What is full area averaging?

Some articles on full area averaging:

History Of The Single-lens Reflex Camera - Chronology - 1960s
... center-the-needle, open aperture, full area averaging metering with auto-diaphragm lenses ... center-the-needle TTL metering (stop-down aperture, full area averaging) ... Had a stop-down aperture, full area averaging, CdS light meter linked via a four transistor circuit board to an extinguish-both-red-over-and-underexposur ...

Famous quotes containing the words full and/or area:

    Ah! how much a mother learns from her child! The constant protection of a helpless being forces us to so strict an alliance with virtue, that a woman never shows to full advantage except as a mother. Then alone can her character expand in the fulfillment of all life’s duties and the enjoyment of all its pleasures.
    HonorĂ© De Balzac (1799–1850)

    Whatever an artist’s personal feelings are, as soon as an artist fills a certain area on the canvas or circumscribes it, he becomes historical. He acts from or upon other artists.
    Willem De Kooning (b. 1904)