Patent ID: 6061180
Filing Date: 2000-05-09
Classification: G02B

Abstract:
A zoom lens comprising, in order from an object side, an object-side lens group having a plurality of lens units in which separations therebetween are varied during zooming and which have a positive refractive power as a whole, an intermediate lens unit having a negative refractive power and arranged to move in directions substantially perpendicular to an optical axis so as to compensate unexpected vibrations, and a rear lens unit having a positive refractive power, wherein besides the separations between said plurality of lens units of said object-side lens group, at least a separation between said intermediate lens unit and said rear lens unit is varied to effect zooming, andwherein at least one lens unit included in said object-side lens group is moved along the optical axis to effect focusing, and a lens unit of said plurality of lens units of said object-side lens group which is closest an object has a positive refractive power.