Electronic flash device

Details Electronic flash device Electronic flash device

1982-12-10

1984-08-14

Adams, Russell E.

354423, G03B 1505

Patent

active

044653530

ABSTRACT:
An electronic flash device including a main light part, a pre-emission light part, an illumination direction changing mechanism for changing the illumination directions of the main light part and the pre-emission light at the same time in the case of bounced light photography, and a control mechanism for deciding the aperture value of the photographing lens in accordance with the light measuring level of the reflected pre-emission light and controlling the main light part with the light adjusting level corresponding to the aperture value.

REFERENCES:
patent: 3823410 (1974-07-01), Tokutomi et al.
patent: 4242616 (1980-12-01), Takematsu
patent: 4327978 (1982-05-01), Ishida et al.
patent: 4367023 (1983-01-01), Ishida et al.

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