SG22487G - Aperture value control device utilizing a frequency signal from a flash unit on a camera - Google Patents

Aperture value control device utilizing a frequency signal from a flash unit on a camera

Info

Publication number
SG22487G
SG22487G SG224/87A SG22487A SG22487G SG 22487 G SG22487 G SG 22487G SG 224/87 A SG224/87 A SG 224/87A SG 22487 A SG22487 A SG 22487A SG 22487 G SG22487 G SG 22487G
Authority
SG
Singapore
Prior art keywords
camera
control device
frequency signal
aperture value
value control
Prior art date
Application number
SG224/87A
Other languages
English (en)
Original Assignee
Asahi Optical Co Ltd
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 Asahi Optical Co Ltd filed Critical Asahi Optical Co Ltd
Publication of SG22487G publication Critical patent/SG22487G/en

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
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Exposure Control For Cameras (AREA)
SG224/87A 1980-11-04 1987-03-04 Aperture value control device utilizing a frequency signal from a flash unit on a camera SG22487G (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15774380 1980-11-04

Publications (1)

Publication Number Publication Date
SG22487G true SG22487G (en) 1987-07-03

Family

ID=15656375

Family Applications (1)

Application Number Title Priority Date Filing Date
SG224/87A SG22487G (en) 1980-11-04 1987-03-04 Aperture value control device utilizing a frequency signal from a flash unit on a camera

Country Status (6)

Country Link
US (1) US4521094A (Direct)
DE (1) DE3143558C2 (Direct)
FR (1) FR2493544A1 (Direct)
GB (1) GB2090668B (Direct)
HK (1) HK42587A (Direct)
SG (1) SG22487G (Direct)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137825A (ja) * 1982-02-10 1983-08-16 Asahi Optical Co Ltd カメラにおけるフラツシユ装置からの絞り情報検出装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5087645A (Direct) * 1973-12-05 1975-07-14
DE2514192C3 (de) * 1974-04-01 1989-03-16 Canon K.K., Tokio/Tokyo Kamerasystem, bestehend aus Kamera und Blitzgerät
US4035814A (en) * 1974-09-02 1977-07-12 Asahi Kogaku Kogyo Kabushiki Kaisha Electronic flash apparatus controlled by a digital memory system
US4058816A (en) * 1974-11-26 1977-11-15 Asahi Kogaku Kogyo Kabushiki Kaisha Camera exposure control system having digitally controlled timing circuitry including a decimal count storing memory
JPS51131321A (en) * 1975-05-10 1976-11-15 Fuji Photo Optical Co Ltd Exposure control device
JPS5292719A (en) * 1976-01-30 1977-08-04 Canon Inc Photographic mode change-over system for camera
JPS5550227A (en) * 1978-10-05 1980-04-11 Canon Inc Display device of camera
US4225218A (en) * 1979-01-12 1980-09-30 Fuji Photo Optical Co., Ltd. Exposure time control circuit for camera with flash light device
DE2901149C2 (de) * 1979-01-12 1983-07-28 Fuji Photo Optical Co., Ltd., Omiya, Saitama Belichtungszeitsteuerschaltung für eine Kamera mit Blitzlichteinrichtung
US4367932A (en) * 1979-10-23 1983-01-11 Minolta Camera Kabushiki Kaisha Exposure control system

Also Published As

Publication number Publication date
FR2493544B1 (Direct) 1984-11-23
GB2090668A (en) 1982-07-14
US4521094A (en) 1985-06-04
DE3143558C2 (de) 1987-01-02
FR2493544A1 (fr) 1982-05-07
GB2090668B (en) 1984-10-31
HK42587A (en) 1987-06-05
DE3143558A1 (de) 1982-07-15

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