Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Takakazu Bito

Keiki Yoshitsugu

Shinji Yamaguchi

Yoshiaki Kurioka

Yasunori Tohchi

Hiroaki Suzuki

Takahiro Kitada

Yasunori Touchi

Ryosuke Sato

Yoshito Miyatake

Yoshio Matsumura

Shunichiro Yoshinaga

Takanori Yogo

Takehiro Nishioka

Mamoru Honjo

Yusuke Yonetani

Kunio Dohno

Yasunori Tochi

A zoom lens system includes at least six lens groups, each of which has power. An interval between each pair of lens groups that are adjacent to each other among the at least six lens groups changes while the zoom lens system is zooming. Each of three lens groups, which are respectively located closest, second closest, and third closest to an image plane, out of the at least six lens groups consists of one or more bonded lenses.

Zoom lens system, and image capture device and interchangeable lens unit including the zoom lens system

A zooming imaging optical system includes, in order from an object side to an image side, at least: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group. During zooming, the distance between adjacent lens groups changes. During focusing from an object at infinity to a close object, the fifth lens group moves along an optical axis toward an imaging surface side. The second lens group includes, in order from the object side to the image side, at least: a 2a-th lens group; and a 2b-th lens group having negative refractive power. Image stabilization is performed by displacing the 2b-th lens group perpendicularly to the optical axis. The optical system satisfies a predetermined conditional expression.

Zooming imaging optical system

A zoom lens system according to the disclosure, in order from an object side to an image side, includes a first lens group with positive optical power, a second lens group with negative optical power, and a subsequent lens group composed of at least three lens groups. During zooming operation, the first lens group moves along the optical axis and the second lens group does not move. The second lens group has an aperture stop. The second lens group satisfies following condition (1),&#x2212;9.0&#x2264;&#x2264;&#x2212;2.0 &#x2003;&#x2003;(1)

Zoom lens system, imaging apparatus, and camera

The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element Land Lwith positive power, lens element Lwith negative power, and lens element Lwith positive power. The lens elements Land Lare cemented. The lens element Lcorrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move. Here, condition (1) below is satisfied.0.24&#x3c;33&#x3c;3.0&#x2003;&#x2003;(1)

Zoom lens system, interchangeable lens device and camera system with zoom lens system, and imaging apparatus with zoom lens system

A zoom lens system includes a first lens group having a positive power, a second lens group that has a negative power and includes one lens element, a third lens group that has a positive power and includes at least two lens elements, and a subsequent lens group that has a positive power as a whole and includes at least two lens groups in order from an object side to an image side. In zooming operation, at least the first lens group to the third lens group move along an optical axis, and a condition of &#x2212;9.0&#x3c;fG/fG&#x3c;&#x2212;2.0 is satisfied. Where fGrepresents a focal distance of the first lens group and fGrepresents a focal distance of the second lens group.

Zoom lens system, imaging device, and camera

A zoom lens system includes a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, a fifth lens unit, and a sixth lens unit. In zooming, at least the first lens unit, the second lens unit, and the third lens unit move along an optical axis so that an interval between the first lens unit and the second lens unit at a telephoto limit becomes larger than that at a wide-angle limit, and an interval between the second lens unit and the third lens unit at the telephoto limit becomes narrower than that at the wide-angle limit. An aperture diaphragm is disposed between the second lens unit and the third lens unit. A condition of 18.5&#x3c;f/f&#x3c;30.0 (f: a focal length of the first lens unit, f: a focal length of the entire system at the wide-angle limit) is satisfied.

Zoom lens system, imaging device and camera

A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power; a fifth lens unit; and a sixth lens unit, wherein in zooming from a wide-angle limit to a telephoto limit at a time of image taking, the first lens unit, the second lens unit, the third lens unit, and the fourth lens unit move along an optical axis so that an interval between the third lens unit and the fourth lens unit at the telephoto limit is larger than that at the wide-angle limit, and wherein focusing from an infinity in-focus condition to a close-object in-focus condition is performed by moving the fourth lens unit along the optical axis.

