DE687303C - Photographic camera with electric light meter - Google Patents
Photographic camera with electric light meterInfo
- Publication number
- DE687303C DE687303C DE1937L0092939 DEL0092939D DE687303C DE 687303 C DE687303 C DE 687303C DE 1937L0092939 DE1937L0092939 DE 1937L0092939 DE L0092939 D DEL0092939 D DE L0092939D DE 687303 C DE687303 C DE 687303C
- Authority
- DE
- Germany
- Prior art keywords
- pointer
- light meter
- photographic camera
- galvanometer
- electric light
- 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
- G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
- G03B7/06—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark by a follow-up movement of an associated reference mark to the pointer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Viewfinders (AREA)
Description
Photographische Kamera mit elektrischem Belichtungsmesser Es ist bekannt, die Übertragung des Ausschlages des Galvanometerzeigers eines Belichtungsmessers auf Einstellelemente der Kamera, wie Verschluß und Objektivblende, dadurch vorzunehmen, daß man einen zweiten mit dem Übertragungsgetriebe verbundenen Zeiger auf den ersten Zeiger einstellt. Bei Einbau des Belichtungsmessers in die Kamera ist man nun gezwungen, alle Teile, also auch den Galvanometerzeiger, möglichst klein zu halten. Hieraus ergibt sich der Nachteil, daß die Bogenlänge, über die der Zeiger ausschlägt, so klein wird, daß sie für einen normalen Einstellbereich des Verschlusses, der von i bis zu 1/1000 Sekunde reicht und etwa zehn bis zwölf Zwischenwerte besitzt, nicht groß genug ist, um jeden dieser Werte einwandfrei einstellen zu können. Hierzu kommt noch, daß, das Spitzenspiel der Zeigerachse des Galvanometers sich bei einem kurzen Zeiger nachteiliger bemerkbar macht als bei einem großen Zeiger.Photographic camera with electric light meter It is known the transmission of the deflection of the galvanometer pointer of a light meter on setting elements of the camera, such as shutter and lens diaphragm, thereby that you have a second pointer connected to the transmission gear on the first Pointer adjusts. When installing the exposure meter in the camera, you are now forced to to keep all parts, including the galvanometer pointer, as small as possible. From this there is the disadvantage that the arc length over which the pointer deflects so becomes small that they are for a normal adjustment range of the shutter, which is from i lasts up to 1/1000 of a second and has about ten to twelve intermediate values, no is large enough to be able to set each of these values properly. To this comes nor that, the tip play of the pointer axis of the galvanometer increases with a short Pointer makes noticeable more disadvantageously than with a large pointer.
Erfindungsgemäß ist dieser Nachteil dadurch behoben, daß eine Gitterplatte verwendet ist, die man über dem Zeiger dreht, bis der Zeiger parallel zwischen den Strichen der Platte erscheint. Hierdurch entsteht die bekannte Einstellung auf Lichtspalt, die eine erhöhte Genauigkeit in der Ablesung ergibt. Das Spitzenspiel des Galvanometers wirkt sich. bei .der Einstellung nicht mehr aus, und Zeiger sowie Nachstellelement'ßrauchen nicht konzentrisch zueinander zu liegen. Durch Abbildung des Einstellbildes in das Sehfeld eines mit der Kamera verbundenen Suchers wird weiterhin eine größere Aufnahmebereitschaft erzielt.According to the invention, this disadvantage is eliminated in that a grid plate is used, which is rotated over the pointer until the pointer is parallel between the Lines of the plate appears. This creates the well-known setting on the light gap, which gives an increased accuracy in the reading. The top play of the galvanometer affects. When the setting is no longer off, and the pointer and the adjusting element smoke not to be concentric to each other. By mapping the setting image into the The field of view of a viewfinder connected to the camera continues to provide greater exposure achieved.
