DD72678B1 - INTERMEDIATE INTERFACE FOR MOUNTING AN ALTERNATIVE TO A PHOTOGRAPHIC CAMERA WITH INTEGRATED PHOTOELECTRIC EXPOSURE MEASURING DEVICE - Google Patents

Description

The invention relates to an intermediate piece for attaching an interchangeable lens to a photographic camera with built-in photoelectric exposure, wherein the camera housing arranged contacts of the Belichtungsmeßvorrichtung are provided, to which a variable by the lens side panel adjuster variable resistance can be connected. For the use of a photographic camera of this type, special interchangeable lenses are known, which have a built-in and variable with the diaphragm divider variable resistor.

The invention aims to provide the possibility of using conventional, d. H. no built-in variable resistors having interchangeable lenses together with the camera type mentioned above and has the creation of a related additional device to the task.

According to the invention this is achieved in that the connectable to the camera-side contacts variable resistor is installed in the intermediate piece and adjustable by an adjusting ring which is rigidly coupled to the lens-side aperture plate.

The invention is explained with reference to an illustrated and described embodiment. The drawing shows a connected with an interchangeable intermediate piece, which is attachable to a camera-side Beuchtungsmeßvorrichtung. The interchangeable lens 5 has a built-in aperture, which is normally fully open. By turning the aperture stop 4, an aperture value can be preselected, to which the aperture can be closed before the beginning of the exposure process. The formed in the form of an intermediate ring for macro shots adapter 1 carries a clamping ring 10, with the bayonet lobes 11 of the interchangeable lens are connected.

In the intermediate piece 1, a sheet resistor 2 is installed, the two ends with resilient contact pins 13a; 13b are electrically connected. The sliding contact 3 is attached to a rotatable adjusting ring 16 which is rigidly connected via the coupling pin 6 with an actuating ring 7. On the actuating ring 7, a radially resilient coupling arm 8 is provided, which can be coupled to a specially marked point with the coupling nose 9 of the diaphragm actuator. The sliding contact 3 is electrically connected to the resilient contact pin 13c. With the bolt thread 17, the spacer 1 on the camera body 15 can be screwed

 In the camera housing 15, which is only partially shown, an exposure measuring device with a cell 18 of a known arrangement illuminated by the receiving beam path is provided, with the contacts 14a located on the front side of the camera housing 15; 14b; 14c are electrically connected. When the intermediate piece 15 is attached, the resilient contact pins 13a, 13b, 13c come into contact with the camera-side contacts 14a, 14b, 14c. By rotating the diaphragm actuator 4, the sheet resistance 2 in the intermediate piece 1 is changed until it becomes a Wheatstone in the diagonal branch Bridge lying galvanometer shows no more stop.

For this 1 sheet drawings

Claims (1)

Claim: Intermediate piece for attaching an interchangeable lens to a photographic camera with built-in photoelectric exposure, wherein arranged on the camera housing contacts of the Belichtungsmeßvorrichtung are provided, to which a changeable by the lens-side aperture adjuster variable resistance is connected, characterized in that the camera-side contacts (14a, 14b; 14c) connectable adjusting resistor (2) installed in the intermediate piece (1) and by an adjusting ring (7) is adjustable. which is rigidly coupled with the lens side diaphragm plate (4).