Slave electronic flash unit for a camera

Details Slave electronic flash unit for a camera Slave electronic flash unit for a camera

1990-02-09

1991-06-11

Gellner, Michael L.

Illumination

Supported by vehicle structure

Condition responsive

362 8, 3541491, 35414911, 354424, G03B 1503

Patent

active

050236393

ABSTRACT:
A slave electronic flash unit is removably mounted on a camera having a built-in electronic flash device and generates an auxiliary flash when a part of the flash generated by the built-in electronic flash device is directly detected by a photosensor. A slave electronic flash unit used in combination with a camera of a variable focal length can be flashed only when the camera is set to a telephotography mode in which an exposure is made that would otherwise be under-exposed.

REFERENCES:
patent: 4354141 (1982-10-01), Takematsu

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