FR787665A - Viewfinder lens for cameras - Google Patents
Viewfinder lens for camerasInfo
- Publication number
- FR787665A FR787665A FR787665DA FR787665A FR 787665 A FR787665 A FR 787665A FR 787665D A FR787665D A FR 787665DA FR 787665 A FR787665 A FR 787665A
- Authority
- FR
- France
- Prior art keywords
- cameras
- viewfinder lens
- viewfinder
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/18—Focusing aids
- G03B13/20—Rangefinders coupled with focusing arrangements, e.g. adjustment of rangefinder automatically focusing camera
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Viewfinders (AREA)
- Cameras In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US787665XA | 1934-03-15 | 1934-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR787665A true FR787665A (en) | 1935-09-26 |
Family
ID=22146089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR787665D Expired FR787665A (en) | 1934-03-15 | 1935-03-13 | Viewfinder lens for cameras |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE637718C (en) |
FR (1) | FR787665A (en) |
GB (1) | GB444226A (en) |
-
1935
- 1935-03-09 GB GB7454/35A patent/GB444226A/en not_active Expired
- 1935-03-13 FR FR787665D patent/FR787665A/en not_active Expired
- 1935-03-16 DE DEH143091D patent/DE637718C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE637718C (en) | 1936-11-03 |
GB444226A (en) | 1936-03-17 |
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