telephoto end is ft, and Conditional Expression (1) is satisfied, which is represented by
• 6<ft/fw<30 (1),
• wherein a back focal length of the zoom lens at an air-equivalent distance in a state where the infinite distance object is in focus at the wide angle end is Bfw, a maximum half angle of view in a state where the infinite distance object is in focus at the wide angle end is ωw, and Conditional Expression (8) is satisfied, which is represented by
• 0.5<Bfw/(fw×tan ωw)<1.1 (8),
• wherein a central thickness of a lens closest to the object side in the first lens group is d1, a focal length of the first lens group is f1, and Conditional Expression (23) is satisfied, which is represented by
• 0.01<d1/f1<0.021 (23),
• wherein the zoom lens includes a focus group that moves along an optical axis during focusing, a focal length of the focus group is ffoc, and Conditional Expression (31-1) is satisfied, which is represented by
• −0.28<ffoc/ft<−0.05 (31-1), and
• wherein a focal length of the second lens group is f2, a focal length of a lens group closest to the object side in the middle group is f3, and Conditional Expression (41) is satisfied, which is represented by
• −0.9<f2/f3<−0.54 (41), and
• wherein an Abbe number of a lens closest to the object side in the first lens group based on a d line is vd1, and Conditional Expression (2) is satisfied, which is represented by
• 29.6<vd1<50 (2), and
• wherein an Abbe number of a lens which is third from the object side in the first lens group based on a d line is vd3, and Conditional Expression (26) is satisfied, which is represented by
• 70<vd3<110 (26).