JPS5511300A - Focusing display device of camera - Google Patents

Focusing display device of camera

Info

Publication number
JPS5511300A
JPS5511300A JP8714079A JP8714079A JPS5511300A JP S5511300 A JPS5511300 A JP S5511300A JP 8714079 A JP8714079 A JP 8714079A JP 8714079 A JP8714079 A JP 8714079A JP S5511300 A JPS5511300 A JP S5511300A
Authority
JP
Japan
Prior art keywords
focusing
depth
field
display
focusing display
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
JP8714079A
Other languages
Japanese (ja)
Inventor
Mitsuya Hosoe
Seiichi Matsumoto
Noritaka Mochizuki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP8714079A priority Critical patent/JPS5511300A/en
Publication of JPS5511300A publication Critical patent/JPS5511300A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To enhance the controllability of camera by making rational focusing display, by varying the precision of focusing display depending on the depth of field, when making focusing display by driving the display means with the output of focusing detection circuit.
CONSTITUTION: When the energy of the reflected radiation from the object is very weak, a signal from a photoelectric detection circuit D is fed into a level detection circuit C1 through amplifier A3 and integrator I3, and the input system of amplifiers A1, A2 is changed over by a switching circuit SW from the regular input system consisting of differential amplifier D1, synchronism detector K, and integrators I1, I2 to the input system consisting of constant position setting circuit C2. Thereby, when the depth of field is shallow, the focusing display precision by meter M is increased, and when the depth of field is deep, the focusing display precision by meter M is decreased. Thus, by taking the depth of field into consideration, practical and rational focusing may be performed.
COPYRIGHT: (C)1980,JPO&Japio
JP8714079A 1979-07-09 1979-07-09 Focusing display device of camera Pending JPS5511300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8714079A JPS5511300A (en) 1979-07-09 1979-07-09 Focusing display device of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8714079A JPS5511300A (en) 1979-07-09 1979-07-09 Focusing display device of camera

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP46037991 Division 1971-06-01 1971-06-01

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP10102381A Division JPS57115525A (en) 1981-06-29 1981-06-29 Focus detection device for camera

Publications (1)

Publication Number Publication Date
JPS5511300A true JPS5511300A (en) 1980-01-26

Family

ID=13906655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8714079A Pending JPS5511300A (en) 1979-07-09 1979-07-09 Focusing display device of camera

Country Status (1)

Country Link
JP (1) JPS5511300A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4791445A (en) * 1984-08-09 1988-12-13 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4827299A (en) * 1984-08-09 1989-05-02 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4958183A (en) * 1984-08-09 1990-09-18 Minolta Camera Kabushiki Kaisha Control device for use in a camera system

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