Zoom lens and image capture apparatus

An image capture apparatus comprising a zoom lens and an image sensor for converting an optical image formed by the zoom lens into an electrical signal, wherein:

• the zoom lens includes, in an order from an object side:
• a first lens group having positive refractive power;
• a second lens group having negative refractive power;
• a third lens group having positive refractive power;
• and
• a fourth lens group having positive refractive power,
• during zooming from a wide-angle end to a telephoto end, the first lens group, the third lens group, and the fourth lens group move toward an object side such that a distance between the first lens group and the second lens group increases, a distance between the second lens group and the third lens group decreases, and a distance between the third lens group and the fourth lens group decreases, and
• the zoom lens satisfies the following conditional formulae (1) and (2):
• 1.8<f3/fw<5, and (1)
• −2.5<2×D3/f2<−1.5, (2)
• where:
• f3 represents a composite focal length of the third lens group,
• fw represents a composite focal length of a total system at a wide-angle end,
• D3 represents a height from an optical axis of axial rays passing through a surface closest to the object side of the third lens group at a telephoto end, and
• f2 represents a composite focal length of the second lens group.