JPS5552035A - Exposure control device - Google Patents

Exposure control device

Info

Publication number
JPS5552035A
JPS5552035A JP12654478A JP12654478A JPS5552035A JP S5552035 A JPS5552035 A JP S5552035A JP 12654478 A JP12654478 A JP 12654478A JP 12654478 A JP12654478 A JP 12654478A JP S5552035 A JPS5552035 A JP S5552035A
Authority
JP
Japan
Prior art keywords
photometry
mean
step difference
difference number
spot
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
JP12654478A
Other languages
Japanese (ja)
Inventor
Seiji Yamada
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Co Ltd filed Critical Minolta Co Ltd
Priority to JP12654478A priority Critical patent/JPS5552035A/en
Publication of JPS5552035A publication Critical patent/JPS5552035A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform automatic exposure control of intermediate mode by providing an arithmetic circuit of photometric values, etc. and performing the exposure controlling of not only two modes of mean photometry and spot photometry but also by giving weighting of arbitrary ratios to these two modes.
CONSTITUTION: By the first push of the shutter button, power source is supplied and photometry and display are started. When the subject positioned in the central part of the finder visual field is brighter than the surrounding parts, the output voltage level of the spot photometry becomes higher than mean photometry and the step difference number thereof is displayed as a positive value by a meter 11. IN such a case when the mean photometric value and spot photometric value coincide and the step difference number becomes 0, the same exposure is accomplished even if any of the contacts 16aW16e of a switch 16 is selected. When the step difference number such as +3 or -3 steps is indicated by the meter 11, any of the contacts 16aW16e is selected based on the intended composition. In this way, the automatic exposure controlling for the intermediate mode may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP12654478A 1978-10-13 1978-10-13 Exposure control device Pending JPS5552035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12654478A JPS5552035A (en) 1978-10-13 1978-10-13 Exposure control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12654478A JPS5552035A (en) 1978-10-13 1978-10-13 Exposure control device

Publications (1)

Publication Number Publication Date
JPS5552035A true JPS5552035A (en) 1980-04-16

Family

ID=14937803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12654478A Pending JPS5552035A (en) 1978-10-13 1978-10-13 Exposure control device

Country Status (1)

Country Link
JP (1) JPS5552035A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57122367U (en) * 1981-01-20 1982-07-30
JPS57169734A (en) * 1981-04-14 1982-10-19 Canon Inc Photometric system using focus detecting optical system
US4391500A (en) * 1980-11-25 1983-07-05 Canon Kabushiki Kaisha Camera with exposure measuring system
US4937610A (en) * 1985-09-09 1990-06-26 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5017957A (en) * 1985-09-09 1991-05-21 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5023649A (en) * 1988-04-20 1991-06-11 Minolta Camera Kabushiki Kaisha Exposure controlling apparatus of a camera having a plurality of areas for measuring brightness

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317725A (en) * 1976-08-03 1978-02-18 Minolta Camera Co Ltd Exposure meter
JPS5319027A (en) * 1976-08-04 1978-02-21 Minolta Camera Co Ltd Exposure meter
JPS5336229A (en) * 1976-09-16 1978-04-04 Asahi Optical Co Ltd Exposure measuring system for singleelens reflex camera

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317725A (en) * 1976-08-03 1978-02-18 Minolta Camera Co Ltd Exposure meter
JPS5319027A (en) * 1976-08-04 1978-02-21 Minolta Camera Co Ltd Exposure meter
JPS5336229A (en) * 1976-09-16 1978-04-04 Asahi Optical Co Ltd Exposure measuring system for singleelens reflex camera

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391500A (en) * 1980-11-25 1983-07-05 Canon Kabushiki Kaisha Camera with exposure measuring system
JPS57122367U (en) * 1981-01-20 1982-07-30
JPS57169734A (en) * 1981-04-14 1982-10-19 Canon Inc Photometric system using focus detecting optical system
JPS6250809B2 (en) * 1981-04-14 1987-10-27 Canon Kk
US4937610A (en) * 1985-09-09 1990-06-26 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5017957A (en) * 1985-09-09 1991-05-21 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5311244A (en) * 1985-09-09 1994-05-10 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5023649A (en) * 1988-04-20 1991-06-11 Minolta Camera Kabushiki Kaisha Exposure controlling apparatus of a camera having a plurality of areas for measuring brightness

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