Zoom lens and imaging apparatus

A zoom lens consisting of:

• in order from an object side to an image side,
• a first lens group having a negative refractive power;
• a second lens group having a positive refractive power;
• a third lens group having a positive refractive power;
• a fourth lens group having a negative refractive power;
• and
• a fifth lens group having a refractive power,
• wherein mutual distances between the first lens group, the second lens group, the third lens group, the fourth lens group and the fifth lens group change due to movement of at least the first lens group, the second lens group, the third lens group and the fourth lens group during zooming,
• the fourth lens group includes a focusing lens group which moves during focusing from an object at infinity from an object within a short range,
• a negative meniscus lens of which a convex surface faces the object side is disposed closest to an object side in the first lens group,
• a lens of which a convex surface faces the image side is disposed closest to an image side in the second lens group,
• a lens of which a concave surface faces the object side is disposed closest to an object side in the fourth lens group,
• a lens of which a concave surface faces the image side is disposed closest to an image side in the fourth lens group, and
• assuming that an on-axis air-equivalent distance from a lens surface closest to the image side to an image plane in a state in which the object at infinity at the wide-angle end is in focus is BFw, a focal length of the zoom lens in a state in which the object at infinity at the wide-angle end is in focus is fw, and a maximum half-angle of view in a state in which the object at infinity at the wide-angle end is in focus is ωw, Conditional Expression (8-7) is satisfied,
• 0.5<BFw/(fw×tan ωw)<1.3 (8-7).