GB763295A - Improvements in or relating to photographic cameras - Google Patents

Improvements in or relating to photographic cameras

Info

Publication number
GB763295A
GB763295A GB2294954A GB2294954A GB763295A GB 763295 A GB763295 A GB 763295A GB 2294954 A GB2294954 A GB 2294954A GB 2294954 A GB2294954 A GB 2294954A GB 763295 A GB763295 A GB 763295A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
lever
scale
photographic cameras
focusing
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
GB2294954A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2294954A priority Critical patent/GB763295A/en
Publication of GB763295A publication Critical patent/GB763295A/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)
  • Structure And Mechanism Of Cameras (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

763,295. Photographic cameras. ROYET. P. F. Aug. 6, 1954, No. 22949/54. Class 98(1) In a twin lens camera combined with a light source, the amount of light falling on to the film is kept constant for a given shutter setting for any correctly focused position of the objective by adjustment of the diaphragm either, so that the reading on diaphragm scale 5 is the same as that on scale 8 of the focusing knob 6 or, by a coupling between the focusing means and the diaphragm adjusting means. Preferably, a cam 22 on the focusing knob shaft 21 co-operates with a lever 25 pivoted at 24 and passing through a slot in the diaphragm actuating lever 35. The tip 31 of lever 25 and the position of index 9 may be adjusted according to the film sensitivity. Specification 523,129 is referred to.
GB2294954A 1954-08-06 1954-08-06 Improvements in or relating to photographic cameras Expired GB763295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2294954A GB763295A (en) 1954-08-06 1954-08-06 Improvements in or relating to photographic cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2294954A GB763295A (en) 1954-08-06 1954-08-06 Improvements in or relating to photographic cameras

Publications (1)

Publication Number Publication Date
GB763295A true GB763295A (en) 1956-12-12

Family

ID=10187672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2294954A Expired GB763295A (en) 1954-08-06 1954-08-06 Improvements in or relating to photographic cameras

Country Status (1)

Country Link
GB (1) GB763295A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080806A (en) * 1957-10-29 1963-03-12 Studio Ges Fur Ind Und Modepho Photographic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080806A (en) * 1957-10-29 1963-03-12 Studio Ges Fur Ind Und Modepho Photographic apparatus

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