JPS5617328A - Single-lens reflex camera - Google Patents
Single-lens reflex cameraInfo
- Publication number
- JPS5617328A JPS5617328A JP9390279A JP9390279A JPS5617328A JP S5617328 A JPS5617328 A JP S5617328A JP 9390279 A JP9390279 A JP 9390279A JP 9390279 A JP9390279 A JP 9390279A JP S5617328 A JPS5617328 A JP S5617328A
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflective surface
- slit
- reflected
- main body
- 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
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To improve focusing precision by composing a movable mirror of a main body that has a transmissive part, allowing part of incident light to transmit it, away from an optical axis and a reflective surface for transmission prevention on the front surface of the main body.
CONSTITUTION: Light having passed through taking lens 2 is reflected on reflective surface 4b by movable mirror 4 and, at the same time, divided into light viewed through finder 9 and light led to detector 8 via focusing mirror 5 after transmitting part of the transmissive part of main body 4a by way of slit 4c of reflective surface 4b. Part of the light passing through slit 4c of reflective surface 4b is reflected on the back surface of movable mirror 4, but it is almost reflected by reflective surface 4b on the front surface of mirror 4, so that light transmitted from the front surface will nearly be eliminated. Slit 4c and the optical axis are positioned away from each other and light when the aperture is fully opened or close to it can be photodetected. The quantity of photodetected light of photodetector 8 can be increased, so that the focusing precision can be improved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9390279A JPS5617328A (en) | 1979-07-24 | 1979-07-24 | Single-lens reflex camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9390279A JPS5617328A (en) | 1979-07-24 | 1979-07-24 | Single-lens reflex camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5617328A true JPS5617328A (en) | 1981-02-19 |
Family
ID=14095406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9390279A Pending JPS5617328A (en) | 1979-07-24 | 1979-07-24 | Single-lens reflex camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5617328A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52110033A (en) * | 1976-03-12 | 1977-09-14 | Canon Inc | Single lens reflex camera |
-
1979
- 1979-07-24 JP JP9390279A patent/JPS5617328A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52110033A (en) * | 1976-03-12 | 1977-09-14 | Canon Inc | Single lens reflex camera |
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