JPH01235929A - Multidivided photometric device - Google Patents

Multidivided photometric device

Info

Publication number
JPH01235929A
JPH01235929A JP6440888A JP6440888A JPH01235929A JP H01235929 A JPH01235929 A JP H01235929A JP 6440888 A JP6440888 A JP 6440888A JP 6440888 A JP6440888 A JP 6440888A JP H01235929 A JPH01235929 A JP H01235929A
Authority
JP
Japan
Prior art keywords
luminance
photometric
main subject
regions
exactly
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
JP6440888A
Other languages
Japanese (ja)
Inventor
Yasuteru Yamano
Takehiro Kato
Akihiko Fujiwara
Kenji Tsuji
Shuji Izumi
Masaaki Nakai
Nobuyuki Taniguchi
Original Assignee
Minolta Camera 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 Minolta Camera Co Ltd filed Critical Minolta Camera Co Ltd
Priority to JP6440888A priority Critical patent/JPH01235929A/en
Publication of JPH01235929A publication Critical patent/JPH01235929A/en
Priority claimed from US07/453,259 external-priority patent/US4977423A/en
Priority claimed from US07/567,909 external-priority patent/US5162835A/en
Priority claimed from US07/630,746 external-priority patent/US5233384A/en
Priority claimed from US07/868,089 external-priority patent/US5214465A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To exactly recognize the luminance distribution of a subject by providing plural photometric means which determine the luminance information of the photometric regions corresponding respectively to plural regions for focus detection thereby discriminating the main subject and exactly measuring the luminance thereof and the background luminance as well.
CONSTITUTION: A 1st photometric means obtains the luminance information of the region 1W3 corresponding to the position of the main subject in order to obtain the main subject luminance and the 2nd photometric means obtains the luminance information of the 2nd photometric regions 4, 5 existing around the 1st photometric regions 1W3 in order to obtain the main subject luminance or the background luminance. The 3rd photometric means obtains the luminance information of the 3rd photometric region 6 existing on the outside of the 2nd photometric regions 4, 5 in order to obtain the background luminance. The main subject luminance is thereby always exactly measured even if the position of the main subject and the ratio at which the main subject occupies on the photographing image plane change variously. In addition, the background luminance is exactly measured as well. The conditions of the luminance distribution of the subject are thus exactly recognized.
COPYRIGHT: (C)1989,JPO&Japio
JP6440888A 1988-03-16 1988-03-16 Multidivided photometric device Pending JPH01235929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6440888A JPH01235929A (en) 1988-03-16 1988-03-16 Multidivided photometric device

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP6440888A JPH01235929A (en) 1988-03-16 1988-03-16 Multidivided photometric device
US07/453,259 US4977423A (en) 1988-02-08 1989-12-20 Exposure calculating apparatus
US07/567,909 US5162835A (en) 1988-02-08 1990-08-15 Exposure calculating apparatus
US07/567,976 US5142317A (en) 1988-02-08 1990-08-15 Exposure calculating apparatus
US07/567,794 US5097281A (en) 1988-02-08 1990-08-15 Exposure calculating apparatus
US07/630,746 US5233384A (en) 1988-02-08 1990-12-20 Flash photographing system
US07/868,089 US5214465A (en) 1988-02-08 1992-04-13 Exposure calculating apparatus

Publications (1)

Publication Number Publication Date
JPH01235929A true JPH01235929A (en) 1989-09-20

Family

ID=13257451

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6440888A Pending JPH01235929A (en) 1988-03-16 1988-03-16 Multidivided photometric device

Country Status (1)

Country Link
JP (1) JPH01235929A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01293310A (en) * 1988-05-20 1989-11-27 Canon Inc Photographing device
DE4118452A1 (en) * 1990-06-05 1991-12-12 Asahi Optical Co Ltd EXPOSURE METER FOR A CAMERA
JPH07319003A (en) * 1995-05-22 1995-12-08 Canon Inc Camera
US5515133A (en) * 1990-05-07 1996-05-07 Minolta Camera Kabushiki Kaisha Flash apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01293310A (en) * 1988-05-20 1989-11-27 Canon Inc Photographing device
US5515133A (en) * 1990-05-07 1996-05-07 Minolta Camera Kabushiki Kaisha Flash apparatus
DE4118452A1 (en) * 1990-06-05 1991-12-12 Asahi Optical Co Ltd EXPOSURE METER FOR A CAMERA
DE4118452C2 (en) * 1990-06-05 1998-06-18 Asahi Optical Co Ltd Exposure meter for a camera
JPH07319003A (en) * 1995-05-22 1995-12-08 Canon Inc Camera

Similar Documents

Publication Publication Date Title
JPH02275916A (en) Automatic focusing device
JPH04307506A (en) Camera having visual line detector
JPS6318314A (en) Focus detecting device
JPS63246730A (en) Focus detector
JPH01280737A (en) Back light detecting device
JPH04348307A (en) Focus detector
JPS5385452A (en) Range finder
JPH03240030A (en) Backlight detecting device for camera
JPS6318312A (en) Focus detector
JPH0456915A (en) Object detection system of optical instrument
JPH01235929A (en) Multidivided photometric device
JPS63178222A (en) Copying exposure quantity determining device
JPH01288813A (en) Multipoint distance measuring instrument
JPS62255921A (en) Multipoint distance measuring and light measuring instrument
JPH04363648A (en) Optical member evaluation device
JPH04251230A (en) Exposure computing device of camera
JPH02126212A (en) Focus detecting device
JPS6145919A (en) Distance measuring device for vehicle
JPH01287637A (en) Multiple dividing photometric device
JPH02296107A (en) Distance measuring device
JPH04243206A (en) Area selector within photographing image plane of camera
JPH02264807A (en) Space measuring instrument
JPS62151819A (en) Distance measuring instrument
JPH03122589A (en) Apparatus for measuring particle beam
JPH0210335A (en) Finder optical system with photometry means