Camera indication device

Details Camera indication device Camera indication device

1978-10-30

1980-01-08

Gellner, Michael L.

G03B 1718

Patent

active

041825560

ABSTRACT:
An indication device in a single lens camera of through-the-lens automatic exposure control type. The device comprises an aperture control device for controlling an aperture value by utilizing an object brightness (B), a film sensitivity (S) and a manual shutter speed (T). Also, a shutter control device is employed in which stopped-down metering is carried out by using an aperture value (A) controlled by the aperture control device. An actual aperture value controlled by the aperture value (A) and a shutter speed are automatically set according to the object brightness and film sensitivity to have a suitable exposure value according to the following equation:

REFERENCES:
patent: 4089015 (1978-05-01), Uno et al.
patent: 4141633 (1979-02-01), Uno et al.

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