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    ZOOM LENS AND IMAGING APPARATUS
    2.
    发明申请
    ZOOM LENS AND IMAGING APPARATUS 审中-公开

    公开(公告)号：US20190064489A1

    公开(公告)日：2019-02-28

    申请号：US16108020

    申请日：2018-08-21

    申请人： FUJIFILM Corporation

    发明人： Takuya TANAKA

    IPC分类号： G02B13/02 ,  G02B15/15 ,  G02B13/06 ,  G02B9/60

    CPC分类号： G02B13/02 ,  G02B9/60 ,  G02B13/06 ,  G02B15/155 ,  G02B15/17

    摘要： The zoom lens consists of, in order from an object side, a first lens group having a positive power, a second lens group having a positive power, a third lens group having a negative power, a fourth lens group having a negative power, and a fifth lens group having a positive power. During zooming, the first lens group and the fifth lens group remain stationary, and the other lens groups move. The following conditional expression relating to a focal length f1 of the first lens group and a focal length f3 of the third lens group is satisfied: −10

    Lens system, interchangeable lens apparatus, and camera system
    3.
    发明授权
    Lens system, interchangeable lens apparatus, and camera system 有权

    公开(公告)号：US10079964B2

    公开(公告)日：2018-09-18

    申请号：US14972150

    申请日：2015-12-17

    申请人： Panasonic Intellectual Property Management Co., Ltd.

    发明人： Yoshio Matsumura ,  Masafumi Sueyoshi ,  Yusuke Nihei

    IPC分类号： G02B15/14 ,  H04N5/225 ,  G02B13/18 ,  G02B15/17

    CPC分类号： H04N5/2254 ,  G02B13/18 ,  G02B15/17

    摘要： A lens system, an interchangeable lens apparatus, and a camera system each include a front group including a first focus lens group that moves with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition; a rear group including a second focus lens group that moves with respect to the image surface in focusing, the front group and the rear group being located in order from an object side to an image side; a fixed lens group including at least one positive power lens element, the fixed lens group being located between the front group and the rear group and fixed with respect to the image surface in focusing; and an aperture diaphragm. The positive power lens in the fixed lens group satisfies dPgF>0.015 (dPgF is an anomalous dispersibility in a g-line and an F-line of the lens element).

    REAR CONVERTER OPTICAL SYSTEM AND IMAGING APPARATUS INCLUDING THE SAME
    6.
    发明申请
    REAR CONVERTER OPTICAL SYSTEM AND IMAGING APPARATUS INCLUDING THE SAME 审中-公开

    公开(公告)号：US20180045930A1

    公开(公告)日：2018-02-15

    申请号：US15671699

    申请日：2017-08-08

    申请人： CANON KABUSHIKI KAISHA

    发明人： Satoshi Maetaki

    IPC分类号： G02B15/20 ,  G02B15/177 ,  G02B15/173

    CPC分类号： G02B15/20 ,  G02B15/08 ,  G02B15/17 ,  G02B15/173 ,  G02B15/177

    摘要： Provided is a rear converter optical system which is detachably mounted on an image side of a main lens system to increase a focal length of the main lens system, in which an effective diameter Φim of an imaging area of the main lens system, an effective diameter Φcr of a lens surface closest to the image side of the rear converter optical system, a lateral magnification βc of the rear converter optical system in the case where the rear converter optical system is mounted on the main lens system, a backfocus skc in the case where the rear converter optical system is mounted on the main lens system are appropriately set.

    Zoom lens and image pickup apparatus
    7.
    发明授权
    Zoom lens and image pickup apparatus 有权

    公开(公告)号：US09798119B2

    公开(公告)日：2017-10-24

    申请号：US15264965

    申请日：2016-09-14

    申请人： CANON KABUSHIKI KAISHA

    发明人： Tomoya Yamada

    IPC分类号： G02B15/02 ,  G02B15/10 ,  G02B5/00 ,  G02B15/17 ,  G02B27/00

    CPC分类号： G02B15/10 ,  G02B5/005 ,  G02B15/17 ,  G02B27/0025

    摘要： A zoom lens includes in order from an object side, a zoom lens unit that moves during zooming, and an aperture stop; and a relay lens unit that does not move for zooming, and the relay lens unit includes an extender lens unit changing a focal length range of the zoom lens by entering into and leaving from an optical path of the zoom lens, and that unit includes front, middle, and rear lens sub-units each including one positive lens and one negative lens. The following expressions are satisfied: 0.250

    Zoom lens and image pickup apparatus including the same
    9.
    发明授权
    Zoom lens and image pickup apparatus including the same 有权

    公开(公告)号：US09739988B2

    公开(公告)日：2017-08-22

    申请号：US14836389

    申请日：2015-08-26

    申请人： CANON KABUSHIKI KAISHA

    发明人： Masaru Sakamoto

    IPC分类号： G02B15/17 ,  G02B15/24 ,  G02B27/00 ,  H04N5/225 ,  H04N5/232

    CPC分类号： G02B15/17 ,  G02B15/24 ,  G02B27/0025 ,  H04N5/2254 ,  H04N5/23296

    摘要： A zoom lens including, in order from an object side: a positive first lens unit that does not move for zooming; a negative second lens unit that moves during the zooming; a negative third lens unit that moves along a locus convex to the object side during the zooming; an aperture stop; and a positive fourth lens unit that does not move for the zooming. The third lens unit includes a cemented lens formed by cementing a single negative lens and a single positive lens and a single negative lens. A focal length (fn1) of the single negative lens included in the cemented lens, a focal length (fp) of the single positive lens included in the cemented lens, and a lateral magnification (β3w) of the third lens unit at a wide angle end are each appropriately set.