Built-in flash camera

Details Built-in flash camera Built-in flash camera

1997-11-06

1998-11-03

Malley, Daniel P.

Photography

Flash system responsive to focal length or distance

G03B 1505

Patent

active

058323155

ABSTRACT:
A built-in flash camera includes a strobe which is flashed regularly, a photometry part for measuring a brightness within a shot visual field and an automatic exposure mechanism. A changeover brightness is set to be lower than a limitation brightness (reference external light brightness) in which an AE control can be performed. When the brightness measured by the photometry part is lower than the changeover brightness, the strobe is flashed so that the exposure of the strobe can be standard (100%). When the brightness measured by the photometry part is higher than the changeover brightness, the exposure of the strobe light is decreased to be 75% of the standard exposure. As a result, the exposure of the strobe can be prevented from being excessively large when the external light is in a proximity of the reference external light brightness.

REFERENCES:
patent: 4941009 (1990-07-01), Yoshida
patent: 5255047 (1993-10-01), Ishimaru et al.

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