A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and a subsequent lens unit, wherein the first to third lens units move along an optical axis in zooming, a part of the third lens unit is a third-b lens unit moving in a direction perpendicular to the optical axis, and the conditions: 1.5&#x3c;(D+D+D)/Ir&#x3c;2.4, BF/Ir&#x3c;1.45 and Z=f/f&#x3e;9.0 (D, D: optical axial thicknesses of the second and third-b lens units, D: an optical axial total thickness of the subsequent lens units, BF: a shortest optical axial distance between an apex of a most image side lens surface and an image surface, Ir=f&#xd7;tan(&#x3c9;), f, f: focal lengths of the entire system at a telephoto limit and a wide-angle limit, &#x3c9;: a half view angle at a telephoto limit) are satisfied.

A zoom lens system having a plurality of lens units, each lens unit being composed of at least one lens element, the zoom lens system, in order from an object side to an image side, comprising: a first lens unit having negative optical power and being composed of at least two lens elements; and a second lens unit having positive optical power, wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, the lens units are individually moved along an optical axis to vary magnification such that an interval between the first lens unit and the second lens unit decreases, and the conditions: f/D&#x3e;7.5 and Z=f/f&#x3e;4.0 (f: a focal length of the entire system at a wide-angle limit, f: a focal length of the entire system at a telephoto limit, D: a center thickness of a lens element located on the most object side in the first lens unit) are satisfied; an imaging device; and a camera.

A zoom lens system comprising a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, and a fifth lens unit having positive optical power, wherein the third lens unit includes at least one lens element having positive optical power and at least one lens element having negative optical power, at least the first to third lens units are moved along an optical axis in zooming so that air spaces between the respective lens units vary, thereby performing magnification change, a lens unit positioned on the image side relative to an aperture diaphragm is moved along the optical axis in focusing, and the conditions: 8.1&#x3c;f/Ir&#x3c;10.4 and Z=f/f&#x2267;9.0 (f: a composite focal length of the first lens unit, Ir=f&#xd7;tan(&#x3c9;), &#x3c9;: a half view angle at a telephoto limit, fand f: focal lengths of the entire system at a telephoto limit and at a wide-angle limit) are satisfied; an imaging device; and a camera are provided.

A zoom lens system comprises: a negative first lens unit being composed of two lens elements; a positive second lens unit; and a positive third lens unit, wherein the lens units are moved such that an interval between the first lens unit and the second lens unit decreases and an interval between the second lens unit and the third lens unit increases in zooming, so that magnification change is achieved, wherein the first lens unit is composed of a negative first lens element and a positive second lens element, and wherein the condition is satisfied: 0.50&#x3c;f/f&#x3c;1.00 where, Z=f/f&#x3e;4.0, &#x3c9;&#x3e;35, f: a focal length of the second lens element, f, f: focal lengths of the entire system at a telephoto limit, a wide-angle limit, &#x3c9;: a half view angle at a wide-angle limit.

A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit &#x3b1; which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8&#x3c;L/f&#x3c;1.2, 0.12&#x3c;D/f&#x3c;0.30 and f/f&#x3e;9.0 (L: overall length of lens system at a telephoto limit, D: axial air-equivalent length between a most image side surface of the lens unit &#x3b1; and an image surface, f: focal length of the lens unit &#x3b1;, fand f: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.

A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, the lens units are moved such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, and wherein the condition is satisfied: 2.50&#x3c;tan(&#x3c9;)&#xd7;Z&#x3c;6.00 where, Z=f/f&#x3e;4.0, &#x3c9;&#x3e;35, f, f: focal lengths of the entire system at a telephoto limit, a wide-angle limit, &#x3c9;: a half value of maximum view angle at a wide-angle limit.

A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; a fourth lens unit; and an aperture diaphragm provided between the third lens unit and the fourth lens unit, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, the third lens unit includes two or more lens elements and one or more inter-lens-element air spaces, and the conditions: &#x2212;7.0&#x3c;f/f&#x3c;&#x2212;4.0 and f/f&#x3e;9.0 (fand f: composite focal lengths of the first and second lens units, fand f: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.

A zoom lens system has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a negative first lens unit being composed of two lens elements; a positive second lens unit; and a positive third lens unit, wherein in zooming from a wide-angle limit to a telephoto limit during image taking, the individual lens units are moved along an optical axis such that an interval between the first lens unit and the second lens unit decreases and that an interval between the second lens unit and the third lens unit increases, so that magnification change is achieved, and wherein on the image side relative to the second lens unit, an aperture diaphragm is arranged that moves along the optical axis integrally with the second lens unit during zooming.

Growing community of inventors

Osaka, Japan

Takakazu Bito