Photography – With object illumination for exposure – Having preexposure illumination
Reexamination Certificate
2006-01-17
2006-01-17
Perkey, W.B. (Department: 2851)
Photography
With object illumination for exposure
Having preexposure illumination
C396S157000, C396S171000, C396S182000
Reexamination Certificate
active
06987931
ABSTRACT:
A flash control device has selectable two light emission modes. The first light emission mode causes a remote flash part to perform a light emission with a main light emission of a master flash part. The second light emission mode causes a remote flash part to perform a light emission with a pulse light emission (communication light emission) of the master flash part. Light emission indication of the communication light emission is transmitted at a timing preceding the main light emission by a predetermined wait time period. When the main light emission is performed within a predetermined light-emission start time period after the shutter is released, the flash control device automatically selects the first light emission mode, and selects the second light emission mode otherwise. Accordingly, when performing a rear synchronous photographing operation, the remote flash part can be effectively prevented from mistakenly performing a light emission.
REFERENCES:
patent: 6512890 (2003-01-01), Kawasaki et al.
patent: A 6-194725 (1994-07-01), None
patent: A 2000-89306 (2000-03-01), None
Nikon Corporation
Oliff & Berridg,e PLC
Perkey W.B.
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