JP2006085155A5 - - Google Patents

Claims (9)

In order from the object side to the image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a plurality of lens units having a positive refractive power as a whole in the entire zoom range and moving during zooming. A zoom lens composed of a rear lens group,
The plurality of lens units included in the rear lens group includes a lens component having a negative refractive power that changes a distance between adjacent lens units during zooming, and the lens component having a negative refractive power has a negative refractive power. It is composed of a front lens sub-component and a rear lens sub-component having a negative refractive power, and one of the front lens sub-component and the rear lens sub-component displaces the optical axis so as to displace the image formed by the zoom lens. A zoom lens characterized by being movable so as to have a component in a vertical direction with respect to the lens.   The plurality of lens units included in the rear lens group are disposed on the object side of the negative refractive power lens component and on the image side of the negative refractive power lens component. The zoom lens according to claim 1, further comprising a lens component having a positive refractive power.   An aperture stop disposed between the second lens unit and the lens component having the negative refractive power, and the front lens sub-component is disposed on the optical axis so as to displace an image formed by the zoom lens. The zoom lens according to claim 1, wherein the zoom lens is movable so as to have a vertical component.   The zoom lens according to claim 3, wherein the rear lens sub-component is a negative lens. The focal length at the wide-angle end of the entire zoom lens system is Fw, the focal length at the telephoto end of the entire zoom lens system is Ft, Fm = √ (Fw · Ft), and the focal length of the first lens unit is F1, When the focal length of the second lens unit is F2, the focal length of the lens component having the negative refractive power is FN, and the combined focal length of the rear lens group at the zoom position of the focal length Fm is F3m,
1.2 <F1 / Fm <2.5
0.2 <| F2 / Fm | <0.4
0.4 <| FN / Fm | <1.2
0.6 <F3m / Fm <1.2
The zoom lens according to claim 1, wherein the following condition is satisfied. When βR is the product of each lens sub-component from the lens sub-component movable so as to have a component perpendicular to the optical axis to the lens unit closest to the image side and the lateral magnification at the telephoto end of each lens unit,
0.6 <βR <1.6
The zoom lens according to claim 1, wherein the following condition is satisfied. The front lens sub-component is movable so as to have a component perpendicular to the optical axis so as to displace the image formed by the zoom lens;
When the focal length at the wide-angle end of the lens component having the negative refractive power is FN and the focal length of the front lens sub-component is FBs, 0.2 <FN / FBs <0.8
The zoom lens according to claim 1, wherein the following condition is satisfied.   The zoom lens according to claim 1, wherein an image is formed on the photoelectric conversion element.   An image pickup apparatus comprising: the zoom lens according to claim 1; and a photoelectric conversion element that receives an image formed by the zoom lens.