Zoom lens and imaging device

A zoom lens that comprises a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a negative refractive power, and a fourth lens group having a positive refractive power, which are arranged in sequence from the object side to the image side, and that changes the magnification by changing the intervals between these lens groups, wherein

• when changing the magnification from the wide-angle end to the telescopic end, the interval between said first lens group and said second lens group is reduced,
• said first lens group includes a reflective optical element that reflects a light ray and changes its direction of travel,
• said second lens group includes at least two lenses, and the lens nearest to the image side is a single lens composed of plastic that has a positive refractive power,
• said third lens group is configured by a single negative lens composed of plastic, and
• when the focal length of the single lens positioned nearest to the image side in said second lens group is defined as f2L and the focal length of said third lens group is defined as f3, the conditional expression 0.60<|f2L/f3|<1.60 is satisfied.