In der Zeichnung ist die Erfindung in einem Ausführungsbeispiel dargestellt, und zwar zeigen: Abb. i einen Belichtungsmesser in eine photographische Kamera eingebaut, teilweise im Schnitt, Abb. z eine Teilansicht des Getriebes, Abb. 3 das Bild des Einstellvorganges, wie es sich im Sucher darbietet.In the drawing, the invention is shown in an exemplary embodiment, namely show: Fig. i a light meter built into a photographic camera, partially in section, Fig. z a partial view of the transmission, Fig. 3 the image of the Adjustment process as it is presented in the viewfinder.
In der photographischen Kamera i ist das mit einer nicht dargestellten photographischen Zelle verbundene Galvanometer :2 mit seinem Zeiger 3 angeordnet. Über diesem ist die Gitterplatte q. in dem Zahnrad 5 gelagert, das mit dem weiteren Zahnrad 6 kämmt. Letzteres wird über den Hebel 7 von dem mit der Kurve 8 versehenen Hebel 9 gesteuert, der zum Teil aus dem Kameragehäuse hervorragt. Auf der Achse to des Hebels 9 ist das Kegelrad i i befestigt, das mit den weiteren Kegelrädern 1z, 13, 14 ein Ausgleichsgetriebe bildet. Hiervon führt zum Verschluß 2i die Achse 15, ausgehend von Kegelrad 1a über die weiteren Kegelräder 16 und 17. Zur Objektivblende wird der Anteil des Meßergebnisses von Kegelrad 13 aus über Zahnsektor 18 und über das mit dem Objektiv i9 verbundene Zahnrad 2o weitergeleitet.In the photographic camera i, the galvanometer, connected to a photographic cell (not shown): 2, is arranged with its pointer 3. Above this is the grid plate q. stored in the gear 5 which meshes with the further gear 6. The latter is controlled via the lever 7 of the lever 9 provided with the curve 8, which partially protrudes from the camera housing. On the axis to of the lever 9, the bevel gear ii is attached, which forms a differential gear with the other bevel gears 1z, 13, 14. From this, the axis 15 leads to the shutter 2i, starting from the bevel gear 1a via the further bevel gears 16 and 17. To the lens aperture, the portion of the measurement result is passed on from the bevel gear 13 via toothed sector 18 and via the gear 2o connected to the lens i9.
Oberhalb der Gitterplatte q. ist das Prismensystem 2a mit der Linse 23 angeordnet, die das Bild der Anzeigevorrichtung so in den Sucherstrahlengang hineinlenkt, daß es durch das Okular 2q. zugleich mit dem vom Sucherobjektiv 25 und Umkehrprisma 26 gefaßten -Sucherbild 27 gesehen wird.Above the grid plate q. the prism system 2a is arranged with the lens 23 , which directs the image of the display device into the viewfinder beam path so that it passes through the eyepiece 2q. is seen at the same time with the viewfinder image 27 captured by the viewfinder lens 25 and erecting prism 26.
