JPS5681820A - Signal processing system of photometric operating circuit in automatic camera - Google Patents

Signal processing system of photometric operating circuit in automatic camera

Info

Publication number
JPS5681820A
JPS5681820A JP15808979A JP15808979A JPS5681820A JP S5681820 A JPS5681820 A JP S5681820A JP 15808979 A JP15808979 A JP 15808979A JP 15808979 A JP15808979 A JP 15808979A JP S5681820 A JPS5681820 A JP S5681820A
Authority
JP
Japan
Prior art keywords
counter
values
setter
information
circuit
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
JP15808979A
Other languages
Japanese (ja)
Inventor
Mikio Kobayashi
Masamichi Furukawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15808979A priority Critical patent/JPS5681820A/en
Publication of JPS5681820A publication Critical patent/JPS5681820A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To make the coincidence of input information set value and the display value of the input value to a photometric circuit easy without making accuracy enhancement of each information setting resistor by discarding the fractions bwlow the decimal point of EV values and making arithmetic operation with respect to operated input information.
CONSTITUTION: The light information from a photodiode 1, the EV signal from a manual shtter speed setter 2, the information from an aperture setter 3, and the information from an ASA sensitivity setter 4 are supplied to a selecting circuit 6 via an A/D converter 5. When the output of the setter 2 is selected, the values of ≤1EV are stored in a counter 7, and the values of ≥1EV in a counter 8. The counter 7 is reset by the reset signal RST and the content of the counter 8 is supplied to a photometric operating circuit 9, by the operated output whereof the values of ≥1EV are sent to a display device 10. when the output of the setter 4 is selected, the values of ≤1EV are stored in the ounter 7 and the values of ≥1EV in the counter 8. Next, the 1st digit of the counter 7 is reset, after which the contents of the counters 7 and 8 are sent to the circuit 9.
COPYRIGHT: (C)1981,JPO&Japio
JP15808979A 1979-12-07 1979-12-07 Signal processing system of photometric operating circuit in automatic camera Pending JPS5681820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15808979A JPS5681820A (en) 1979-12-07 1979-12-07 Signal processing system of photometric operating circuit in automatic camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15808979A JPS5681820A (en) 1979-12-07 1979-12-07 Signal processing system of photometric operating circuit in automatic camera

Publications (1)

Publication Number Publication Date
JPS5681820A true JPS5681820A (en) 1981-07-04

Family

ID=15664050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15808979A Pending JPS5681820A (en) 1979-12-07 1979-12-07 Signal processing system of photometric operating circuit in automatic camera

Country Status (1)

Country Link
JP (1) JPS5681820A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5140727A (en) * 1974-10-03 1976-04-05 Omron Tateisi Electronics Co
JPS5427427A (en) * 1977-08-02 1979-03-01 Copal Co Ltd Manual exposure circuit for digital control shutter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5140727A (en) * 1974-10-03 1976-04-05 Omron Tateisi Electronics Co
JPS5427427A (en) * 1977-08-02 1979-03-01 Copal Co Ltd Manual exposure circuit for digital control shutter

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