DE7812039U1 - Objektiv mit langer brennweite - Google Patents

Objektiv mit langer brennweite

Info

Publication number
DE7812039U1
DE7812039U1 DE7812039U DE7812039U DE7812039U1 DE 7812039 U1 DE7812039 U1 DE 7812039U1 DE 7812039 U DE7812039 U DE 7812039U DE 7812039 U DE7812039 U DE 7812039U DE 7812039 U1 DE7812039 U1 DE 7812039U1
Authority
DE
Germany
Prior art keywords
lens
focal length
positive
long focal
negative
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
Application number
DE7812039U
Other languages
German (de)
English (en)
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of DE7812039U1 publication Critical patent/DE7812039U1/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G02B23/243—Objectives for endoscopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Lenses (AREA)
DE7812039U 1977-04-25 1978-04-20 Objektiv mit langer brennweite Expired DE7812039U1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52048044A JPS5943721B2 (ja) 1977-04-25 1977-04-25 長焦点レンズ

Publications (1)

Publication Number Publication Date
DE7812039U1 true DE7812039U1 (de) 1978-09-07

Family

ID=12792312

Family Applications (1)

Application Number Title Priority Date Filing Date
DE7812039U Expired DE7812039U1 (de) 1977-04-25 1978-04-20 Objektiv mit langer brennweite

Country Status (2)

Country Link
JP (1) JPS5943721B2 (ja)
DE (1) DE7812039U1 (ja)

Also Published As

Publication number Publication date
JPS53133028A (en) 1978-11-20
JPS5943721B2 (ja) 1984-10-24

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