JPS5742027A - Multiphotometric device - Google Patents

Multiphotometric device

Info

Publication number
JPS5742027A
JPS5742027A JP11892180A JP11892180A JPS5742027A JP S5742027 A JPS5742027 A JP S5742027A JP 11892180 A JP11892180 A JP 11892180A JP 11892180 A JP11892180 A JP 11892180A JP S5742027 A JPS5742027 A JP S5742027A
Authority
JP
Japan
Prior art keywords
luminance
minimum
outputs
maximum
average
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
JP11892180A
Other languages
Japanese (ja)
Inventor
Takashi Saegusa
Toru Fukuhara
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.)
NIPPON KOUGAKU KOGYO KK
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
NIPPON KOUGAKU KOGYO KK
Nippon Chemical Industrial Co Ltd
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 NIPPON KOUGAKU KOGYO KK, Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical NIPPON KOUGAKU KOGYO KK
Priority to JP11892180A priority Critical patent/JPS5742027A/en
Priority to US06/295,003 priority patent/US4412730A/en
Priority to DE19813134098 priority patent/DE3134098A1/en
Publication of JPS5742027A publication Critical patent/JPS5742027A/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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09979—Multi-zone light measuring

Abstract

PURPOSE:To eliminate the need for skill for the purpose of exposure determination by automatically judging the luminance for exposure operation according to the differences between the maximum and minimum values of multiphotometric outputs. CONSTITUTION:The multiphotometric outputs from a photometric circuit 10 are converted to luminance signals in a luminance operating part, and an maximum, average and minimum luminances are outputted from maximum value, average value and minimum value output circuits 13-15. Further, the intermediate luminance which is the average of the outputs of the circuits 14, 15 is outputted from an intermediate value output circuit 16. On the other hand, the output difference between the maximum and minimum luminances by the circuits 13, 15 is generated from a differential circuit 17, and is applied to comparators 18-21 of which the respective set values differ and of which the outputs invert to a high level when inputted with the values more than the set values. Switch circuits 22-24 are controlled by the high level outputs of these comparators 18-21, whereby the average luminance, intermediate luminance and minimum luminance are automatically judged according to the differences between the maximum and minimum luminances and are outputed, and the exposure is determined without requiring skill.
JP11892180A 1980-08-28 1980-08-28 Multiphotometric device Pending JPS5742027A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11892180A JPS5742027A (en) 1980-08-28 1980-08-28 Multiphotometric device
US06/295,003 US4412730A (en) 1980-08-28 1981-08-21 Metering device
DE19813134098 DE3134098A1 (en) 1980-08-28 1981-08-28 MEASURING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11892180A JPS5742027A (en) 1980-08-28 1980-08-28 Multiphotometric device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP62319063A Division JPS63170628A (en) 1987-12-18 1987-12-18 Multi-photometric device

Publications (1)

Publication Number Publication Date
JPS5742027A true JPS5742027A (en) 1982-03-09

Family

ID=14748474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11892180A Pending JPS5742027A (en) 1980-08-28 1980-08-28 Multiphotometric device

Country Status (1)

Country Link
JP (1) JPS5742027A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5212828A (en) * 1975-07-21 1977-01-31 Konishiroku Photo Ind Co Ltd Exposure control process for the object of a non-uniform distribution of brightness

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5212828A (en) * 1975-07-21 1977-01-31 Konishiroku Photo Ind Co Ltd Exposure control process for the object of a non-uniform distribution of brightness

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