GB725018A - Improvements in or relating to photographic cameras - Google Patents
Improvements in or relating to photographic camerasInfo
- Publication number
- GB725018A GB725018A GB10745/53A GB1074553A GB725018A GB 725018 A GB725018 A GB 725018A GB 10745/53 A GB10745/53 A GB 10745/53A GB 1074553 A GB1074553 A GB 1074553A GB 725018 A GB725018 A GB 725018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- incisions
- objective
- viewfinder
- focused
- 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)
- Automatic Focus Adjustment (AREA)
Abstract
725,018. Viewfiriders for photographic cameras. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 20, 1953 [April 23, 1952], No. 10745/53. Class 98 (1). In a photographic camera having a focusing objective and a viewfinder comprising an optical system 1, 2, Fig. 1, a fixed frame 3, and a movable frame 4 coupled to the focusing movement of the objective as by a rod 5 so as to compensate for parallax errors of the viewfinder, the frames 3, 4 bear indices indicating the position of frame 4. Frame 3 has Y-shaped incisions 6, 7 at one edge, and frame 4 has square-cut incisions 8, 9. When the objective is focused on a near object, frame 4 is lowered to cut off the top of the field of view of the viewfinder and incisions 6, 9 coincide. When the objective is focused at infinity, incisions 7, 8 coincide. At intermediate positions incisions 8, 9 partly register with incisions 7, 6. In a modification frame 3 has a transparent distance scale in register with a slit in frame 4. An aperture in frame 4 is visible through a slot in frame 3 to indicate on scale the distance to which the objective is focused.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE725018X | 1952-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB725018A true GB725018A (en) | 1955-03-02 |
Family
ID=6634838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10745/53A Expired GB725018A (en) | 1952-04-23 | 1953-04-20 | Improvements in or relating to photographic cameras |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB725018A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2919623A (en) * | 1955-07-09 | 1960-01-05 | Voigtlaender Ag | Viewfinder for photographic cameras |
US3393601A (en) * | 1963-11-12 | 1968-07-23 | Karpf Nikolaus | Optical universal viewfinder for photographic and movie cameras with interchangeable objectives |
GB2144865A (en) * | 1983-08-10 | 1985-03-13 | Haking W Ets Ltd | Camera with turret lens and variable frame viewfinder |
-
1953
- 1953-04-20 GB GB10745/53A patent/GB725018A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2919623A (en) * | 1955-07-09 | 1960-01-05 | Voigtlaender Ag | Viewfinder for photographic cameras |
US3393601A (en) * | 1963-11-12 | 1968-07-23 | Karpf Nikolaus | Optical universal viewfinder for photographic and movie cameras with interchangeable objectives |
GB2144865A (en) * | 1983-08-10 | 1985-03-13 | Haking W Ets Ltd | Camera with turret lens and variable frame viewfinder |
US4529283A (en) * | 1983-08-10 | 1985-07-16 | W. Haking Enterprises, Limited | Camera with turret lens and variable frame viewfinder |
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