[go: up one dir, main page]

GB1078996A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1078996A
GB1078996A GB1850765A GB1850765A GB1078996A GB 1078996 A GB1078996 A GB 1078996A GB 1850765 A GB1850765 A GB 1850765A GB 1850765 A GB1850765 A GB 1850765A GB 1078996 A GB1078996 A GB 1078996A
Authority
GB
United Kingdom
Prior art keywords
lens
view
way
reflex mirror
eyepiece
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
GB1850765A
Inventor
Werner Trankner
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.)
Pentacon GmbH Foto und Feinwerktechnik
Original Assignee
Pentacon Dresden VEB
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 Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Priority to GB1850765A priority Critical patent/GB1078996A/en
Publication of GB1078996A publication Critical patent/GB1078996A/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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09978—Protection against viewer backlight or integration of the viewer light into the measured light
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09976—Through the lens [TTL] measuring in mirror-reflex cameras the sensor being mounted in, before, or behind the porro-prism

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)

Abstract

1,078,996. View-finder systems; view-finders. PENTACON DRESDEN KAMERA-UND KINOWERKE VEB. May 3, 1965, No. 18507/65. Headings G2A and G2J. In a reflex mirror view-finder system for a photographic camera having an internal photoelectric light measuring element 6, a diaphragm 10 is fixed around, or is detachable from, the eyepiece mount 9 so as to prevent extraneous light penetrating to the element 6 by way of the eyepiece lens 8, there being an airgap a between the diaphragm aperture 11 and the last lens surface 8' of the lens 8. Light reaches the lens 8 from the objective 2 by way of a reflex mirror 3, a lens 4, a beam dividing prism 5 and a roof-edged pentaprism 7.
GB1850765A 1965-05-03 1965-05-03 Photographic cameras Expired GB1078996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1850765A GB1078996A (en) 1965-05-03 1965-05-03 Photographic cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1850765A GB1078996A (en) 1965-05-03 1965-05-03 Photographic cameras

Publications (1)

Publication Number Publication Date
GB1078996A true GB1078996A (en) 1967-08-09

Family

ID=10113618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1850765A Expired GB1078996A (en) 1965-05-03 1965-05-03 Photographic cameras

Country Status (1)

Country Link
GB (1) GB1078996A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178084A (en) * 1975-06-06 1979-12-11 Canon Kabushiki Kaisha Device for measuring light incident on an image forming optical system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178084A (en) * 1975-06-06 1979-12-11 Canon Kabushiki Kaisha Device for measuring light incident on an image forming optical system

Similar Documents

Publication Publication Date Title
GB1222109A (en) Single lens reflex camera
GB1436828A (en) Single lens reflex camera
GB917985A (en) Improvements in or relating to photographic cameras having automatic exposure control means
GB1515515A (en) Device for displaying exposure parameters in the viewfinder
GB1078996A (en) Photographic cameras
GB547045A (en) Improvements in or relating to photographic view finders
GB907255A (en) Improvements in or relating to reflex cameras
GB1453406A (en) Photometric device for use in a single lens reflect camera
GB1095762A (en) Photographic cameras with viewfinders
GB1048365A (en) An exposure meter for a camera
GB1269529A (en) Improvements in and relating to viewfinder systems
GB1079218A (en) Photographic cameras with built-in exposure meters
GB959284A (en) Improvements in and relating to view finders for photographic cameras
GB1462437A (en) Photographic miniature cameras with built-in viewfinder
GB936964A (en) Photographic cameras
GB967068A (en) Improvements in or relating to combined viewfinder and focussing devices
GB1010226A (en) Improvements in or relating to photographic cameras
GB1218804A (en) Improved exposure meter arrangement for a single lens reflex camera
GB1410067A (en) Light measurement through the objective in a single lens reflex camera
FR1106716A (en) Interchangeable lens with diaphragm preselector device for monocular mirror reflex cameras
GB988879A (en) Improvements in and relating to range and view finders
GB958766A (en) Improvements in or relating to cameras having built-in exposure meters
SU723485A1 (en) Finder for reflex photographic camera
GB972697A (en) Single lens reflex photographic camera
GB1269490A (en) A motion picture camera