PROBLEM TO BE SOLVED: To provide a compact and light-weight high-magnification zoom lens of magnification of about 20 by reducing a diameter of a component lens group arranged on an image surface side, and reducing the size of a mechanism for camera shake correction.;SOLUTION: The high-magnification compact zoom lens includes four lens groups i.e., in order from an object side to an image surface side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, and a fourth lens group G4 having positive refractive power. When a lens position changes from a wide angle end to a telephoto end, the second lens group G2 moves to the image side, the fourth lens group G4 moves so as to compensate the variation of an image surface position, and the first lens group G1 and the third lens group G3 are fixed in an optical axis direction. When f3 is a focal length of the third lens group G3, f4 is a focal length of the fourth lens group G4, and ν4 is a mean value of the Abbe number of a convex lens in the fourth lens group G4, the high-magnification compact zoom lens satisfies (1) f3/f42.0 and (2) ν465.;COPYRIGHT: (C)2010,JPO&INPIT
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