JPS5540480A - Program shutter device - Google Patents

Program shutter device

Info

Publication number
JPS5540480A
JPS5540480A JP11398378A JP11398378A JPS5540480A JP S5540480 A JPS5540480 A JP S5540480A JP 11398378 A JP11398378 A JP 11398378A JP 11398378 A JP11398378 A JP 11398378A JP S5540480 A JPS5540480 A JP S5540480A
Authority
JP
Japan
Prior art keywords
value
exposure
address
outputted
calculating
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
JP11398378A
Other languages
Japanese (ja)
Inventor
Nobuyuki Taniguchi
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 JP11398378A priority Critical patent/JPS5540480A/en
Publication of JPS5540480A publication Critical patent/JPS5540480A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To achieve the higher speed of calculation by storing the value of exposure time TV corresponding to the preprogrammed exposure value EV, calculating TV from the digital signal of the exposure value EV obtained from said data and photometry results and calculating AV from EV and TV.
CONSTITUTION: The exposure value EV corresponding to the subject luminance is outputted in digital signals of 8 bits from the circuit 1 and the address of a permanent memory ROM 7 is assigned by the address signal based on the signal of the upper bits thereof. The value of the exposure time TV corresponding to the exposure value EV having programmed beforehand has been stored in that address and the exposure time TV is calculated in an adder 8 from the data thereof and the signal based on the lower bit of the exposure value EV. In a subtractor 9, the aperture value AV is calculated from the EV and TV value and is outputted to a display and exposure control circuit 10.
COPYRIGHT: (C)1980,JPO&Japio
JP11398378A 1978-09-16 1978-09-16 Program shutter device Pending JPS5540480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11398378A JPS5540480A (en) 1978-09-16 1978-09-16 Program shutter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11398378A JPS5540480A (en) 1978-09-16 1978-09-16 Program shutter device

Publications (1)

Publication Number Publication Date
JPS5540480A true JPS5540480A (en) 1980-03-21

Family

ID=14626109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11398378A Pending JPS5540480A (en) 1978-09-16 1978-09-16 Program shutter device

Country Status (1)

Country Link
JP (1) JPS5540480A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5427523U (en) * 1977-07-27 1979-02-22
JPS60254027A (en) * 1984-05-30 1985-12-14 Seiko Koki Kk Control circuit of program shutter
JPS6148819A (en) * 1984-08-16 1986-03-10 Seiko Koki Kk Control circuit of program shutter
FR2633734A1 (en) * 1988-06-08 1990-01-05 Asahi Optical Co Ltd
JPH03109531A (en) * 1990-08-24 1991-05-09 Seikosha Co Ltd Program shutter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516550A (en) * 1974-07-05 1976-01-20 Canon Kk ROSHUTSUSEIGYOHOHO
JPS5246815A (en) * 1975-10-09 1977-04-14 Asahi Optical Co Ltd Camera controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516550A (en) * 1974-07-05 1976-01-20 Canon Kk ROSHUTSUSEIGYOHOHO
JPS5246815A (en) * 1975-10-09 1977-04-14 Asahi Optical Co Ltd Camera controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5427523U (en) * 1977-07-27 1979-02-22
JPS569726Y2 (en) * 1977-07-27 1981-03-04
JPS60254027A (en) * 1984-05-30 1985-12-14 Seiko Koki Kk Control circuit of program shutter
JPS6148819A (en) * 1984-08-16 1986-03-10 Seiko Koki Kk Control circuit of program shutter
FR2633734A1 (en) * 1988-06-08 1990-01-05 Asahi Optical Co Ltd
US5508779A (en) * 1988-06-08 1996-04-16 Asahi Kogaku Kogyo Kabushiki Kaisha Auto-bracketing system
JPH03109531A (en) * 1990-08-24 1991-05-09 Seikosha Co Ltd Program shutter

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