JPS55151627A - Ttl photometric device of single-lens reflex camera - Google Patents
Ttl photometric device of single-lens reflex cameraInfo
- Publication number
- JPS55151627A JPS55151627A JP5966079A JP5966079A JPS55151627A JP S55151627 A JPS55151627 A JP S55151627A JP 5966079 A JP5966079 A JP 5966079A JP 5966079 A JP5966079 A JP 5966079A JP S55151627 A JPS55151627 A JP S55151627A
- Authority
- JP
- Japan
- Prior art keywords
- light
- eyepiece
- face
- enters
- incident light
- 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.)
- Granted
Links
Abstract
PURPOSE: To generate the photometric information corresponding to an eyepiece by so constituting a pentagonal prism that the entire region light of the visual field frame enters a photometric element and so constituting the same that the reflecting face performs required light attenuation.
CONSTITUTION: If the front reflecting face C and front triangle face E of a pentagonal prism 2 are made large and small, the incident light of the entire region of a visual field frame 1 through the taking lens enters not only the eyepiece 3 but photo detector 4 as well. If a reflecting film M forming a saw-tooth-form circumferential edge on the face C, etc., the reflected light enters the element 4 by becoming less as it goes further from the incident light to the lens 4, thus the effect of the incident light upon the portion of the frame 1 is eased and corrected and the proper distribution of the quantity of light is obtained. The photometric information of a correct quantity in correspondence to the eyepiece may be obtained and the photographing of correct exposure done.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5966079A JPS55151627A (en) | 1979-05-17 | 1979-05-17 | Ttl photometric device of single-lens reflex camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5966079A JPS55151627A (en) | 1979-05-17 | 1979-05-17 | Ttl photometric device of single-lens reflex camera |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55151627A true JPS55151627A (en) | 1980-11-26 |
JPS6210414B2 JPS6210414B2 (en) | 1987-03-06 |
Family
ID=13119570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5966079A Granted JPS55151627A (en) | 1979-05-17 | 1979-05-17 | Ttl photometric device of single-lens reflex camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55151627A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63128326A (en) * | 1986-11-19 | 1988-05-31 | Canon Inc | Photometric device for camera |
-
1979
- 1979-05-17 JP JP5966079A patent/JPS55151627A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63128326A (en) * | 1986-11-19 | 1988-05-31 | Canon Inc | Photometric device for camera |
Also Published As
Publication number | Publication date |
---|---|
JPS6210414B2 (en) | 1987-03-06 |
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