JPS56135829A - Diaphragm controlling device of zoom lens - Google Patents

Diaphragm controlling device of zoom lens

Info

Publication number
JPS56135829A
JPS56135829A JP3927680A JP3927680A JPS56135829A JP S56135829 A JPS56135829 A JP S56135829A JP 3927680 A JP3927680 A JP 3927680A JP 3927680 A JP3927680 A JP 3927680A JP S56135829 A JPS56135829 A JP S56135829A
Authority
JP
Japan
Prior art keywords
diaphragm
value
signal
zoom lens
rom4
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
JP3927680A
Other languages
Japanese (ja)
Inventor
Tsuneaki Kadosawa
Tatatomi Inoue
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.)
Fujinon Corp
Original Assignee
Fuji Photo 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP3927680A priority Critical patent/JPS56135829A/en
Publication of JPS56135829A publication Critical patent/JPS56135829A/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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

PURPOSE:To make possible controlling of diaphargm aperture and achieve higher reliability, smaller size and lighter weight by using the stored values of the combinations of diaphragm apertures and focal lengths with respect to F values. CONSTITUTION:The rotating amount of a cam barrel 2 which determines the focal length of a zoom lens body 1 converted to a signal by a potentiometer P1, and this signal is the address input to an ROM4 via an A/D converter 3. The combinations of diaphragm apertures and focal lengths to obtain the minimum F value of the body 1 have been stored in the ROM4. The diaphragm aperture information is read out from the same by the focal length information and is analogically multiplied 6 by the signal corresponding to the F value having been manually set with a pontentiometer P2. The multiplied value is inputted to a servo amplifier 7, the output thereof is supplied to a diaphragm blade driving motor M. Hence, diaphragm blade 8 are effectively stopped down, and the desired F value is obtained.
JP3927680A 1980-03-27 1980-03-27 Diaphragm controlling device of zoom lens Pending JPS56135829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3927680A JPS56135829A (en) 1980-03-27 1980-03-27 Diaphragm controlling device of zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3927680A JPS56135829A (en) 1980-03-27 1980-03-27 Diaphragm controlling device of zoom lens

Publications (1)

Publication Number Publication Date
JPS56135829A true JPS56135829A (en) 1981-10-23

Family

ID=12548636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3927680A Pending JPS56135829A (en) 1980-03-27 1980-03-27 Diaphragm controlling device of zoom lens

Country Status (1)

Country Link
JP (1) JPS56135829A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540262A (en) * 1982-03-05 1985-09-10 Minolta Camera Camera accessory with data producer
US4560267A (en) * 1982-03-26 1985-12-24 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
US4673275A (en) * 1982-03-26 1987-06-16 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
JPS6340111A (en) * 1986-08-05 1988-02-20 Sony Corp Auto zoom device for camera
US4912498A (en) * 1982-03-26 1990-03-27 Minolta Camera Kabushiki Kaisha Camera system capable of interchanging its objective lens
US5311245A (en) * 1982-03-26 1994-05-10 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
JP2015052737A (en) * 2013-09-09 2015-03-19 オリンパス株式会社 Optical device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393021A (en) * 1977-01-25 1978-08-15 Minolta Camera Co Ltd Aperture control device in variable power lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393021A (en) * 1977-01-25 1978-08-15 Minolta Camera Co Ltd Aperture control device in variable power lens

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540262A (en) * 1982-03-05 1985-09-10 Minolta Camera Camera accessory with data producer
US4560267A (en) * 1982-03-26 1985-12-24 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
US4673275A (en) * 1982-03-26 1987-06-16 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
US4803509A (en) * 1982-03-26 1989-02-07 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
US4912498A (en) * 1982-03-26 1990-03-27 Minolta Camera Kabushiki Kaisha Camera system capable of interchanging its objective lens
US4970541A (en) * 1982-03-26 1990-11-13 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
US4974000A (en) * 1982-03-26 1990-11-27 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory
US5311245A (en) * 1982-03-26 1994-05-10 Minolta Camera Kabushiki Kaisha Camera system operable by carrying data from a camera accessory to a camera body
JPS6340111A (en) * 1986-08-05 1988-02-20 Sony Corp Auto zoom device for camera
JP2015052737A (en) * 2013-09-09 2015-03-19 オリンパス株式会社 Optical device

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