Camera with exposure control mechanism

Details Camera with exposure control mechanism Camera with exposure control mechanism

1976-09-22

1978-02-21

Hix, L. T.

354 59, G03B 708

Patent

active

040756408

ABSTRACT:
An exposure control mechanism for a camera which includes a light measuring circuit having a photosensitive element disposed for receiving scene light reflected at substantially the entire area of both the surface of a film and a leading curtain of a focal plane shutter after the light has passed through an objective and a diaphragm. An operable member is provided for moving a light restricting member from a non-operative to an operative position where the member respectively permits the scene light reflected at the entire area or the scene light reflected at a small predetermined area of the surface to be received by the photosensitive element. An alternative light measuring circuit has a plurality of photosensitive elements respectively disposed for receiving the scene light reflected at different small predetermined areas of the surface. In this case, switches are provided for selectively activating the photosensitive elements of the light measuring circuit.

REFERENCES:
patent: 3842424 (1974-10-01), Tsunekawa et al.
patent: 3855601 (1974-12-01), Uchiyama et al.
patent: 3864699 (1975-02-01), Tsunekawa et al.

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