GB1284693A - Camera exposure setting device - Google Patents

Camera exposure setting device

Info

Publication number
GB1284693A
GB1284693A GB358071A GB358071A GB1284693A GB 1284693 A GB1284693 A GB 1284693A GB 358071 A GB358071 A GB 358071A GB 358071 A GB358071 A GB 358071A GB 1284693 A GB1284693 A GB 1284693A
Authority
GB
United Kingdom
Prior art keywords
lamps
camera
switch
shutter speed
scene illumination
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
GB358071A
Inventor
Siegfried Schutze
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 GB358071A priority Critical patent/GB1284693A/en
Publication of GB1284693A publication Critical patent/GB1284693A/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
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

1284693 Camera exposure setting devices PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 1 Feb 1971 3580/71 Heading G2A In candescent lamps 2, 3 are visible in the view-finder 1 of a camera, the brightness of one of the lamps being adjusted according to scene illumination falling on photo-resistor 19, and the brightness of the other lamp being adjusted during setting of the camera shutter speed by a slider 11 moving over a voltage divider 12 so that upon equal brightnesses of the two lamps the correct exposure is set, wherein a resistance 6 in the power supply circuit may be short circuited by a switch 7 when the camera is set to a short shutter speed, and hence with high scene illumination, so that the luminosity of the lamps 2, 3 corresponds generally with scene illumination. In place of the resistance and switch, an additional light sensitive receiver may control the voltage fed to the control circuit 4. The switch 7 is operated by a cam 8 provided on the shaft 9 of the shutter speed setting member. In a second embodiment, the switch controls an electromagnet which when energized places filters in front of the lamps 2, 3.
GB358071A 1971-02-01 1971-02-01 Camera exposure setting device Expired GB1284693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB358071A GB1284693A (en) 1971-02-01 1971-02-01 Camera exposure setting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB358071A GB1284693A (en) 1971-02-01 1971-02-01 Camera exposure setting device

Publications (1)

Publication Number Publication Date
GB1284693A true GB1284693A (en) 1972-08-09

Family

ID=9761035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB358071A Expired GB1284693A (en) 1971-02-01 1971-02-01 Camera exposure setting device

Country Status (1)

Country Link
GB (1) GB1284693A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5494030A (en) * 1978-03-25 1979-07-25 Ricoh Co Ltd Photometric information display device for single lens reflex camra

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5494030A (en) * 1978-03-25 1979-07-25 Ricoh Co Ltd Photometric information display device for single lens reflex camra
JPS559690B2 (en) * 1978-03-25 1980-03-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee