Title:
ZOOM LENS AND IMAGE-CAPTURING DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/137385
Kind Code:
A1
Abstract:
The present invention provides: a zoom lens that has a wide image angle, a high zoom ratio, and a short overall optical system length, and that satisfactorily corrects various aberrations; and an image capturing device provided with the same. The zoom lens has, in order starting from a body side: a first lens group G1 having a negative refractive index; a second lens group G2; an aperture diaphragm S; and a rear group RG having a positive refractive index, and the aperture diaphragm S moves in tandem with the second lens group G2 during magnification, satisfying the following conditional expression (1). (1) 15 < FLG2 / FLW < 50 wherein FLG2 is the focal distance of the second lens group G2, and FLW is the focal distance of the zoom lens 100 at the wide angle edge.
Inventors:
ZEN YUKI (JP)
NAKAGAWA KOJI (JP)
YAMADA YASUHARU (JP)
NAKAGAWA KOJI (JP)
YAMADA YASUHARU (JP)
Application Number:
PCT/JP2020/048155
Publication Date:
June 30, 2022
Filing Date:
December 23, 2020
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B13/18; G02B15/20
Domestic Patent References:
| WO2015178095A1 | 2015-11-26 | |||
| WO2018235881A1 | 2018-12-27 |
Foreign References:
| JP2019191307A | 2019-10-31 | |||
| JP2015094883A | 2015-05-18 | |||
| JP2020101750A | 2020-07-02 |
Attorney, Agent or Firm:
SAITO Keisuke (JP)
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