Zoom lens having vibration prevention function

A zoom lens comprising, sequentially from an object side:

• a first lens group having a positive refractive power;
• a second lens group having a negative refractive power;
• and
• a third lens group having a positive refractive power,
• wherein when zoom is changed from a wide angle end to a telephoto end, an interval between the first lens group and the second lens group increases, and an interval between the second lens group and the third lens group decreases, and
• the second lens group comprises, sequentially from the object side, a second A lens group having a negative refractive power and a second B lens group having a negative refractive power, and the second B lens group is displaced in a direction perpendicular to an optical axis to perform a vibration prevention function,
• wherein the zoom lens satisfies the following conditions:
• 2.0<f1/fw<8.0,
• 3.0<f2b/f2<10.0,
• 0.03<|f2|/ft<0.25, and
• 0.1<f3/ft<1.0,
• wherein, f1 denotes a focal length of the first lens group, f2 denotes a focal length of the second lens group, f2b denotes a focal length of the second B lens group, fw denotes a focal length of the zoom lens at the wide angle end, f3 denotes the focal length of the third lens group, and ft denotes a focal length of the zoom lens at the telephoto end.