GB443342A - Improvements in photographic cameras - Google Patents
Improvements in photographic camerasInfo
- Publication number
- GB443342A GB443342A GB2232935A GB2232935A GB443342A GB 443342 A GB443342 A GB 443342A GB 2232935 A GB2232935 A GB 2232935A GB 2232935 A GB2232935 A GB 2232935A GB 443342 A GB443342 A GB 443342A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- ring
- teeth
- objective lens
- finder
- 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)
- Focusing (AREA)
- Viewfinders (AREA)
Abstract
443,342. Photographic cameras ; finders. DECKEL, F., 7, Waakirchnerstrasse, Munich, Germany. Aug. 7, 1935, No. 22329. [Class 98 (i)] The objective lens anc the view - finder lens of a photographic camera art coupled together for focus ing adjustment and the focusing gear members are associated with lenses so that each lens may be removed and a lens of different focal length sub stituted. Screw threads 6 7 on the mounts of the finder lens 3 and the ob jective lens 4 respectively engage in threaded flanges 5, 8 in the panel 2. A ring 9 mounted in a circular flange on the panel 2 has teeth 10 engaging a gear wheel 11 fixed to the mount of the finder lens. The inside of the ring 9 has two or more grooves 12 into which engage teeth 13 on a ring 14 secured to the objective lens. Grooves 15 in the ring 8 allow the teeth 13 to pass to permit withdrawal of the objective lens for substitution of another lens with similar gear members fixed thereto. Rotation of a milled ring 17 is transmitted through the wheel 11 and ring 9 to the objective lens 4. The alternative lens of longer focus has a screw thread 7 of coarser pitch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2232935A GB443342A (en) | 1935-08-07 | 1935-08-07 | Improvements in photographic cameras |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2232935A GB443342A (en) | 1935-08-07 | 1935-08-07 | Improvements in photographic cameras |
Publications (1)
Publication Number | Publication Date |
---|---|
GB443342A true GB443342A (en) | 1936-02-26 |
Family
ID=10177619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2232935A Expired GB443342A (en) | 1935-08-07 | 1935-08-07 | Improvements in photographic cameras |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB443342A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081809A (en) * | 1975-10-02 | 1978-03-28 | Fuji Photo Film Co., Ltd. | Viewfinder system for a large camera |
-
1935
- 1935-08-07 GB GB2232935A patent/GB443342A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081809A (en) * | 1975-10-02 | 1978-03-28 | Fuji Photo Film Co., Ltd. | Viewfinder system for a large camera |
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