Aperture decision system for flash photographing

Details Aperture decision system for flash photographing Aperture decision system for flash photographing

1988-03-16

1989-02-21

Gellner, Michael L.

354423, 354446, G03B 7095, G03B 716, G03B 1505

Patent

active

048069639

ABSTRACT:
In a system for setting the aperture in a camera for flash photography, a minimum aperture is computed in response to parameters such as distance to an object, stroboscopic guide number and film sensitivity. In one embodiment, a predetermined aperture value is preestablished in the system and the computed minimum aperture is compared therewith. Where the computed minimum aperture is below such predetermined aperture value, such computed minimum aperture is used in flash photography. On the other hand, when the computed minimum aperture is above such predetermined aperture value, an aperture larger than the predetermined minimum aperture value is used in flash photography. Other embodiments for flash aperture setting are also set forth.

REFERENCES:
patent: 4327978 (1982-05-01), Ishida et al.
patent: 4484807 (1984-11-01), Kataoka et al.
patent: 4501481 (1985-02-01), Kataoka et al.

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