Zoom lens having an image stabilizing function

A zoom lens comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power, a fourth lens unit of negative refractive power, a fifth lens unit of positive refractive power and a sixth lens unit of negative refractive power, zooming being performed by varying the separations between said lens units, and said zoom lens satisfying the following condition:

• 0.3<ln Z2/ln Z<1
• where ln represents natural logarithm, Z2 is a zoom ratio of said second lens unit in zooming from a wide-angle end to a telephoto end, and Z is a zoom ratio of the entire system.

A zoom lens having an image stabilizing function, comprising at least one lens unit positioned on each of the object side and image side of a lens unit which is stationary during zooming and arranged to move axially during zooming, wherein said lens unit which is stationary during zooming is made to move in directions substantially perpendicular to an optical axis so as to correct shaking of an image.

A zoom lens having an image stabilizing function, comprising, from front to rear, a first lens unit of positive refractive power axially movable for zooming, a second lens unit of negative refractive power stationary during zooming, a rear lens unit including at least one lens unit, whose overall refractive power is positive and axially movable for zooming, wherein said second lens unit is made to move in directions substantially perpendicular to an optical axis so as to correct shaking of an image.

A zoom lens having an image stabilizing function, comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power, a fourth lens unit of positive refractive power and a fifth lens unit of negative refractive power, said second lens unit being made stationary during zooming, and zooming being performed by varying the separations between said lens units, wherein said second lens unit is made to move in directions substantially perpendicular to an optical axis so as to correct shaking of an image.

A zoom lens having an image stabilizing function, comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power, a fourth lens unit of negative refractive power, a fifth lens unit of positive refractive power and a sixth lens unit of negative refractive power, said second lens unit being stationary during zooming, and zooming being performed by varying the separations between said lens units, wherein said second lens unit is made to move in directions substantially perpendicular to an optical axis so as to correct shaking of an image.

A zoom lens having an image stabilizing function, comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power and a rear lens unit including at least one lens unit and having a positive overall refractive power, zooming from a wide-angle end to a telephoto end being performed by axially moving said first lens unit and at least one lens unit in said rear lens unit toward an object side, and the shortest focal length of the entire system being shorter than the diagonal length of an image frame, wherein said second lens unit is made to move in directions perpendicular to an optical axis so as to correct shaking of an image occurring when said zoom lens vibrates.

A zoom lens having an image stabilizing function, comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power and a fourth lens unit of positive refractive power, zooming being performed by varying the separations between said lens units, wherein said second lens unit is made to move in directions perpendicular to an optical axis so as to correct shaking of an image occurring when said zoom lens vibrates.