JPS55120020A - Focus detection and indicating device of camera - Google Patents
Focus detection and indicating device of cameraInfo
- Publication number
- JPS55120020A JPS55120020A JP2687979A JP2687979A JPS55120020A JP S55120020 A JPS55120020 A JP S55120020A JP 2687979 A JP2687979 A JP 2687979A JP 2687979 A JP2687979 A JP 2687979A JP S55120020 A JPS55120020 A JP S55120020A
- Authority
- JP
- Japan
- Prior art keywords
- focus detection
- focus
- display body
- photographic lens
- lights
- 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
- Indication In Cameras, And Counting Of Exposures (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
PURPOSE: To realize high speed and simple operation for focus adjsutment, by indicating to the photographer whether the photographic lens is moving correctly in the focusing direction, so that the photographic lens may be adjusted to exact focus by a minimum stroke of shift.
CONSTITUTION: A part of the light passing through a photographic lens 1 runs through a half-mirror 7 and a total reflection mirror 8, and is projected into a photoelectric transducer group 10 provided at a position optically equivalent to a film surface 9. The outputs corresponding to lights entering each photoelectric transducer are arithmetically processed as focus detection output ξ in a focus detection processing circuit 11, and an extreme value ξ0 is outputted when the focus is adjusted, and is displayed by a display body 25. Also, this output ξ is inputted in a focus detection circuit 12, and while the focus detection output ξ is in decreasing state, a display body 14 lights up, and while it is in increasing state, a display body 13 lights up. Therefore, the photographer has only to move the photographic lens in the lighting direction of the display body 13.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2687979A JPS55120020A (en) | 1979-03-08 | 1979-03-08 | Focus detection and indicating device of camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2687979A JPS55120020A (en) | 1979-03-08 | 1979-03-08 | Focus detection and indicating device of camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55120020A true JPS55120020A (en) | 1980-09-16 |
Family
ID=12205566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2687979A Pending JPS55120020A (en) | 1979-03-08 | 1979-03-08 | Focus detection and indicating device of camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55120020A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5768218U (en) * | 1980-10-13 | 1982-04-23 |
-
1979
- 1979-03-08 JP JP2687979A patent/JPS55120020A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5768218U (en) * | 1980-10-13 | 1982-04-23 | ||
JPH0136181Y2 (en) * | 1980-10-13 | 1989-11-02 |
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