FR722817A - Improvements to cinematographic and photographic devices - Google Patents

Improvements to cinematographic and photographic devices

Info

Publication number
FR722817A
FR722817A FR722817DA FR722817A FR 722817 A FR722817 A FR 722817A FR 722817D A FR722817D A FR 722817DA FR 722817 A FR722817 A FR 722817A
Authority
FR
France
Prior art keywords
cinematographic
photographic devices
photographic
devices
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
Other languages
French (fr)
Inventor
Raymond Rosier
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 filed Critical
Application granted granted Critical
Publication of FR722817A publication Critical patent/FR722817A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR722817D 1931-09-11 1931-09-11 Improvements to cinematographic and photographic devices Expired FR722817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR722817T 1931-09-11

Publications (1)

Publication Number Publication Date
FR722817A true FR722817A (en) 1932-03-26

Family

ID=9102875

Family Applications (1)

Application Number Title Priority Date Filing Date
FR722817D Expired FR722817A (en) 1931-09-11 1931-09-11 Improvements to cinematographic and photographic devices

Country Status (1)

Country Link
FR (1) FR722817A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582085A (en) * 1950-09-01 1952-01-08 Eastman Kodak Co Wide-angle lens attachment with front element of high index glass
US2784644A (en) * 1953-10-26 1957-03-12 Mcculloch Motors Corp Optical system attachment of variable focus for camera and projector objectives
US2789463A (en) * 1954-10-02 1957-04-23 Zeiss Carl Focal lens system for attaching to photographic objectives
US2800052A (en) * 1955-07-12 1957-07-23 Ednalite Optical Company Inc Combination wide angle and telephoto lens attachment
US2803167A (en) * 1954-10-02 1957-08-20 Zeiss Carl Afocal lens system attachment for photographic objectives
US2811080A (en) * 1953-06-05 1957-10-29 Schneider Co Optische Werke Adjustable and interchangeable mounting means for photographic objective systems
US2853925A (en) * 1956-12-14 1958-09-30 Eastman Kodak Co Reversible lens attachment mounting means
US2854891A (en) * 1956-10-01 1958-10-07 Eastman Kodak Co Reversible magnifying attachment for lenses
US2889745A (en) * 1958-02-10 1959-06-09 Bausch & Lomb Wide angle attachment for objective lenses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582085A (en) * 1950-09-01 1952-01-08 Eastman Kodak Co Wide-angle lens attachment with front element of high index glass
US2811080A (en) * 1953-06-05 1957-10-29 Schneider Co Optische Werke Adjustable and interchangeable mounting means for photographic objective systems
US2784644A (en) * 1953-10-26 1957-03-12 Mcculloch Motors Corp Optical system attachment of variable focus for camera and projector objectives
US2789463A (en) * 1954-10-02 1957-04-23 Zeiss Carl Focal lens system for attaching to photographic objectives
US2803167A (en) * 1954-10-02 1957-08-20 Zeiss Carl Afocal lens system attachment for photographic objectives
US2800052A (en) * 1955-07-12 1957-07-23 Ednalite Optical Company Inc Combination wide angle and telephoto lens attachment
US2854891A (en) * 1956-10-01 1958-10-07 Eastman Kodak Co Reversible magnifying attachment for lenses
US2853925A (en) * 1956-12-14 1958-09-30 Eastman Kodak Co Reversible lens attachment mounting means
US2889745A (en) * 1958-02-10 1959-06-09 Bausch & Lomb Wide angle attachment for objective lenses

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