Sony Corporation

Koji Toyoda

Yusuke Nanjo

Shinichi Arita

Shigehiko Matsunaga

Mitsuhiro Suzaki

Sota Miyatani

Kazuki Yonemoto

A zoom lens includes: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a positive refracting power; and a fifth lens group having a positive refracting power and configured of sub lens groups. The first, the second, the third, the fourth, and the fifth lens groups are arranged in this order from an object plane. The third lens group serves as a first compensation lens group, and one or more of the plurality of sub lens groups serves as a second compensation lens group. Each of the first compensation lens group and the second compensation lens group independently shifts in a direction perpendicular to a light axis to allow an image formed on an image plane to be shifted in the direction perpendicular to the light axis.

Zoom lens and image pickup unit

An inner focus type zoom lens includes a first lens group that has positive refracting power and is normally located at a fixed position, a second lens group that has negative refracting power and is movable in an optical axis direction for zooming, a third lens group that has positive refracting power, a fourth lens group that is movable for correction of a focal position due to the zooming and for focusing, and a fifth lens group that has positive refracting power, in order from an object side, wherein the first lens group includes a negative lens, a first positive lens, and a second positive lens arranged in order from the object side, wherein a first face of the negative lens has a shape of a concave surface turned on the object side, and wherein the zoom lens satisfies the following conditional equation (1) &#x2212;10.0&#x3c;GR/fw&#x3c;&#x2212;3.0.

Zoom lens and image capturing apparatus

A zoom lens and an image pickup apparatus are disclosed. The zoom lens includes, in order from an object side to an image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. The fifth lens group includes a fixed group having a negative refractive power, and a movable group having a positive refractive power and being movable in a direction substantially orthogonal to the optical axis. The image formed on an image surface is movable in a direction substantially orthogonal to the optical axis by moving the movable group of the fifth lens group in the direction substantially orthogonal to the optical axis. The fifth lens group is satisfied predetermined conditions.

Zoom lens and image pickup apparatus

A zoom lens includes, in order from an object side to an image side, a positive refractive, fixed first lens unit; a negative refractive second lens unit movable mainly for zooming; a positive refractive, fixed third lens unit; a positive refractive fourth lens unit movable for focal-position correction and focusing performed in response to zooming; and a positive refractive fifth lens unit. The fifth lens unit includes, in order from the object side to the image side, a negative refractive, fixed sub-unit; and a positive refractive sub-unit movable substantially perpendicularly to an optical axis. An image formed on an image surface is movable substantially perpendicularly to the optical axis by moving the movable sub-unit substantially perpendicularly to the optical axis. An aperture stop is provided on the object side of the third lens unit. The third lens unit includes a positive refractive sub-unit and a negative refractive sub-unit.

Disclosed herein is a zoom lens including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The zoom lens satisfies following conditional expressions (1) and (2),0.03&#x3c;1'/1&#x3c;0.3&#x2003;&#x2003;(1)0.3&#x3c;|2|/&#x221a;()&#x3c;0.65&#x2003;&#x2003;(2) where H&#x2032; is an interval from a vertex of a surface nearest to the image side in the first lens group to a principal point on the image side of the first lens group (&#x2212; denotes the object side, and + denotes the image side), fis focal length of the first lens group, fis focal length of the second lens group, fw is focal length of an entire lens system at a wide-angle end, and ft is the focal length of the entire lens system at a telephoto end.

Zoom lens and image pickup device

A zoom lens includes first to fifth lens groups respectively having positive, negative, positive, positive, and negative refractive powers in that order from the object side. Zooming is performed by moving the second lens group and the fourth lens group in an optical-axis direction. The first lens group includes a front lens group having a negative refractive power, an optical member for bending an optical path, and a rear lens group having a positive refractive power in that order from the object side. The front lens group is a cemented lens in which a first lens having a negative refractive power is bonded to a second lens having a positive refractive power in that order from the object side to the image side.

A zoom lens includes, in order from an object side, a first lens group having a positive refractive power and fixed in an optical axis direction, a second lens group having a negative refractive power and moving along an optical axis to zoom, a third lens group having a positive refractive power and fixed in the optical axis direction, and a fourth lens group having a positive refractive power and moving in a non straight line along the optical axis to compensate variations of an image formation position and compensate change of the image formation position caused by changes of an object distance.

Zoom lens and image capture apparatus

A zoom lens includes in order and from the side of an object, a first lens group having a positive refractive power and fixed in position, a second lens group having a negative refractive power and movable in position for providing mainly zooming, a third lens group having a positive refractive power and fixed in position, a fourth lens group having a positive refractive power and movable in position for performing a focal position correction due to the zooming and for focusing, and a fifth lens group including a single lens fixed in position. Each of the lens groups from the third lens group to the fifth lens group has at least one aspheric surface, and conditional equations (1) and (2) below are satisfied.|4/5|&#x3c;0.12&#x2003;&#x2003;(3)0.9&#x3c;&#x3b2;5&#x3c;1.2&#x2003;&#x2003;(4)where f4 is a focal length of the fourth lens group, f5 is a focal length of the fifth lens group, and &#x3b2;5 is a transverse magnification of the fifth lens group.

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Kanagawa, Japan

Koji Toyoda