JPS5529802A - High magnification finder of reflex camera - Google Patents
High magnification finder of reflex cameraInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-07-13 JP JP8570278A patent/JPS5529802A/en active Pending
Cited By (2)
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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