JPS57112725A - Electronic control type lens shutter - Google Patents

Electronic control type lens shutter

Info

Publication number
JPS57112725A
JPS57112725A JP18555080A JP18555080A JPS57112725A JP S57112725 A JPS57112725 A JP S57112725A JP 18555080 A JP18555080 A JP 18555080A JP 18555080 A JP18555080 A JP 18555080A JP S57112725 A JPS57112725 A JP S57112725A
Authority
JP
Japan
Prior art keywords
sector
closing
electromagnetic magnet
ring
opening
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
JP18555080A
Other languages
Japanese (ja)
Inventor
Yoshihiro Ide
Hiroyuki Kobayashi
Minoru Arai
Kenji Togashi
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.)
MAMIYA KOUKI KK
Mamiya Camera Co Ltd
Original Assignee
MAMIYA KOUKI KK
Mamiya Camera 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 MAMIYA KOUKI KK, Mamiya Camera Co Ltd filed Critical MAMIYA KOUKI KK
Priority to JP18555080A priority Critical patent/JPS57112725A/en
Publication of JPS57112725A publication Critical patent/JPS57112725A/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
    • G03B9/58—Means for varying duration of "open" period of shutter
    • G03B9/62—Means for varying duration of "open" period of shutter by varying interval of time between end of opening movement and beginning of closing movement

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE:To lessen the time lag to make a direct photometry possible even by a lens shutter, by connecting not mechanically but electrically a sector opening member and a sector closing member directly by an electromagnetic magnet and an armature. CONSTITUTION:In the set completion state, a sector opening ring 7 and the first and the second sector closing rings 105 and 205 are rotated clockwise, and an electromagnetic magnet 21 is pressed to an armature 20. When power is supplied to the electromagnetic magnet 21 by the release operation to turn a detaining lever 14 to the right, the sector opening ring 7 is turned counterclockwise together with the sector closing ring 105, and the closing ring 205 is turned in the same direction also, and a sector 1 starts opening. When the quantity of exposure to light reaches a required value, power supply to the electromagnetic magnet 21 is cut off, and sector closing rings 105 and 205 are turned clockwise and are returned, and the sector 1 is closed to return to the original state.
JP18555080A 1980-12-29 1980-12-29 Electronic control type lens shutter Pending JPS57112725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18555080A JPS57112725A (en) 1980-12-29 1980-12-29 Electronic control type lens shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18555080A JPS57112725A (en) 1980-12-29 1980-12-29 Electronic control type lens shutter

Publications (1)

Publication Number Publication Date
JPS57112725A true JPS57112725A (en) 1982-07-13

Family

ID=16172763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18555080A Pending JPS57112725A (en) 1980-12-29 1980-12-29 Electronic control type lens shutter

Country Status (1)

Country Link
JP (1) JPS57112725A (en)

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