Patent ID: 6091901
Filing Date: 2000-07-18
Classification: G02B

Abstract:
An optical system having an image stabilizing function, comprising, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of positive refractive power, a third lens unit of positive refractive power and a fourth lens unit of negative refractive power, wherein, during movement from a wide-angle end to a telephoto end, all said lens units move along an optical axis such that the separation between said first lens unit and said second lens unit increases and the separation between said third lens unit and said fourth lens unit decreases, and wherein said second lens unit is composed of a front lens subunit of negative refractive power and a rear lens subunit of positive refractive power and said front lens subunit is so moved as to have directional components perpendicular to the optical axis, compensating for shaking of an image.