JPS5794733A - Stroboscopic lamp light emission control device of t.t.l. direct photometric camera - Google Patents

Stroboscopic lamp light emission control device of t.t.l. direct photometric camera

Info

Publication number
JPS5794733A
JPS5794733A JP55171198A JP17119880A JPS5794733A JP S5794733 A JPS5794733 A JP S5794733A JP 55171198 A JP55171198 A JP 55171198A JP 17119880 A JP17119880 A JP 17119880A JP S5794733 A JPS5794733 A JP S5794733A
Authority
JP
Japan
Prior art keywords
reference voltage
stroboscopic lamp
transistor
turned
level
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
JP55171198A
Other languages
Japanese (ja)
Other versions
JPH0447292B2 (en
Inventor
Masabumi Yamazaki
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP55171198A priority Critical patent/JPS5794733A/en
Publication of JPS5794733A publication Critical patent/JPS5794733A/en
Publication of JPH0447292B2 publication Critical patent/JPH0447292B2/ja
Granted 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
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

PURPOSE:To correct an exposure error in case of the short distance photographing, by providing a reference voltage generating circuit by which reference voltage for deciding an exposure time is varied as time passes, when photographing by use of a stroboscopic lamp. CONSTITUTION:When a stroboscopic lamp is mounted and an electric powr supply is turned on, a transistor Q7 conducts, but before the mirror is raised, switches SW2, SW3 are off and an output of a NAND gage NAND 3 is in an L level, therefore, an output of an AND gate AND 1 is in an L level, and constant reference voltage VS is led as decision voltage to one input of a comparator A2 through a transistor Q5. When a switch SW3 is closed in case treveling of the shutter front screen has been completed, the outputs of the gates NAND3 and A AND1 become H level, transistors Q3, Q5 are turned off, a transistor Q4 is turned on, and voltage of a capacitor C2 which is raised up to the reference voltage VS as time passes is led to the input of the comparator A2.
JP55171198A 1980-12-03 1980-12-03 Stroboscopic lamp light emission control device of t.t.l. direct photometric camera Granted JPS5794733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171198A JPS5794733A (en) 1980-12-03 1980-12-03 Stroboscopic lamp light emission control device of t.t.l. direct photometric camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171198A JPS5794733A (en) 1980-12-03 1980-12-03 Stroboscopic lamp light emission control device of t.t.l. direct photometric camera

Publications (2)

Publication Number Publication Date
JPS5794733A true JPS5794733A (en) 1982-06-12
JPH0447292B2 JPH0447292B2 (en) 1992-08-03

Family

ID=15918826

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171198A Granted JPS5794733A (en) 1980-12-03 1980-12-03 Stroboscopic lamp light emission control device of t.t.l. direct photometric camera

Country Status (1)

Country Link
JP (1) JPS5794733A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185802U (en) * 1982-06-04 1983-12-10 日本電信電話株式会社 Tape optical fiber unit
JPS59172630A (en) * 1983-03-22 1984-09-29 Olympus Optical Co Ltd Automatic exposure controller
KR100524223B1 (en) * 1997-12-26 2005-12-29 삼성테크윈 주식회사 Device for controlling light emission of camera and control method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185802U (en) * 1982-06-04 1983-12-10 日本電信電話株式会社 Tape optical fiber unit
JPH0216323Y2 (en) * 1982-06-04 1990-05-07
JPS59172630A (en) * 1983-03-22 1984-09-29 Olympus Optical Co Ltd Automatic exposure controller
JPH0516011B2 (en) * 1983-03-22 1993-03-03 Olympus Optical Co
KR100524223B1 (en) * 1997-12-26 2005-12-29 삼성테크윈 주식회사 Device for controlling light emission of camera and control method thereof

Also Published As

Publication number Publication date
JPH0447292B2 (en) 1992-08-03

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