Acoustic indicating device for cameras

Details Acoustic indicating device for cameras Acoustic indicating device for cameras

1984-02-15

1985-04-23

Adams, Russell E.

354467, G03B 300

Patent

active

045126461

ABSTRACT:
A camera acoustic indicating device for indicating, by sound, attainment of an in-focus condition of a camera objective lens and warning possibility of a blur occuring exposure time due to low brightness of an object to be photographed. The sound for the in-focus indication is intermittently generated at a frequency higher than that at which the sound for the blur warning is intermittently generated. When the attainment of an in-focus condition is detected while the blur warning is being made, the warning is interrupted for a given time period during which the attainment of the in-focus condition is indicated for a short time.

REFERENCES:
patent: 4329032 (1982-05-01), Aoki et al.
patent: 4361390 (1982-11-01), Yamada
patent: 4367933 (1983-01-01), Sahara
patent: 4443086 (1984-04-01), Hosoe et al.
patent: 4466726 (1984-08-01), Nakajima

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