DE2041937C

DE2041937C - Single lens reflex camera with light measurement through the lens and electronically operated shutter

Info

Publication number: DE2041937C
Application number: DE19702041937
Authority: DE
Inventors: Masaru Sagamihara Kanagawa Yamamoto (Japan)
Original assignee: Yashica Co Ltd
Current assignee: Yashica Co Ltd
Priority date: 1969-08-27
Filing date: 1970-08-24
Publication date: 1973-03-08

Description

ist. Dagegen liegt der Kontakt 22 auf dem Kontakt 23, wenn der Deckel 20 die Buchse 19 freigibt. Der Kontakt 23 ist mit einer Klemme des zweiten Photowiderstandes 14 verbunden. Die andere Klemme des zweiten Photowiderstandei 14 ist am Anschlußpunkt 25 an den Verschlußauslösekreis geführt.is. In contrast, the contact 22 lies on the contact 23 when the cover 20 releases the socket 19. the Contact 23 is connected to one terminal of the second photoresistor 14. The other terminal of the second photoresistor 14 is led at connection point 25 to the shutter release circuit.

Wenn Kein Elektronenblitz oder eine Blitzlampe verwendet wird, so schließen die Kontakt. 22 und 24, und der zweite Phc to widerstand 14 ist vom Verschlußauslösekreis abgetrennt, während die Speicherschaltung 6 an den Verschlußauslösekreis über den Kontakt 24 angekoppelt ist und damit die bekannte elektronische Auslöseschaltung bildet. Somit wird im Speichere ein Signal gespeichert, das der durch den Innenphotowiderstand 3 "mnittelbar vor der Verschlußauslösung gemessenen Lichtmenge entspricht. Gleichzeitig mit der Betätigung des Verschlusses öffnet der Schalter 9.If no electronic flash or a flash lamp is used , the contacts close. 22 and 24, and the second Phc to resistor 14 is separated from the shutter release circuit, while the memory circuit 6 is coupled to the shutter release circuit via the contact 24 and thus forms the known electronic release circuit. Thus, a signal is stored in the memory which corresponds to the amount of light measured by the internal photoresistor 3 ″ before the shutter is released. The switch 9 opens at the same time as the shutter is actuated.

Wenn andererseits eine Aufnahme mit einer Blitzlampe oder einem elektronischen Blitzgerät gemacht wird, so schaltet der Kontakt 22 vom Kontakt 24 auf den Kontakt 23 um, und an Stelle des Speichers 6 tritt der zweite Photowiderstand 14. Wenn somit eine Blitzlampe oder ein Elektronenblitz an die Buchse 19On the other hand, when taking a picture with a flash lamp or an electronic flash device is made, the contact 22 switches on from the contact 24 the contact 23 around, and instead of the memory 6, the second photoresistor 14 occurs Flash lamp or electronic flash to socket 19

S angeschlossen ist, dann wird die Belichtungszeit durch den zweiten Photowiderstand 14 anstatt durch den Innenphotowiderstand 3 bestimmt. Somit öffnet der Schalter 9 gleichzeitig mit der Zündung der Blitzlampe oder des Elektronenblitzes synchron mit derS is connected, then the exposure time determined by the second photo resistor 14 instead of the inner photo resistor 3. Thus opens the switch 9 simultaneously with the ignition of the flash lamp or the electronic flash synchronously with the

ίο Verschlußauslösung, und der Photowiderstand 14 setzt die durch den Gegenstand reflektierte und durch den Schlitz 16 der Irisblende 15 gelangende Lichtmenge in eine elektrische Größe um, die durch Aufla-/ dung des Kondensators 8 die geeignete Belichtungs-ίο shutter release, and the photo resistor 14 sets the amount of light reflected by the object and passing through the slit 16 of the iris diaphragm 15 into an electrical quantity which, by charging the capacitor 8, provides the appropriate exposure

zeit für Aufnahmen mit Blitzlampen oder Elektronenblitzen bestimmt.time for taking pictures with flash lamps or electronic flashes.

Auf diese Weise kann i"?ch bei Aufnahmen mit Blitzlampen oder Elektronenblitzen die richtige Belichtung in Abhängigkeit von der von einem Gegen-This way I can take pictures with Flash lamps or electronic flashes provide the correct exposure depending on the

stand reflektierten Lichtmenge gewährleistet werden.level of reflected light can be guaranteed.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 switches the second photoelectric converter, claims: when a flash lamp or an electronic flash device is connected to the camera.

