JPS55144211A - Focus detector of camera - Google Patents

Focus detector of camera

Info

Publication number
JPS55144211A
JPS55144211A JP5242779A JP5242779A JPS55144211A JP S55144211 A JPS55144211 A JP S55144211A JP 5242779 A JP5242779 A JP 5242779A JP 5242779 A JP5242779 A JP 5242779A JP S55144211 A JPS55144211 A JP S55144211A
Authority
JP
Japan
Prior art keywords
open
value
lens
switch
limitless
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
JP5242779A
Other languages
Japanese (ja)
Inventor
Seiji Mura
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.)
Fujinon Corp
Original Assignee
Fuji Photo 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP5242779A priority Critical patent/JPS55144211A/en
Publication of JPS55144211A publication Critical patent/JPS55144211A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To enable limitless focus detecting operation regardless of open F value of replacement lens, by constituting the focus detector so that the photoelectric element may be changed over automatically depending on the open F value of the replacement lens to be used.
CONSTITUTION: When a lens 11B of which open F value is, for example, F2 is used, a detection lever 16 is displaced depending on the extent of protrusion L of open F value transmitting member 15, a switch 19a of a switch means 19 is held in ON state, and photoelectric elements A1, A2 are connected to a comparison operating circuit 20, so that the range finding is done only with the luminous flux from a wheel band (a). When a lens 11B OF F4 open F value is mounted, the extent of protrusion L' of open F value transmitting member 15' is larger than in the case of lens 11A, and the detection lever 16 is therefore further displaced to turn off the switch 19a, while turning on a switch 19b. As a result, photoelectric elements B1, B2 are put in operation to achieve range finding. Thus, regardless of the open F value, limitless focus detecting operation may be possible.
COPYRIGHT: (C)1980,JPO&Japio
JP5242779A 1979-04-27 1979-04-27 Focus detector of camera Pending JPS55144211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5242779A JPS55144211A (en) 1979-04-27 1979-04-27 Focus detector of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5242779A JPS55144211A (en) 1979-04-27 1979-04-27 Focus detector of camera

Publications (1)

Publication Number Publication Date
JPS55144211A true JPS55144211A (en) 1980-11-11

Family

ID=12914468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5242779A Pending JPS55144211A (en) 1979-04-27 1979-04-27 Focus detector of camera

Country Status (1)

Country Link
JP (1) JPS55144211A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204014A (en) * 1981-06-10 1982-12-14 Olympus Optical Co Ltd Switching device for focusing photodetecting element
JPS59181308A (en) * 1983-03-31 1984-10-15 Asahi Optical Co Ltd Automatic focus detecting camera
JP2008116616A (en) * 2006-11-02 2008-05-22 Nikon Corp Focus detecting device and imaging apparatus
JP2013246375A (en) * 2012-05-28 2013-12-09 Canon Inc Image capturing device and control method therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111927A (en) * 1979-02-20 1980-08-29 Ricoh Co Ltd Automatic focus detector
JPS55143404A (en) * 1979-04-12 1980-11-08 Honeywell Inc Detector used for optical device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111927A (en) * 1979-02-20 1980-08-29 Ricoh Co Ltd Automatic focus detector
JPS55143404A (en) * 1979-04-12 1980-11-08 Honeywell Inc Detector used for optical device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204014A (en) * 1981-06-10 1982-12-14 Olympus Optical Co Ltd Switching device for focusing photodetecting element
FR2512969A1 (en) * 1981-06-10 1983-03-18 Olympus Optical Co SWITCHING DEVICE FOR FOCUSED PHOTOSENSITIVE ELEMENTS FOR A CAMERA
JPH0415929B2 (en) * 1981-06-10 1992-03-19 Olympus Optical Co
JPS59181308A (en) * 1983-03-31 1984-10-15 Asahi Optical Co Ltd Automatic focus detecting camera
JP2008116616A (en) * 2006-11-02 2008-05-22 Nikon Corp Focus detecting device and imaging apparatus
JP2013246375A (en) * 2012-05-28 2013-12-09 Canon Inc Image capturing device and control method therefor

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