Low scene brightness indicator for use in a photographic camera

Details Low scene brightness indicator for use in a photographic camera Low scene brightness indicator for use in a photographic camera

1977-10-27

1980-04-22

Adams, Russell E.

354 53, 354 57, 354 61, 354289, G03B 1720

Patent

active

041992377

ABSTRACT:
A photographic camera of the type having distinct ambient and flash exposure modes of operation is provided with a low power consuming, low scene brightness detecting and indicating apparatus by which a visual signal is displayed in the camera's viewfinder to alert the camera user of the presence of a low scene brightness condition requiring that the camera be used in its flash exposure mode of operation with an artificial light source to illuminate the scene.

REFERENCES:
patent: 3220326 (1965-11-01), Scudder
patent: 3224350 (1965-12-01), Stimson
patent: 3303494 (1967-02-01), Taylor et al.
patent: 3540038 (1969-07-01), Taylor
patent: 3789395 (1974-01-01), Michels
patent: 3810207 (1974-05-01), Mudler
patent: 3855601 (1974-12-01), Uchiyama et al.
patent: 3979747 (1976-09-01), Candida
patent: 4007469 (1977-02-01), Land et al.
patent: 4015255 (1977-03-01), Wood
patent: 4027317 (1977-05-01), Hauser et al.

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