Flash indication aid for cameras with manual flash

Details Flash indication aid for cameras with manual flash Flash indication aid for cameras with manual flash

1994-12-23

1996-09-10

Rutledge, D.

354471, 354473, G03B 1503, G03B 1718

Patent

active

055550460

ABSTRACT:
A device for a camera having a manually operated flash assembly includes a sensing element made from a photochromic, metameric or other material which is capable of producing visible optical density changes, such as color changes, based on the level of incident light impinging on the element. According to the invention, a reference standard having a specific optical density is adjacently positioned relative to the sensing element so that the respective optical densities can be compared prior to image capture in order to guide the user whether or not to use the flash.

REFERENCES:
patent: 456869 (1891-07-01), Watkins
patent: 1170538 (1916-02-01), Ide
patent: 1255167 (1918-02-01), Howie
patent: 4804992 (1989-02-01), Moriyama et al.

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