JPS57124330A - Single-lens reflex camera - Google Patents

Single-lens reflex camera

Info

Publication number
JPS57124330A
JPS57124330A JP958181A JP958181A JPS57124330A JP S57124330 A JPS57124330 A JP S57124330A JP 958181 A JP958181 A JP 958181A JP 958181 A JP958181 A JP 958181A JP S57124330 A JPS57124330 A JP S57124330A
Authority
JP
Japan
Prior art keywords
diaphragming
lens
circuit
drive motor
state
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
JP958181A
Other languages
Japanese (ja)
Inventor
Daiki Tsukahara
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP958181A priority Critical patent/JPS57124330A/en
Publication of JPS57124330A publication Critical patent/JPS57124330A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter

Abstract

PURPOSE:To prevent malfunction of an AF mechanism based on decreased light amount, by making a lens driving system in an AF mechanism with diaphragming operation inoperative, in a TTL automatic focus (AF) mechanism for a single-lens camera. CONSTITUTION:Light flux transmitted to a lens 1 having a diaphragm 2 is made incident to a photodetector 3, the output is operated at an operation circuit 4, and a control circuit 5 controls a focusing drive motor 8 and a focusing state display circuit 7 accordingly. On such an AF mechanism, if diaphragming is made through the operation of a diaphragm button 6', the distance measurement can be disable depending on the F value, a signal circuit 6 is provided, the drive motor is stopped immediately before diaphragming to keep the lens at the state prior to diaphragming and a diaphragming state is displayed in a display circuit, allowing to prevent misoperation and mistake of photographing.
JP958181A 1981-01-27 1981-01-27 Single-lens reflex camera Pending JPS57124330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP958181A JPS57124330A (en) 1981-01-27 1981-01-27 Single-lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP958181A JPS57124330A (en) 1981-01-27 1981-01-27 Single-lens reflex camera

Publications (1)

Publication Number Publication Date
JPS57124330A true JPS57124330A (en) 1982-08-03

Family

ID=11724268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP958181A Pending JPS57124330A (en) 1981-01-27 1981-01-27 Single-lens reflex camera

Country Status (1)

Country Link
JP (1) JPS57124330A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734730A (en) * 1985-09-17 1988-03-29 Minolta Camera Kabushiki Kaisha Automatic focus detecting camera

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5344988U (en) * 1976-09-21 1978-04-17
JPS5431733A (en) * 1977-08-15 1979-03-08 Copal Co Ltd Alarm device for incorrect exposure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5344988U (en) * 1976-09-21 1978-04-17
JPS5431733A (en) * 1977-08-15 1979-03-08 Copal Co Ltd Alarm device for incorrect exposure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734730A (en) * 1985-09-17 1988-03-29 Minolta Camera Kabushiki Kaisha Automatic focus detecting camera

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