Automatic focus indicating device for camera

Details Automatic focus indicating device for camera Automatic focus indicating device for camera

1980-01-31

1982-05-11

Hix, L. T.

354 60E, G03B 1318

Patent

active

043290329

ABSTRACT:
An automatic focus indicating device especially adapted for use with a single lens reflex camera in which a contrast signal is produced by scanning the image of an object being viewed through the photographing lens of the camera. This signal is converted into an indication signal which may be either an audio or a visual signal. As the lens is moved to positions near the focus point, the indicating device is activated to a first mode. As the lens is set precisely upon the point of focus, the indicating device operates in a second mode. In this manner, the camera is well adapted for both hand-held and fixed position usage.

REFERENCES:
patent: 3743416 (1973-07-01), Widmer et al.
patent: 4117325 (1978-09-01), Holle et al.

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