JPS55115027A - Lens interchange type ttl automatic exposure camera - Google Patents
Lens interchange type ttl automatic exposure cameraInfo
- Publication number
- JPS55115027A JPS55115027A JP2302579A JP2302579A JPS55115027A JP S55115027 A JPS55115027 A JP S55115027A JP 2302579 A JP2302579 A JP 2302579A JP 2302579 A JP2302579 A JP 2302579A JP S55115027 A JPS55115027 A JP S55115027A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- lens
- blade
- aperture blade
- interchangeable lens
- 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
Abstract
PURPOSE: To achieve the simplification of construction by using a program shutter and an interchangeable lens.
CONSTITUTION: The interchangeable lens 10 including the behind system shutter blade/aperture blade 7 connected to an exposure control circuit which determines exposure time and aperture diameter based on the photometric value having been stored therein and the lens-side mount and photographing lens 9 mounted to and dismounted from the body side mount 8 is disposed to the camera body 1. As a result of this, when release operation is done, the light passed through the photographing lens 9, aperture blade 7, mirror 3 and pentagonal prism 5 enters a photoelectric element 11. After it has been measured and stored, the aperture blade 7 closes and the mirror 3 rises, thence the aperture blade 7 performs exposure operation based on the photometric value having been measured. Hence, the need for full aperture value correction mechanism, aperture interlocking mechanism and aperture operation mechanism is eliminated and the aperture blade becomes unnecessary for the interchangeable lens 10 as well, thus the intended object is achieved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2302579A JPS55115027A (en) | 1979-02-28 | 1979-02-28 | Lens interchange type ttl automatic exposure camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2302579A JPS55115027A (en) | 1979-02-28 | 1979-02-28 | Lens interchange type ttl automatic exposure camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55115027A true JPS55115027A (en) | 1980-09-04 |
Family
ID=12098933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2302579A Pending JPS55115027A (en) | 1979-02-28 | 1979-02-28 | Lens interchange type ttl automatic exposure camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115027A (en) |
-
1979
- 1979-02-28 JP JP2302579A patent/JPS55115027A/en active Pending
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