GB906362A - Improvements in and relating to a diaphragm for a photographic camera - Google Patents
Improvements in and relating to a diaphragm for a photographic cameraInfo
- Publication number
- GB906362A GB906362A GB1668961A GB1668961A GB906362A GB 906362 A GB906362 A GB 906362A GB 1668961 A GB1668961 A GB 1668961A GB 1668961 A GB1668961 A GB 1668961A GB 906362 A GB906362 A GB 906362A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- leaves
- aperture
- maximum
- exposure
- 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/12—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device a hand-actuated member moved from one position to another providing the energy to move the setting member, e.g. depression of shutter release button causes a stepped feeler to co-operate with the pointer of the light-sensitive device to set the diaphragm and thereafter release the shutter
-
- 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Diaphragms For Cameras (AREA)
Abstract
906,362. Photo-electric exposure control. AGFA A.G. May 8, 1961 [May 11, 1960], No. 16689/61. Class 40 (3). [Also in Group XX] A diaphragm for a photographic camera includes two relatively movable leaves having congruent cut-out areas, the arrangement being such that the maximum diaphragm aperture is set when the said areas are in maximum register, movement of the leaves in the same relative direction increasing the aperture to the maximum and reducing it again and movement in the opposite direction achieving the same effective result, thus providing for two different aperture ranges, one on each side of the maximum aperture, and the diaphragm being adapted for operation by two independent means, each arranged for reciprocal relative movement of the leaves in a different one of the said two ranges, one of said means being an automatic exposure regulating means and the other of said means being a manual setting means, a semi-automatic exposure regulating means or an automatic exposure regulating means, the latter corresponding to a different exposure programme from the other said automatic exposure regulating means. As shown, diaphragm leaves 6, 7 are both pivoted at 8 and have exposure aperture defining areas 9, 10 respectively cut-out therefrom. For automatic setting of the diaphragm, manual setting means 16 is positioned at the end of a slot 2a-as in Fig. 1-and the leaves are set by means of a member 15 which bears two cam portions 15b, 15a engaged respectively under spring loading (not shown) by pins 11, 13 on the respective leaves and which is coupled-in known manner-to a scanner 4 for an exposure meter pointer 3. For manual setting of the diaphragm, member 16 is rotated in the clockwise direction from the position of Fig. 1, whereupon cam 16b, 16a thereon respectively engage pins 12, 13 on the two leaves and pivot them through their maximum aperture defining positions to the said second range. Areas 9, 10 may be in the shape of quadrilaterals (as shown), polygons, elipses, or approximate elipses. In modifications the positions of the co-operating pins and cams may be interchanged, each blade 9 and 10 may be provided with only one pin and the cams may be in the form of slots. The blades 9 and 10 may be provided with separate pivot points. In further modification, the member 16 may be coupled to a follow-up pointer or may be coupled to a second automatic exposure regulating means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA34614A DE1140810B (en) | 1960-05-11 | 1960-05-11 | Aperture for photographic cameras with exposure control |
Publications (1)
Publication Number | Publication Date |
---|---|
GB906362A true GB906362A (en) | 1962-09-19 |
Family
ID=6928634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1668961A Expired GB906362A (en) | 1960-05-11 | 1961-05-08 | Improvements in and relating to a diaphragm for a photographic camera |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH384359A (en) |
DE (1) | DE1140810B (en) |
GB (1) | GB906362A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1244563B (en) * | 1965-07-26 | 1967-07-13 | Prontor Werk Gauthier Gmbh | Lens diaphragm for photographic cameras with two diaphragm blades that can be moved in opposite directions |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT208216B (en) * | 1957-11-12 | 1960-03-25 | Kamera & Kinowerke Dresden Veb | Exposure meters or regulators for photographic or cinematographic purposes with a cover plate arranged in front of the photocell and regulating the incidence of light |
AT207683B (en) * | 1958-01-25 | 1960-02-25 | Gossen & Co Gmbh P | Photoelectric shutter control for cameras |
-
1960
- 1960-05-11 DE DEA34614A patent/DE1140810B/en active Pending
-
1961
- 1961-05-02 CH CH513161A patent/CH384359A/en unknown
- 1961-05-08 GB GB1668961A patent/GB906362A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1140810B (en) | 1962-12-06 |
CH384359A (en) | 1964-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1213541A (en) | Photographic camera | |
GB906362A (en) | Improvements in and relating to a diaphragm for a photographic camera | |
GB1339587A (en) | Diaphragm assembly for an interchangeable lens of a camera | |
GB918457A (en) | Photographic camera with an automatic exposure regulating device | |
GB1194393A (en) | Improvements in and relating to Photographic Cameras | |
GB944924A (en) | Improvements in or relating to photographic cameras | |
GB1042966A (en) | Improvements in or relating to photographic and cinematographic cameras | |
GB1278819A (en) | A diaphragm setting device for diaphragm blade | |
GB710978A (en) | Improvements relating to photographic lens shutters | |
US3031939A (en) | Photographic camera | |
US3593639A (en) | Apparatus for variably masking a photoelectric cell in a photographic apparatus | |
GB1258039A (en) | ||
GB969333A (en) | Photographic camera with an exposure regulating device | |
GB1219509A (en) | A camera capable of automatic switching between built-in exposure controls for daylight and flash photographing | |
GB889965A (en) | A photographic objective with a light meter attached to it | |
GB965913A (en) | Photographic camera including an exposure value setting device | |
GB968098A (en) | Photographic camera with an automatic exposure value setting device | |
GB921333A (en) | An automatic photographic exposure control | |
GB1321492A (en) | Photographic camera | |
GB1086801A (en) | Automatic exposure control device for flashlight photography | |
GB1185085A (en) | Self-Aligning Slit Mechanism | |
GB876081A (en) | Improvements in or relating to photographic cameras | |
US3030871A (en) | Photographic camera | |
GB802020A (en) | Improvements in or relating to photographic camera shutters | |
GB1057320A (en) | Photographic shutter |