Camera with automatic focus and exposure control means

Details Camera with automatic focus and exposure control means Camera with automatic focus and exposure control means

1986-09-11

1988-12-20

Perkey, W. B.

354409, 354410, 354433, G03B 310, G03B 7091

Patent

active

047928204

ABSTRACT:
A camera with an AF and AE control structure including a one-shot AF mode and a continuous AF mode, in which the operability and exposure control are improved. The camera includes a unit for detecting a focusing condition of an objective lens, defined by the relationship between a position of an object to be photographed against the lens and a focus point of the lens; a unit for focusing the lens in accordance with the detected focusing condition so that the lens is moved to the in-focus position, a first light measurement unit for measuring light at a spot area corresponding to a region of the object to be detected at the detecting unit, a second light measurement means for measuring averaged light at another area broader than the first area, and a unit for controlling exposure amount. The exposure control unit determines the exposure amount on the basis of the spot metering data in a one-shot AF mode, or the averaged light measuring data which is defined as a data at a time, at least, when the lens is adjacent to the in-focus position, in a continuous AF mode.

REFERENCES:
patent: 4322142 (1982-03-01), Kawamura et al.
patent: 4464037 (1984-08-01), Terui et al.
patent: 4491403 (1985-01-01), Sakai et al.
patent: 4514073 (1985-04-01), Taniguchi et al.
patent: 4609274 (1986-09-01), Iwashita et al.

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