FR1434747A - Photographic lens with variable focal length - Google Patents

Photographic lens with variable focal length

Info

Publication number
FR1434747A
FR1434747A FR18106A FR18106A FR1434747A FR 1434747 A FR1434747 A FR 1434747A FR 18106 A FR18106 A FR 18106A FR 18106 A FR18106 A FR 18106A FR 1434747 A FR1434747 A FR 1434747A
Authority
FR
France
Prior art keywords
focal length
photographic lens
variable focal
variable
photographic
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
FR18106A
Other languages
French (fr)
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.)
Carl Zeiss SMT GmbH
Original Assignee
Carl Zeiss SMT GmbH
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 Carl Zeiss SMT GmbH filed Critical Carl Zeiss SMT GmbH
Application granted granted Critical
Publication of FR1434747A publication Critical patent/FR1434747A/en
Expired 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
    • G02B15/143—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 three groups only
    • G02B15/1431—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 three groups only the first group being positive
    • G02B15/143105—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 three groups only the first group being positive arranged +-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR18106A 1964-05-29 1965-05-24 Photographic lens with variable focal length Expired FR1434747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ0010867 1964-05-29

Publications (1)

Publication Number Publication Date
FR1434747A true FR1434747A (en) 1966-04-08

Family

ID=1577786

Family Applications (1)

Application Number Title Priority Date Filing Date
FR18106A Expired FR1434747A (en) 1964-05-29 1965-05-24 Photographic lens with variable focal length

Country Status (1)

Country Link
FR (1) FR1434747A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598476A (en) * 1969-04-16 1971-08-10 Rank Organisation Ltd Zoom lens front member adjustable for focusing
US4449791A (en) * 1980-08-22 1984-05-22 Nippon Kogaku K.K. Three-group zoom lens
US4639095A (en) * 1982-05-17 1987-01-27 Canon Kabushiki Kaisha Telephoto zoom lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598476A (en) * 1969-04-16 1971-08-10 Rank Organisation Ltd Zoom lens front member adjustable for focusing
US4449791A (en) * 1980-08-22 1984-05-22 Nippon Kogaku K.K. Three-group zoom lens
US4639095A (en) * 1982-05-17 1987-01-27 Canon Kabushiki Kaisha Telephoto zoom lens

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