Focussing apparatus for cameras

Details Focussing apparatus for cameras Focussing apparatus for cameras

1976-07-30

1978-06-27

Wintercorn, Richard A.

Optics: motion pictures

Removable film strip magazine type

352140, 354201, 354224, 355 55, G03B 1912, G03B 1302

Patent

active

040978818

ABSTRACT:
A focussing apparatus is disclosed comprising a mask plate disposed in the path of light to a camera rangefinder and having a plurality of apertures of like configuration which are offset from the optical axis of the rangefinder. Light passing through the respective apertures forms on the focal plane of the rangefinder a number of separate images of an object photographed which are equal in number to the number of the apertures. Focussing is achieved by a displacement of a focussing lens in the taking lens system in the direction of the optical axis in a manner to bring the separate images into a single aligned image.

REFERENCES:
patent: 3230851 (1966-01-01), Reymond
patent: 3274912 (1966-09-01), Kasahara

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