FR787665A - Viewfinder lens for cameras - Google Patents

Viewfinder lens for cameras

Info

Publication number
FR787665A
FR787665A FR787665DA FR787665A FR 787665 A FR787665 A FR 787665A FR 787665D A FR787665D A FR 787665DA FR 787665 A FR787665 A FR 787665A
Authority
FR
France
Prior art keywords
cameras
viewfinder lens
viewfinder
lens
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
Harry Rutledge Howser Jr
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 FR787665A publication Critical patent/FR787665A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/20—Rangefinders coupled with focusing arrangements, e.g. adjustment of rangefinder automatically focusing camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)
  • Cameras In General (AREA)
FR787665D 1934-03-15 1935-03-13 Viewfinder lens for cameras Expired FR787665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US787665XA 1934-03-15 1934-03-15

Publications (1)

Publication Number Publication Date
FR787665A true FR787665A (en) 1935-09-26

Family

ID=22146089

Family Applications (1)

Application Number Title Priority Date Filing Date
FR787665D Expired FR787665A (en) 1934-03-15 1935-03-13 Viewfinder lens for cameras

Country Status (3)

Country Link
DE (1) DE637718C (en)
FR (1) FR787665A (en)
GB (1) GB444226A (en)

Also Published As

Publication number Publication date
DE637718C (en) 1936-11-03
GB444226A (en) 1936-03-17

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