JPS5529802A - High magnification finder of reflex camera - Google Patents

High magnification finder of reflex camera

Info

Publication number
JPS5529802A
JPS5529802A JP8570278A JP8570278A JPS5529802A JP S5529802 A JPS5529802 A JP S5529802A JP 8570278 A JP8570278 A JP 8570278A JP 8570278 A JP8570278 A JP 8570278A JP S5529802 A JPS5529802 A JP S5529802A
Authority
JP
Japan
Prior art keywords
distance measurement
optical axis
lens
main
luminous fluxes
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
JP8570278A
Other languages
Japanese (ja)
Inventor
Takao Nakamura
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 JP8570278A priority Critical patent/JPS5529802A/en
Publication of JPS5529802A publication Critical patent/JPS5529802A/en
Pending legal-status Critical Current

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  • Viewfinders (AREA)

Abstract

PURPOSE: To eliminate distance measurement errors and enable the magnified images for distance measurement to be viewed always within the same visual field by so constructing the finder that a semi-transparent mirror is diagonally provided immediate behind the distance measuring part of the focal plate and the main optical axis luminous flux from the photographing lens is bisected to the luminous fluxes for distance measurement and is thereby utilized.
CONSTITUTION: A semi-transparent mirror 4 is diagonally provided to the central part of the optical axis of a condenser lens 3 and the main optical axis luminous flux coming from the photographing lens is bisected to luminous fluxes for distance measurement. Further, these are reflected by the first reflecting surface 10 of the small prism 9 for distance measurement disposed behind the condenser lens and the roof part 11 disposed above thereof, thence they arrive at the main eyepiece lens 7 through the eyepiece lens 12 for distance measurement. With this constitution, the luminous fluxes for distance measurement become perfectly erecting images on the upper, lower and right and left. The light distant length from the distant measuring part 2 up to the eyepiece lens 12 for distance measurement is shorter as compared to the main optical axis light distant length and the rate of magnification about 3 times that of the main axis plane is obtained. Since the magnified images for distance measurement appear at all times within the same visual field, focusing is easy.
COPYRIGHT: (C)1980,JPO&Japio
JP8570278A 1978-07-13 1978-07-13 High magnification finder of reflex camera Pending JPS5529802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8570278A JPS5529802A (en) 1978-07-13 1978-07-13 High magnification finder of reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8570278A JPS5529802A (en) 1978-07-13 1978-07-13 High magnification finder of reflex camera

Publications (1)

Publication Number Publication Date
JPS5529802A true JPS5529802A (en) 1980-03-03

Family

ID=13866146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8570278A Pending JPS5529802A (en) 1978-07-13 1978-07-13 High magnification finder of reflex camera

Country Status (1)

Country Link
JP (1) JPS5529802A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616601A (en) * 1984-06-20 1986-01-13 Canon Inc Finder optical system
JPH09236862A (en) * 1996-02-28 1997-09-09 Canon Inc In-finder display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616601A (en) * 1984-06-20 1986-01-13 Canon Inc Finder optical system
JPH09236862A (en) * 1996-02-28 1997-09-09 Canon Inc In-finder display device

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