JPS57129420A - Focusing detector for camera - Google Patents

Focusing detector for camera

Info

Publication number
JPS57129420A
JPS57129420A JP1621981A JP1621981A JPS57129420A JP S57129420 A JPS57129420 A JP S57129420A JP 1621981 A JP1621981 A JP 1621981A JP 1621981 A JP1621981 A JP 1621981A JP S57129420 A JPS57129420 A JP S57129420A
Authority
JP
Japan
Prior art keywords
camera
focusing detector
light flux
remove dust
incident surface
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
JP1621981A
Other languages
Japanese (ja)
Inventor
Akira Hiramatsu
Masayoshi Yamamichi
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 JP1621981A priority Critical patent/JPS57129420A/en
Priority to US06/343,975 priority patent/US4456351A/en
Priority to DE19823203921 priority patent/DE3203921A1/en
Publication of JPS57129420A publication Critical patent/JPS57129420A/en
Pending legal-status Critical Current

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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To easily remove dust attached on a light flux incident surface, by providing a protection member manually operable on the front surface of photodetector, in a focusing detector of a single lens reflex camera of a TTL system. CONSTITUTION:A part of light flux passing through a photographing objective lens is made incident to a focusing detector 7 via a main mirror semitransparent section and a submirror. To protect an incident surface 8 of the said device, a protection optical member 9b is turned so that the member 9b can be projected to a lens mount side (in front of camera), by an operation lever 11 via intermediate members 10, 12, 13 having the said member 9b, allowing to remove dust easily.
JP1621981A 1981-02-05 1981-02-05 Focusing detector for camera Pending JPS57129420A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1621981A JPS57129420A (en) 1981-02-05 1981-02-05 Focusing detector for camera
US06/343,975 US4456351A (en) 1981-02-05 1982-01-29 Focus detecting device
DE19823203921 DE3203921A1 (en) 1981-02-05 1982-02-05 FOCUS MEASURING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1621981A JPS57129420A (en) 1981-02-05 1981-02-05 Focusing detector for camera

Publications (1)

Publication Number Publication Date
JPS57129420A true JPS57129420A (en) 1982-08-11

Family

ID=11910409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1621981A Pending JPS57129420A (en) 1981-02-05 1981-02-05 Focusing detector for camera

Country Status (1)

Country Link
JP (1) JPS57129420A (en)

Similar Documents

Publication Publication Date Title
GB1034365A (en) Improvements in or relating to illuminating and photographic devices
JPS57129420A (en) Focusing detector for camera
JPS57146229A (en) Optical splitter
JPS57129419A (en) Focusing detector for camera
JPS56109321A (en) Single-lens reflex camera system providing ttl photometry
JPS54107337A (en) Focusing device of single-lens reflex camera
JPS57148710A (en) Focus detector
JPS56106226A (en) Focusing detector of single lens reflex camera
JPS57132124A (en) Photometric device of single-lens reflex camera
JPS57185021A (en) Photometric device of single-lense reflex camera
JPS57130006A (en) Focus detector
JPS552232A (en) Focusing optical device for camera
JPS57122426A (en) Stroboscopic light confirming device
JPS57195236A (en) Mirror mechanism of single-lens reflex camera
JPS54107338A (en) Focusing device of single-lens reflex camera
JPS56128923A (en) Focus detector
JPS56128924A (en) Focus detector
JPH03153227A (en) Projection device
JPS54134424A (en) Automatic focusing device for single lens reflex camera
JPS5552031A (en) Focusing detector for single-lens reflex camera
JPS55108630A (en) Focus detector of camera
JPS5793328A (en) Photometric distribution switching device of camera
JPS55106428A (en) Single-lens reflex camera
JPS57186715A (en) Reader for image
JPS56106227A (en) Photometric device of reflex photometric system camera