JPS56101132A - Wide-angle finder - Google Patents

Wide-angle finder

Info

Publication number
JPS56101132A
JPS56101132A JP260080A JP260080A JPS56101132A JP S56101132 A JPS56101132 A JP S56101132A JP 260080 A JP260080 A JP 260080A JP 260080 A JP260080 A JP 260080A JP S56101132 A JPS56101132 A JP S56101132A
Authority
JP
Japan
Prior art keywords
eyepiece
view field
image frame
optical system
collimation
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
JP260080A
Other languages
Japanese (ja)
Inventor
Akio Suzuki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP260080A priority Critical patent/JPS56101132A/en
Publication of JPS56101132A publication Critical patent/JPS56101132A/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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders
    • G03B13/06—Viewfinders with lenses with or without reflectors

Abstract

PURPOSE:To prevent deterioration of the view field image, by fixing the form of the eyepiece of the optical image frame collimation system to correct the aberration of the view field optical system, in the reverse Galileo system finder of the camera or the like. CONSTITUTION:The view field optical system consists of eyepiece L4 arranged near pupil S and object lenses L1-L3 through prisms. The optical image frame collimation system forms the magnifier optical system consisting of flat convex lens L5 and eyepiece L4 through the reflection face of the prism. First, the form of eyepiece L4 is fixed which controls the aberration quantity of the optical image frame collimation system, and next, various elements of the view field optical system forming the afocal system are determined. Convex lens L1 is arranged in the object lens system having a negative refractive force as the whole for the purpose of lowering the Petzval sum, and the negative lens is divided into two lenses L2 and L3 to reduce the power load.
JP260080A 1980-01-16 1980-01-16 Wide-angle finder Pending JPS56101132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP260080A JPS56101132A (en) 1980-01-16 1980-01-16 Wide-angle finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP260080A JPS56101132A (en) 1980-01-16 1980-01-16 Wide-angle finder

Publications (1)

Publication Number Publication Date
JPS56101132A true JPS56101132A (en) 1981-08-13

Family

ID=11533871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP260080A Pending JPS56101132A (en) 1980-01-16 1980-01-16 Wide-angle finder

Country Status (1)

Country Link
JP (1) JPS56101132A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933419A (en) * 1982-08-20 1984-02-23 Olympus Optical Co Ltd Albada finder
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse galilean finder
US5630188A (en) * 1994-02-10 1997-05-13 Ricoh Company, Ltd. Lighting type bright frame finder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933419A (en) * 1982-08-20 1984-02-23 Olympus Optical Co Ltd Albada finder
JPH0428088B2 (en) * 1982-08-20 1992-05-13 Olympus Optical Co
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse galilean finder
US5630188A (en) * 1994-02-10 1997-05-13 Ricoh Company, Ltd. Lighting type bright frame finder

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