Für die Einstellung der Kamera setzt man die Photozelle dem Objektlicht aus und dreht nunmehr durch Betätigen des Hebels 9 die Gitterplatte q. so lange, bis der Zeiger 3 zwischen zwei benachbarten Gitterstreifen zu liegen kommt. Die Abb. 3 zeigt diesen Vorgang, in dem zunächst das Einstellbild unter dem Sucherbild 27 dargestellt ist, und dann, vergrößert, die Lage der Gitterplatte 4 zum Zeiger 3 vor und nach dem Einstellen.To adjust the camera, the photocell is exposed to the light of the object and the grating plate q is now rotated by actuating the lever 9. until the pointer 3 comes to rest between two adjacent grid strips. Fig. 3 shows this process, in which first the setting image is shown under the viewfinder image 27 , and then, enlarged, the position of the grid plate 4 to the pointer 3 before and after the setting.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937L0092939 DE687303C (en) | 1937-07-23 | 1937-07-23 | Photographic camera with electric light meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937L0092939 DE687303C (en) | 1937-07-23 | 1937-07-23 | Photographic camera with electric light meter |
Publications (1)
Publication Number | Publication Date |
---|---|
DE687303C true DE687303C (en) | 1940-01-26 |
Family
ID=7287583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1937L0092939 Expired DE687303C (en) | 1937-07-23 | 1937-07-23 | Photographic camera with electric light meter |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE687303C (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE746265C (en) * | 1940-03-13 | 1944-06-17 | Johannes Dr Heidenhain | Measuring mark system |
DE861192C (en) * | 1941-03-15 | 1952-12-29 | Bosch Gmbh Robert | Aperture adjustment device for photographic or cinematographic cameras |
DE915652C (en) * | 1941-02-05 | 1954-07-26 | Agfa Camera Werk Ag | Photographic camera |
DE1085033B (en) * | 1955-01-29 | 1960-07-07 | Voigtlaender Ag | Photographic camera with coupling devices for lens aperture, exposure time and film speed |
DE974330C (en) * | 1941-06-20 | 1960-11-24 | Leitz Ernst Gmbh | Photographic camera with built-in electric light meter |
DE1097809B (en) * | 1955-03-18 | 1961-01-19 | Alois Handler Ing | Camera, especially cinema camera |
DE975229C (en) * | 1948-10-02 | 1961-10-05 | Gossen & Co G M B H P | Exposure control device for photographic cameras |
DE1118000B (en) * | 1957-05-11 | 1961-11-23 | Agfa Ag | Photographic camera with built-in light meter |
DE1146357B (en) * | 1956-11-30 | 1963-03-28 | Zeiss Ikon Ag | Camera with coupled photoelectric light meter |
DE1170243B (en) * | 1958-01-24 | 1964-05-14 | Ernst U Wilhelm Bertram | Differential gear for cameras with built-in light meter |
DE1178696B (en) * | 1955-02-14 | 1964-09-24 | Gustav Maass | Photographic camera with coupled exposure meter |
DE1269886B (en) * | 1957-12-28 | 1968-06-06 | Elbe Kamera Gmbh | Photographic camera with focal plane shutter and built-in light meter |
-
1937
- 1937-07-23 DE DE1937L0092939 patent/DE687303C/en not_active Expired
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE746265C (en) * | 1940-03-13 | 1944-06-17 | Johannes Dr Heidenhain | Measuring mark system |
DE915652C (en) * | 1941-02-05 | 1954-07-26 | Agfa Camera Werk Ag | Photographic camera |
DE861192C (en) * | 1941-03-15 | 1952-12-29 | Bosch Gmbh Robert | Aperture adjustment device for photographic or cinematographic cameras |
DE974330C (en) * | 1941-06-20 | 1960-11-24 | Leitz Ernst Gmbh | Photographic camera with built-in electric light meter |
DE975229C (en) * | 1948-10-02 | 1961-10-05 | Gossen & Co G M B H P | Exposure control device for photographic cameras |
DE1085033B (en) * | 1955-01-29 | 1960-07-07 | Voigtlaender Ag | Photographic camera with coupling devices for lens aperture, exposure time and film speed |
DE1178696B (en) * | 1955-02-14 | 1964-09-24 | Gustav Maass | Photographic camera with coupled exposure meter |
DE1097809B (en) * | 1955-03-18 | 1961-01-19 | Alois Handler Ing | Camera, especially cinema camera |
DE1146357B (en) * | 1956-11-30 | 1963-03-28 | Zeiss Ikon Ag | Camera with coupled photoelectric light meter |
DE1118000B (en) * | 1957-05-11 | 1961-11-23 | Agfa Ag | Photographic camera with built-in light meter |
DE1269886B (en) * | 1957-12-28 | 1968-06-06 | Elbe Kamera Gmbh | Photographic camera with focal plane shutter and built-in light meter |
DE1170243B (en) * | 1958-01-24 | 1964-05-14 | Ernst U Wilhelm Bertram | Differential gear for cameras with built-in light meter |
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