GB820671A - Means on photographic and cinematographic fixed focus objectives for indicating the depth of field - Google Patents
Means on photographic and cinematographic fixed focus objectives for indicating the depth of fieldInfo
- Publication number
- GB820671A GB820671A GB14005/57A GB1400557A GB820671A GB 820671 A GB820671 A GB 820671A GB 14005/57 A GB14005/57 A GB 14005/57A GB 1400557 A GB1400557 A GB 1400557A GB 820671 A GB820671 A GB 820671A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scales
- limit
- stop number
- ring
- focus
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
Abstract
820,671. Photographic cameras. SCHNEIDER, M. C. May 2, 1957 [July 14, 1956], No. 14005/57. Class 98(1) For indicating the depth of field on a fixed focus objective, an aperture setting ring carries, in addition to a stop number scale, one or more focus limit scales, a stationary lens mount having a window each for the stop number and focus limit scales. As shown, an annular extension c<SP>1</SP> of an aperture setting ring c carries stop number and distance scales; such that for a certain stop setting, the stop number g appears in a window i in a ring a<SP>3</SP>, and the new value of the limit of satisfactory focus is indicated at h through a window k whilst the far value (#) is engraved on the outside of the ring.' Additional coloured scales may be provided for use with auxiliary lenses, and if the far limit is not at infinity, a second scale (not shown) may be provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE820671X | 1956-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB820671A true GB820671A (en) | 1959-09-23 |
Family
ID=6737870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14005/57A Expired GB820671A (en) | 1956-07-14 | 1957-05-02 | Means on photographic and cinematographic fixed focus objectives for indicating the depth of field |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB820671A (en) |
-
1957
- 1957-05-02 GB GB14005/57A patent/GB820671A/en not_active Expired
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