DE3711217C2 - - Google Patents

Info

Publication number
DE3711217C2
DE3711217C2 DE3711217A DE3711217A DE3711217C2 DE 3711217 C2 DE3711217 C2 DE 3711217C2 DE 3711217 A DE3711217 A DE 3711217A DE 3711217 A DE3711217 A DE 3711217A DE 3711217 C2 DE3711217 C2 DE 3711217C2
Authority
DE
Germany
Prior art keywords
lens
aspherical
approach
rear lens
approach according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE3711217A
Other languages
German (de)
English (en)
Other versions
DE3711217A1 (de
Inventor
Koichi Tokio/Tokyo Jp Maruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of DE3711217A1 publication Critical patent/DE3711217A1/de
Application granted granted Critical
Publication of DE3711217C2 publication Critical patent/DE3711217C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/10—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
DE19873711217 1986-04-04 1987-04-03 Rueckwaertiger linsensystem-ansatz Granted DE3711217A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61078999A JPS62235915A (ja) 1986-04-04 1986-04-04 リアアタツチメントレンズ

Publications (2)

Publication Number Publication Date
DE3711217A1 DE3711217A1 (de) 1987-10-15
DE3711217C2 true DE3711217C2 (en, 2012) 1992-03-26

Family

ID=13677589

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873711217 Granted DE3711217A1 (de) 1986-04-04 1987-04-03 Rueckwaertiger linsensystem-ansatz

Country Status (3)

Country Link
US (1) US4743101A (en, 2012)
JP (1) JPS62235915A (en, 2012)
DE (1) DE3711217A1 (en, 2012)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720101B (zh) * 2012-05-22 2015-07-08 昆明中铁大型养路机械集团有限公司 线路捣固稳定车及道岔稳定方法
JP6862138B2 (ja) * 2016-10-06 2021-04-21 キヤノン株式会社 コンバータレンズまたはそれを有する撮像装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834813B2 (ja) * 1976-06-01 1983-07-29 キヤノン株式会社 アタツチメントレンズ
JPS5639513A (en) * 1979-09-10 1981-04-15 Canon Inc Rear attachment lens
US4591234A (en) * 1982-01-27 1986-05-27 Nippon Kogaku K. K. Rear focus conversion lens
JPS6029719A (ja) * 1983-07-28 1985-02-15 Nippon Kogaku Kk <Nikon> 望遠レンズ用リアフォ−カスコンバ−ジョンレンズ

Also Published As

Publication number Publication date
JPS62235915A (ja) 1987-10-16
US4743101A (en) 1988-05-10
DE3711217A1 (de) 1987-10-15

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee