Multi-area focus detection apparatus for detecting focus either

Details Multi-area focus detection apparatus for detecting focus either Multi-area focus detection apparatus for detecting focus either

1994-09-30

1995-10-03

Adams, Russell E.

354410, G03B 1336

Patent

active

054556546

ABSTRACT:
Multi-area focus detection apparatus for detecting focus either automatically or intentionally includes focus detection structure for detecting focus information to a plurality of points within a photographing area formed by the objective lens. Automatic selection circuitry is provided for automatically selecting a distance measuring point from among the plural distance measuring points. Intentional selection circuitry is provided for selecting an arbitrary distance measuring point from among the plural distance measuring points in accordance with a photographer's intention. The number of distance measuring points which are subject to selection by the automatic selection circuitry is different from the number of distance measuring points which are subject to selection by the intentional selection circuitry. Preferably, the number of distance measuring points for intentional selection is less than (but a subset of) the number of distance measuring points for automatic selection. Preferably, the intentional selection is performed by detecting the visual axis of the photographer.

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