Zoom lens and imaging apparatus

A zoom lens consisting of, 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 includes, in consecutive order from a position closest to the object side to the image side, a PA lens group that has a positive refractive power and a fourth lens group that has a negative refractive power,
• during zooming, the first lens group remains stationary with respect to an image plane, 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, a spacing between the middle group and the final lens group changes, and all spacings of adjacent lens groups in the middle group change during zooming,
• the first lens group includes two uncemented positive lenses disposed adjacent to each other,
• the PA lens group includes, in consecutive order from a position closest to the object side to the image side, two biconvex lenses,
• the final lens group includes, in consecutive order from a position closest to the image side to the object side, an uncemented negative lens having a concave surface toward the image side and an uncemented biconvex lens,
• at least one focusing group that moves along an optical axis during focusing is disposed closer to the image side than a lens closest to the image side in the PA lens group,
• the at least one focusing group has a negative refractive power,
• the at least one focusing group consists of one negative lens and one positive lens, and
• a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction is disposed in the zoom lens.