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 middle group;
• and a final lens group that remains stationary with respect to an image plane during zooming and has a positive refractive power,
• wherein the first lens group remains stationary with respect to the image plane during zooming,
• wherein the middle group consists of, in order from the object side to the image side, a lens group that has a positive refractive power and moves by changing a spacing with an adjacent lens group during zooming, a lens group that has a negative refractive power and moves by changing a spacing with an adjacent lens group during zooming, and an image side movable lens group that has a negative refractive power and moves by changing a spacing with an adjacent lens group during zooming,
• wherein the image side movable lens group includes a positive lens and a negative lens, and
• assuming that
• a lateral magnification of the image side movable lens group at a wide angle end in a state in which an infinite distance object is in focus is βnW, and
• a lateral magnification of the image side movable lens group at a telephoto end in a state in which the infinite distance object is in focus is βnT,
• Conditional Expression (1) is satisfied, which is represented by
• 1.1<βnT/βnW (1).