DE2704931A1 - SINGLE-EYE REFLECTIVE CAMERA WITH INTERNAL EXPOSURE MEASUREMENT - Google Patents

Description

ELBE-KAMERA-G'SELLSCHAFT

WITH LIMITED LIABILITY

Single-lens reflex camera with internal exposure metering

The invention relates to a single-lens reflex camera which has an adjuster which can be coupled to a coupling member of the lens-side diaphragm stopper and which counteracts its return spring according to the adjustable aperture values on the aperture stop plate is movable.

There are built in single-lens reflex cameras exposure measuring devices known that by internal measurement deliver the desired measurement result with an open aperture. For this purpose, special lenses are required which have coupling members adapted to the camera-side exposure metering device and connected to the lens-side diaphragm stopper, interchangeable lenses which do not Have coupling members, can also be attached to the camera and for the implementation of photographic Suitable for taking pictures, but exposure metering is not possible. In view of this, stops are provided in known cameras, which the return movement of the adjuster of the exposure metering device in one position that corresponds to the largest aperture (initial aperture). With the help of such a stop, exposure measurements can be carried out with the working aperture.

709836/0636

The adjuster stops when the interchangeable lenses are removed in the position that corresponds to the start aperture

To carry out work panel measurements are also Interchangeable lenses known, each aufwei a gear independent from the aperture and rigid actuator sen, through which, with the interchangeable lens attached, the adjuster of the exposure metering device can be held against its return spring in the starting position corresponding to the largest aperture Adjusters for the purpose of aperture measurement are not required. Moved when removing these interchangeable lenses due to its return spring, the adjuster moves to a basic position that deviates from the position that corresponds to the start aperture

The object of the invention is to further simplify the camera structure.According to the invention, this is achieved by that when removing the interchangeable lens, the adjuster due to its return spring from the position corresponding to the initial aperture into a basic position movable and an actuation cam is provided on the adjuster to carry out a further camera function · The actuation cam with a slide switch is expedient coupled, which, when the adjuster is in the basic position, has a main switch arranged in the measuring circuit holds in open position

709836/0638

The invention is explained using an illustrated and described exemplary embodiment. Show it:

1 shows an arrangement according to the invention with the interchangeable lens attached and

Fig. 5 shows the arrangement according to FIG. 1, with removed

Interchangeable lens

In a partially shown camera housing 1 (see FIG. 1), this can be set according to a time scale 2 Measuring mechanism 3 rotatably mounted. The measuring mechanism 3 is connected in a known manner to a photoelectric one located in the recording beam path Converter 7 connected. The tracking mark 5 of the adjuster 6 corresponds to the measuring tool pointer 4 arranged. The adjuster 6 is rotatably mounted concentrically to the measuring mechanism 3. The return spring 8 seeks the adjuster 6 clockwise. Opposite the pointer 9 provided on the setting plate 6 are several aperture scales 10a, 10b, 10c are provided.

These aperture scales 10a, 10b and 10c are used to display the aperture values for interchangeable lenses with a preselection aperture, its diaphragm stop plate 11 can be coupled via a coupling member 12 to the adjustment plate 6 of the exposure metering device is. In order to automatically take into account different initial openings, each time set Initial opening of the pointer 9 always the same position.

709836/0635

The adjuster 6 has a switching cam 14 which is connected to the switching rod 15. The switch spring 17 seeks to cause the switching rod 15 to close the main switch 16.

With the V / echselob removed, j ective 13 (see Fig. 2) the return spring 8 moves the switching rod 15 against the switching spring 17 via the switching cam 14, so that the Main switch 16 is open. When attaching the interchangeable lens 13, the adjuster is activated by the actuator 12 6 moves against its return spring 8. The switching cam 14 is pivoted downwards so that the Switching rod 15 as a result of the switching spring 17, the main switch 16 can close.

The movement of the switching rod 15 can also be used to carry out other camera functions.

709836/0635

Claims (2)

Expectations : 1. Single-lens reflex camera used to measure exposure in the recording beam path with an open aperture one with one Coupling member of the lens-side diaphragm stopper has couplable adjuster that opposes the its return spring in the positions that correspond to the aperture values that can be set on the aperture stop plate of the coupling member is movable, characterized in that when removing the interchangeable interchangeable lens (13) the adjuster (6) due to its return spring (8) from the position corresponding to the start panel in one basic position can be moved and an actuating cam (14) on the adjuster (6) for carrying out another Camera function is provided. 2. Single-lens reflex camera according to claim 1, characterized in that the actuating cam (14) with a Slide switch (15) is coupled which, when the adjuster (6) is in the basic position, has one in the measuring circuit arranged main switch (16) holds in the open position. ELBE-KAJERA-GESELLSCHAPT with limited liability Dresden, October 19, 1976
Sze / Kow. 709836 / 063i> ^