DE2435788A1 - Reflex viewfinder for photographic cameras - has direct viewing or parallel observation options and pivoted mirror and inverting prisms - Google Patents
Reflex viewfinder for photographic cameras - has direct viewing or parallel observation options and pivoted mirror and inverting prismsInfo
- Publication number
- DE2435788A1 DE2435788A1 DE2435788A DE2435788A DE2435788A1 DE 2435788 A1 DE2435788 A1 DE 2435788A1 DE 2435788 A DE2435788 A DE 2435788A DE 2435788 A DE2435788 A DE 2435788A DE 2435788 A1 DE2435788 A1 DE 2435788A1
- Authority
- DE
- Germany
- Prior art keywords
- viewfinder
- prisms
- ground glass
- mirror
- photographic cameras
- 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.)
- Pending
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
- G03B13/02—Viewfinders
- G03B13/06—Viewfinders with lenses with or without reflectors
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- 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
- G03B19/00—Cameras
- G03B19/02—Still-picture cameras
- G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Viewfinders (AREA)
Abstract
Description
Umschaltbar er Reflexsucher für fotografische Kameras mit wahlweiser Direktbetrachtung der Mattscheibe oder Paralleleinblick Es ist bekannt, daß die heute meist verkauften Kameras einen Spiegelreflexsucher haben, wobei das von dem Objektiv entworfene Bild durch einen in 45 0stehenden Spiegel auf eine zur Objektivachse parallel liegende Mattscheibe geworfen wird. Die Mattscheibe wird durch ein Dachkantprisma betrachtet. Das Bild auf der Mattscheibe ist seitenverkehrt; es wird durch die Dachkante umgedreht, so daß im Suchereinblick ein aufrechtstehendes, seitenrichtiges Bild zu sehen ist. Das Dachkantenprisma ist jedoch bei den teuersten Systemkameras austauschbar gegen einen Lichtschachtsucher.Switchable reflex viewfinder for photographic cameras with optional Direct viewing of the ground glass or parallel viewing It is known that the Most popular cameras today have an SLR viewfinder, with that of the Objectively designed image through a mirror at 45 ° on a lens axis parallel ground glass is thrown. The ground glass is made by a roof prism considered. The picture on the screen is reversed; it gets through the roof edge turned around, so that in the viewfinder an upright, laterally correct image you can see. However, the roof prism is interchangeable in the most expensive system cameras against a light shaft finder.
Die Lichtschachtsucher haben sich besonders bei der künstlerischen Bildgestaltung bewährt. Ausserdem ist so ein Sucher beim Fotografieren vom Stativ viel bequemer als der übliche Dachkantenprismasucher. Nun verteuern aber die austauschbaren Sucher die Foto ausrüstung. Das Austauschen ist umständlich, genauso das Herumtragen der verschiedenen Sucher.The light shaft seekers have proven themselves particularly in the artistic Image design proven. There is also such a viewfinder when taking photos from a tripod much more convenient than the usual roof prism viewfinder. But now the exchangeable ones are becoming more expensive Viewfinder the photo equipment. Exchanging them is cumbersome, as is carrying around of the various viewfinders.
Um diesem Nachteil abzuhelfen, wird erfindungsgemäß über die übliche Mattscheibe der Spiegelreflexkamera ein starrer Lichtschacht angeordnet. In diesem Lichtschacht befindet sich ein, um eine Achse parallel zur Objektivachse kippbarer Spiegel, der in zwei Stellungen zu fixieren ist. In der einen Stellung steht er ungefähr 450 zur Mattscheibe geneigt. Er wirft dann das Mattscheibenbild in ein an der Lichtschachtseite angebrachtes Fenster. Hinter dem Fenster befindet sich ein Prisma, das das Bild wieder nach unten wirft. Unterhalb des ersten Prismas ist ein zweites Prisma angeordnet, das die Lichtstrahlen des Bildes wieder in eine Richtung parallel zur Objektivachse lenkt und auf die mit einer üblichen Okularlinse ausgestattete Einblicksöffnung wirft. Wenn der Spiegel im Lichtschacht in der eben beschriebenen Stellung steht, ist der Suchereinblick parallel zur Objektivachse, genauso, wie bei den üblichen, mit Dachkantenprisma ausgestatteten Spiegelreflexsuchern. In diesem Fall ist selbstverständlich der Lichtschacht oben mit einer Klappe lichtdicht verschlossen. Das durch die Einblicksöffnung gesehene Bild ist aufrechtstehend und seitenrichtig.In order to remedy this disadvantage, the invention is based on the usual The focusing screen of the single lens reflex camera is arranged in a rigid light shaft. In this There is a light shaft that can be tilted about an axis parallel to the objective axis Mirror that can be fixed in two positions. He is in one position inclined about 450 to the ground glass. He then throws in the screen image window attached to the light shaft side. Behind the window is a prism that throws the image back down. Below the first prism is a second prism is arranged, which returns the light rays of the image in one direction steers parallel to the objective axis and is equipped with a conventional eyepiece lens Viewing opening throws. When the mirror in the light shaft is in the position just described, the viewfinder is parallel to the lens axis, just like with the usual, SLR viewfinder equipped with a roof prism. In this case it goes without saying the light shaft at the top is closed light-tight with a flap. That through the viewing opening The image seen is upright and the wrong way round.
Soll der Sucher umgeschaltet werden, so wird die Verdeckklappe des Lichtschachts aufgeklappt. In diesem Fall schwingt der in dem Lichtschacht angebrachte Spiegel auf die Seite. Er verdeckt dabei das seitliche Fenster. In diesem Fall haben wir einen Lichtschachtsucher, in dem das Mattscheibenbild von oben direkt betrachtet werden kann.If the viewfinder is to be switched, the top flap of the Light shaft opened. In this case, the one mounted in the light shaft vibrates Mirror on the side. He covers the side window. In this case have like a light shaft finder in which the screen image is viewed directly from above can be.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435788A DE2435788A1 (en) | 1974-07-25 | 1974-07-25 | Reflex viewfinder for photographic cameras - has direct viewing or parallel observation options and pivoted mirror and inverting prisms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435788A DE2435788A1 (en) | 1974-07-25 | 1974-07-25 | Reflex viewfinder for photographic cameras - has direct viewing or parallel observation options and pivoted mirror and inverting prisms |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2435788A1 true DE2435788A1 (en) | 1976-02-12 |
Family
ID=5921487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2435788A Pending DE2435788A1 (en) | 1974-07-25 | 1974-07-25 | Reflex viewfinder for photographic cameras - has direct viewing or parallel observation options and pivoted mirror and inverting prisms |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2435788A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4119985A (en) * | 1975-11-04 | 1978-10-10 | Zenza Bronica Industries, Inc. | View finder for reflex camera |
-
1974
- 1974-07-25 DE DE2435788A patent/DE2435788A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4119985A (en) * | 1975-11-04 | 1978-10-10 | Zenza Bronica Industries, Inc. | View finder for reflex camera |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHJ | Non-payment of the annual fee |