Patent ID: 6246519
Filing Date: 2001-06-12
Classification: G02B

Abstract:
A zoom lens system with vibration reduction function including, in succession from an object side:a first lens unit having positive refractive power;a second lens unit movable along a direction across an optical axis thereof and having negative refractive power;a third lens unit;a fourth lens unit having positive refractive power;a fifth lens unit having negative refractive power;during focal-length change from the wide angle end to the telephoto end, spacing between said first lens unit and said second lens unit being increased, spacing between said second lens unit and said third lens unit being varied, and spacing between said fourth lens unit and said fifth lens unit being decreased; anda vibration reduction device for moving said second lens unit in the direction across said optical axis;stabilization of an image on an image plane being accomplished by the movement of said second lens unit caused by said vibration reduction device.