JPS55130520A - Single-lens reflex camera provided with ttl type focus detector - Google Patents
Single-lens reflex camera provided with ttl type focus detectorInfo
- Publication number
- JPS55130520A JPS55130520A JP3868779A JP3868779A JPS55130520A JP S55130520 A JPS55130520 A JP S55130520A JP 3868779 A JP3868779 A JP 3868779A JP 3868779 A JP3868779 A JP 3868779A JP S55130520 A JPS55130520 A JP S55130520A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- mirror
- finder screen
- type focus
- lens reflex
- 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 readily give TTL type focus detection function by specifying the construction of the optical block disposed near the finder screen face.
CONSTITUTION: A photo splitting mirror 8 is formed to the inside center of a condenser lens 7 as an optical block to be disposed between a finder screen 3a and a pentagonal prism 5. A pair of photoelectric transducers 10a, 10b are parallel disposed by way of a lens 9 to the rear side face of the condenser lens 7. As a result of this, the subject light entered through an interchangeable type photographing lens 1 is reflected by the mirror 3, images on the finder screen 3a. When it is to be observed from an eyepiece 6 through a pentagonal roof prism 5, part of the subject light enters the photoelectric transducers 10a, 10b through the photo splitting mirror 8, concave face mirror 7a and lens 9 and the focus detection is accomplished from the comparison of the quantity of the received light.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3868779A JPS55130520A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3868779A JPS55130520A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55130520A true JPS55130520A (en) | 1980-10-09 |
Family
ID=12532197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3868779A Pending JPS55130520A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55130520A (en) |
-
1979
- 1979-03-31 JP JP3868779A patent/JPS55130520A/en active Pending
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