JPS5697307A - Detection of focusing and photometry - Google Patents

Detection of focusing and photometry

Info

Publication number
JPS5697307A
JPS5697307A JP17065579A JP17065579A JPS5697307A JP S5697307 A JPS5697307 A JP S5697307A JP 17065579 A JP17065579 A JP 17065579A JP 17065579 A JP17065579 A JP 17065579A JP S5697307 A JPS5697307 A JP S5697307A
Authority
JP
Japan
Prior art keywords
exposure
input device
signal
inexpensive
photodetecting
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.)
Pending
Application number
JP17065579A
Other languages
Japanese (ja)
Inventor
Takeomi Suzuki
Asao Hayashi
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.)
Olympus Corp
Original Assignee
Olympus 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP17065579A priority Critical patent/JPS5697307A/en
Publication of JPS5697307A publication Critical patent/JPS5697307A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To make the devide inexpensive by processing photodetecting signals for focusing in a digital processing circuit and generating a focus detection signal as well as by processing a photometric signal for exposure detection in the same digital processing circuit via an analog input device and generating an exposure signal.
CONSTITUTION: A subject 1 is projected into a photodetecting device 4 via a photographic optical system 2 and a translucent mirror 3. The signals from the respective photodetectors of the photodetecting device 4 are sent via a parallel type AD converter 6 to a central controlling circuit 7, and after the arithmetic processing, a focus detection signal is outputted. On the other hand, F number, ASA value, aperture value and shutter speed value necessary for determining exposure are inputted via an analog input device 12. The light from a photodetector 13 for photometry inputs to the central controlling circuit 7 via the input device 12 and analog switch 5 then through the AD converter 6, so that an exposure determining signal is outputted. Since the analog input device 12 is an inexpensive circuit consisting of a resistance array, the device may be made inexpensive.
COPYRIGHT: (C)1981,JPO&Japio
JP17065579A 1979-12-29 1979-12-29 Detection of focusing and photometry Pending JPS5697307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17065579A JPS5697307A (en) 1979-12-29 1979-12-29 Detection of focusing and photometry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17065579A JPS5697307A (en) 1979-12-29 1979-12-29 Detection of focusing and photometry

Publications (1)

Publication Number Publication Date
JPS5697307A true JPS5697307A (en) 1981-08-06

Family

ID=15908901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17065579A Pending JPS5697307A (en) 1979-12-29 1979-12-29 Detection of focusing and photometry

Country Status (1)

Country Link
JP (1) JPS5697307A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080814A (en) * 1983-10-08 1985-05-08 Asahi Optical Co Ltd Automatic offset correcting circuit for camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080814A (en) * 1983-10-08 1985-05-08 Asahi Optical Co Ltd Automatic offset correcting circuit for camera

Similar Documents

Publication Publication Date Title
JPS53110823A (en) Optical information processor
JPS57108810A (en) Focus detector
JPS57161838A (en) Focus detector of camera
JPS5428133A (en) Optical path extension device with focus detection function
JPS5697325A (en) Focus detecting method of camera
JPS5299820A (en) Focusing glass
JPS55155331A (en) Focus detector
JPS5665121A (en) Distance measuring and photometric device of camera
JPS5697307A (en) Detection of focusing and photometry
JPS5383737A (en) Single lens reflex camera
JPS56116019A (en) Correction system for aperture control of single-lens reflex camera providing interchange of lens and interchangeable lens used for its system
JPS55106421A (en) Focusing detector
JPS5553304A (en) Focus detector
SE8703554D0 (en) DEVICE FOR DETERMINING THE CAMERA
JPS55146435A (en) Exposure display device of camera
JPS56142505A (en) Focus detecting and photometric method
JPS5543515A (en) Strobe for camera
JPS55528A (en) Focus detecting method
JPS548523A (en) Exposure controller of cameras
JPS5317728A (en) Focus detector for cine camera
JPS55143543A (en) Changeover device of partial photometry and center weighted mean photometry of camera
JPS55120020A (en) Focus detection and indicating device of camera
JPS55580A (en) Exposure time control method in single-lens reflex camera
JPS54107337A (en) Focusing device of single-lens reflex camera
JPS57120926A (en) Copying machine for microfilm