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JPS55101921A - Mean and partial change-over photometry system of camera - Google Patents

Mean and partial change-over photometry system of camera

Info

Publication number
JPS55101921A
JPS55101921A JP990879A JP990879A JPS55101921A JP S55101921 A JPS55101921 A JP S55101921A JP 990879 A JP990879 A JP 990879A JP 990879 A JP990879 A JP 990879A JP S55101921 A JPS55101921 A JP S55101921A
Authority
JP
Japan
Prior art keywords
mean
light
photometric output
focal plate
subject
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.)
Granted
Application number
JP990879A
Other languages
Japanese (ja)
Other versions
JPS6339886B2 (en
Inventor
Shin Yamaguchi
Tokuichi Tsunekawa
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 JP990879A priority Critical patent/JPS55101921A/en
Publication of JPS55101921A publication Critical patent/JPS55101921A/en
Publication of JPS6339886B2 publication Critical patent/JPS6339886B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To enable mean photometry and luminance photometry of desired portions with one photoelectric transducer by the simple constitution of providing a light shield member which shields part of the subject image near a focal plate and inserting or detaching this.
CONSTITUTION: This comprises measuring the quantity of the light of the subject image formed on a focal plate 4 through a photographic lens 1, wherein a light shield member 6 which can go into and out from a focal plate surface is provided near the focal plate 4. The mean photometric output of the quantity of subject light is obtained by the photometric output when the light shield member 6 evacuated from the inside of the image plane and the partial photometric output of the quantity of subject light in the shielded position of the light shielding member 6 may be obtained by detecting the electrical differential output of said mean photometric output and the photometric output when the light shielding member 6 is in the desired position within the image plane.
COPYRIGHT: (C)1980,JPO&Japio
JP990879A 1979-01-31 1979-01-31 Mean and partial change-over photometry system of camera Granted JPS55101921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP990879A JPS55101921A (en) 1979-01-31 1979-01-31 Mean and partial change-over photometry system of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP990879A JPS55101921A (en) 1979-01-31 1979-01-31 Mean and partial change-over photometry system of camera

Publications (2)

Publication Number Publication Date
JPS55101921A true JPS55101921A (en) 1980-08-04
JPS6339886B2 JPS6339886B2 (en) 1988-08-08

Family

ID=11733201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP990879A Granted JPS55101921A (en) 1979-01-31 1979-01-31 Mean and partial change-over photometry system of camera

Country Status (1)

Country Link
JP (1) JPS55101921A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155521A (en) * 1981-03-20 1982-09-25 Canon Inc Photometric device of camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155521A (en) * 1981-03-20 1982-09-25 Canon Inc Photometric device of camera

Also Published As

Publication number Publication date
JPS6339886B2 (en) 1988-08-08

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