Electronic flash control system for use in a fixed focus lens ca

Details Electronic flash control system for use in a fixed focus lens ca Electronic flash control system for use in a fixed focus lens ca

1990-09-04

1992-05-26

Perkey, W. B.

354416, 354137, G03B 700, G03B 1503

Patent

active

051172526

ABSTRACT:
The depth of field of a fixed focus lens in an electronic flash camera is automatically increased and the sharpness or clarity of an image formed by the lens is improved for subjects located closer to the camera than the near end of the lens' normal depth of field by firing the camera's electronic flash at an aperture size that is smaller than one that would normally be used for such closer subjects.

REFERENCES:
patent: 4188103 (1980-02-01), Biber et al.
patent: 4256995 (1981-03-01), Ishida
patent: 4459005 (1984-07-01), Harvey
patent: 4669850 (1987-06-01), Uchiyama et al.
patent: 4878081 (1989-10-01), Kishida et al.
patent: 4894678 (1990-01-01), Farrington et al.

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