Patent ID: 7312934

Claim:
A zoom lens comprising: a plurality of groups of lenses and varying the power thereof by changing inter-group spacings, wherein: the last group of lenses that is located at the end of an image space and is negatively refractive is held stationary in optical-axis directions during variation of the power of the zoom lens, and includes a front group of negative lenses and a rear group of positive lenses; the rear group of positive lenses or part of the rear group of positive lenses (hereinafter, referred to as a group of blur compensation lenses) is movable in directions orthogonal to the optical axis of the zoom lens; and the group of blur compensation lenses is moved in the directions orthogonal to the optical axis in order to shift an image, and wherein the condition expressed by the following formula (1) is satisfied: 0.02<(1 /CR )/ Y max<0.05 (1) where CR denotes a radius of curvature whose reciprocal is a curvature of a surface of a lens located at an object space-side end of the group of blur compensation lenses, and Ymax denotes a maximum height of an image converged on an imaging device.