1. SLR camera with light measurement by According to a development of the invention, the . the lens and electronically operated control 5 iris diaphragm belonging to the lens using a different

Finally, especially the camera for real beechers, it needs to be connected to the second photoelectric converter even when taking pictures with flash lamps or iris diaphragms,
electronic flash units, with a memory The drawing shows a preferred Ausfuhningszum the storage of a photoelectric example de - invention, partly in perspective on-transducer, which sees in the way of the ob- io and partly executed as a block diagram,
According to the schexna'ischcn representation of the drawing, the camera has the objective 1 and the camera has the objective 1 and shows that a second photoelectric swivel mirror 2 with the transparent area 2 '. Converter (14) is arranged so that it receives the light reflected from a part of the light incident through the lens 1 receiving object directly through the transparent area 2 ', and that a switch (22, 23, 24) in front - a photoelectric transducer, e.g. B. seen, is that the shutter release circuit (7) a built in the camera Photowiderstano from the memory (6) to the second photoelek- while the rest of the light to the prism 4 of the Su tric converter (14) switches when one rather «5 is directed towards it. The built-in photowider flash lamp or an electronic flash device on ao stand 3 is connected to a memory 6 which is connected as the camera. The input element of the shutter release circuit 7 is used.

2. Single-lens reflex camera laughs claim 1, there- As is known, there is a shutter release mechanism! characterized by, dpß a first to the object 7 from the capacitor 8, which is connected to the resistor tiv (1) belonging iris diaphragm and a second one interacts with the value of the photoresistor 3, second photoelectric converter (14) is included in order to determine the time constant for the shutter rende diaphragm (15) and a device (18, men. A contact 9 is connected to the closure 18 ') for the positive connection of the two that he is at the same time with its actuation Aperture is provided. opens. The electromagnet 12 is located above the switch 11

for closing the veneer to the voltage source 10

30 connected. Because the structure and the way it works

the electronically operated one described above

Closure is generally known, a more detailed description seems unnecessary.

The invention relates to a reflex camera. A second photoresistor 14 is used for measurement

provided with light measurement through the lens and electro- 35 of the outside light. A switch 22 closes

nically operated shutter, in particular a line of the second photoresistor 14 at the same time as the

mera for correct exposures even when taking pictures interruption of the electrical connection between

with flash lamps or electronic flash units. the memory 6 and the shutter release circuit 7

In the case of a camera in which the photoelectric activates the shutter release circuit when an electronic

Transducer, e.g. B. a photoresistor, connected in the way 40 cal flash device or a lamp flash

of the light passing through the lens.

The second photoresistor 14 is behind the Fen track of the light when the shutter is triggered is arranged in the camera housing 12 '. Between be swiveled out, and thus must be through the window 13 and the photoresistor 14 is Photoresistance measured amount of light directly 45 the iris diaphragm 15 with a widening before releasing the shutter up to the slit

16. Thus, the amount of light incident on the photoresistor 14 in a known manner through the window 13 at the end of the shutter actuation will be stored. A camera of this type is determined for by the width of the slot 16. If the single-flash exposures are used, this corresponds to the position of the diaphragm through the rather stored signal of the ring 17 rotated before the ignition of the flash 50 driver 17 ', which corresponds to the prevailing object brightness and does not represent the position of the iris diaphragm, not shown of the objective measured value of the reflected from an object is actuated by a with the toothing on the UmLights, which is illuminated by the flash, since the ring 17 engaging pinion 18 so the ignition of the flash lamp with the shutter release as by the toothing on The scope of the iris diaphragm is synchronized. This results in a wrong fit, which engages the pinion 18 ', which on the smooth opening, since the shutter is not attached by the light shaft like the pinion 18.
is controlled, which is reflected by the flashed counter-A closure cover 20 for the socket 19 to the stand. Connection of a flash lamp or an electronic one

The object of the invention is to provide a flash unit (not shown) on the camera body

Single-lens reflex camera of the known type is provided in such a way that 60 is provided, with the cover 20 normally

that the existing timing circuit is also held by the spring 21 so that he the

covered when taking pictures with flash lamps or electronic socket 19. The cover 20 is in contact

Bützgeräte can be used. 22, which is electrically connected to one side of the capacitor 8

The invention solves this problem in that one is connected. The contact 22 optionally closes with

second photoelectric converter is arranged 65 to contacts J3 and 24.

that it di- When the cover 20 due to the spring tension

directly receives, and that a switch provided covers the socket 19, the contact 22 is on

which is the shutter release circuit from the memory to the contact 24, which is connected to the memory 6