JPS5415733A - Lowwmagnification variableeangleelens system - Google Patents

Lowwmagnification variableeangleelens system

Info

Publication number
JPS5415733A
JPS5415733A JP6869877A JP6869877A JPS5415733A JP S5415733 A JPS5415733 A JP S5415733A JP 6869877 A JP6869877 A JP 6869877A JP 6869877 A JP6869877 A JP 6869877A JP S5415733 A JPS5415733 A JP S5415733A
Authority
JP
Japan
Prior art keywords
variableeangleelens
lowwmagnification
variableeangleelens system
lowwmagnification variableeangleelens
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.)
Granted
Application number
JP6869877A
Other languages
English (en)
Other versions
JPS5716328B2 (ja
Inventor
Riyouta Ogawa
Sadao Okudaira
Takayuki Itou
Satoru Tachihara
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
Priority to JP6869877A priority Critical patent/JPS5415733A/ja
Priority to GB23373/78A priority patent/GB1583339A/en
Priority to DE2824846A priority patent/DE2824846C3/de
Priority to US05/913,274 priority patent/US4185893A/en
Publication of JPS5415733A publication Critical patent/JPS5415733A/ja
Publication of JPS5716328B2 publication Critical patent/JPS5716328B2/ja
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
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
    • G02B15/1425—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being negative

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP6869877A 1977-06-10 1977-06-10 Lowwmagnification variableeangleelens system Granted JPS5415733A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6869877A JPS5415733A (en) 1977-06-10 1977-06-10 Lowwmagnification variableeangleelens system
GB23373/78A GB1583339A (en) 1977-06-10 1978-05-26 Photographic lens systems having variable angular fields
DE2824846A DE2824846C3 (de) 1977-06-10 1978-06-06 Varioobjektiv
US05/913,274 US4185893A (en) 1977-06-10 1978-06-07 Zoom lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6869877A JPS5415733A (en) 1977-06-10 1977-06-10 Lowwmagnification variableeangleelens system

Publications (2)

Publication Number Publication Date
JPS5415733A true JPS5415733A (en) 1979-02-05
JPS5716328B2 JPS5716328B2 (ja) 1982-04-05

Family

ID=13381236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6869877A Granted JPS5415733A (en) 1977-06-10 1977-06-10 Lowwmagnification variableeangleelens system

Country Status (4)

Country Link
US (1) US4185893A (ja)
JP (1) JPS5415733A (ja)
DE (1) DE2824846C3 (ja)
GB (1) GB1583339A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164808A (en) * 1979-06-11 1980-12-22 Sigma:Kk Large-aperture ratio wide-angle zoom lens
JPS55164805A (en) * 1979-06-08 1980-12-22 Minolta Camera Co Ltd Reverse telephoto type wide-angle lens
JPS5650311A (en) * 1979-10-02 1981-05-07 Konishiroku Photo Ind Co Ltd Wide-angle zoom lens system
JPS5858515A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS5858514A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS5858516A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS59142515A (ja) * 1983-02-02 1984-08-15 Asahi Optical Co Ltd ズ−ムレンズ
JPH0534596A (ja) * 1991-08-02 1993-02-12 Canon Inc ズームレンズ

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559550A (en) * 1978-07-06 1980-01-23 Canon Inc Zoom lens system
JPS59214631A (ja) * 1983-05-20 1984-12-04 Japan Steel Works Ltd:The 二軸押出機
JPS62170320A (ja) * 1986-01-24 1987-07-27 Toranosuke Murakami 補給用熱入ゴム製造用２軸押出機
JPS6385117A (ja) * 1986-09-26 1988-04-15 Plast Kogaku Kenkyusho:Kk ピツチ系炭素繊維の溶融紡糸機
JP2782520B2 (ja) * 1988-12-14 1998-08-06 旭光学工業株式会社 液晶投影表示装置
JPH05249373A (ja) * 1992-03-05 1993-09-28 Nikon Corp 広角ズームレンズ
JPH0921952A (ja) * 1995-07-06 1997-01-21 Minolta Co Ltd ズームレンズ
TWI294246B (en) * 2005-05-31 2008-03-01 Benq Corp Zoom lens of a projector
CN114815197B (zh) * 2022-06-29 2022-10-21 江西晶超光学有限公司 光学系统、镜头模组和电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182642A (en) * 1974-12-28 1976-07-20 Nippon Kogaku Kk Kokakuzuumurenzukei
JPS51144653A (en) * 1975-06-06 1976-12-11 Canon Inc Zoom lens system
JPS5245941A (en) * 1975-10-09 1977-04-12 Nippon Kogaku Kk <Nikon> Wide angle zoom lens system
JPS5245940A (en) * 1975-10-09 1977-04-12 Nippon Kogaku Kk <Nikon> Wide angle zoom lens system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5513334B2 (ja) * 1975-01-18 1980-04-08

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182642A (en) * 1974-12-28 1976-07-20 Nippon Kogaku Kk Kokakuzuumurenzukei
JPS51144653A (en) * 1975-06-06 1976-12-11 Canon Inc Zoom lens system
JPS5245941A (en) * 1975-10-09 1977-04-12 Nippon Kogaku Kk <Nikon> Wide angle zoom lens system
JPS5245940A (en) * 1975-10-09 1977-04-12 Nippon Kogaku Kk <Nikon> Wide angle zoom lens system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164805A (en) * 1979-06-08 1980-12-22 Minolta Camera Co Ltd Reverse telephoto type wide-angle lens
JPS6232763B2 (ja) * 1979-06-08 1987-07-16 Minolta Camera Kk
JPS55164808A (en) * 1979-06-11 1980-12-22 Sigma:Kk Large-aperture ratio wide-angle zoom lens
JPS5650311A (en) * 1979-10-02 1981-05-07 Konishiroku Photo Ind Co Ltd Wide-angle zoom lens system
JPH0115841B2 (ja) * 1979-10-02 1989-03-20 Konishiroku Photo Ind
JPS6148131B2 (ja) * 1981-10-02 1986-10-22 Asahi Optical Co Ltd
JPS6132655B2 (ja) * 1981-10-02 1986-07-28 Asahi Optical Co Ltd
JPS6136209B2 (ja) * 1981-10-02 1986-08-16 Asahi Optical Co Ltd
JPS5858516A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS5858514A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS5858515A (ja) * 1981-10-02 1983-04-07 Asahi Optical Co Ltd 非球面を用いた大口径比広角写真レンズ
JPS59142515A (ja) * 1983-02-02 1984-08-15 Asahi Optical Co Ltd ズ−ムレンズ
JPH0534596A (ja) * 1991-08-02 1993-02-12 Canon Inc ズームレンズ

Also Published As

Publication number Publication date
JPS5716328B2 (ja) 1982-04-05
DE2824846A1 (de) 1979-03-01
DE2824846C3 (de) 1980-10-30
GB1583339A (en) 1981-01-28
DE2824846B2 (de) 1980-02-21
US4185893A (en) 1980-01-29

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