Camera provided with a device for generating a signal representa

Details Camera provided with a device for generating a signal representa Camera provided with a device for generating a signal representa

1981-06-30

1986-07-15

Perkey, William B.

354483, G03B 7087, G03B 7099

Patent

active

046002880

ABSTRACT:
In an electromagnetically driven diaphragm shutter having the shutter blade serving at the same time as the diaphragm, uses a quasi-TTL actual aperture light measuring system for measuring the incident light by providing the light measuring element at the auxiliary opening (auxiliary aperture) whose opening amount varies in proportion to that of the principal opening. The auxiliary opening is variable with the opening of the shutter blades. Structure is provided for generating a signal representative of the finished state of an exposure which is adapted to detect the output variation of the light measuring element at the auxiliary aperture when the shutter is closed and then to supply the signal to enable subsequent action such as start of motorized film winding.

REFERENCES:
patent: 3950766 (1976-04-01), Erlichman et al.
patent: 4009866 (1977-03-01), Iwata et al.
patent: 4258990 (1981-03-01), Arisaka et al.

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