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How Electronic Flash Units Work
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accessories adjustments allow angle automatic background batteries bounce bracket bulbs camera capacitor carry cause cells charge circuit close color compartment connection convenient cord correct dark dedicated designed device direct distance easy effect electrical electronic flash equipment expensive exposure f-stop face feet film filter fire flash tube flash unit give Guide head illuminate infrared keep lens lenses less light limitations look manual manufacturers meters models mounted multiple nicads offer operation output pack Photo photographer plug portable posed problem produce range ratio recycle reflective reflector result sensor shadows shooting shutter shutter speed side similar single slave sources speed speedlight stand sure sync cord synchronization technique tion unit's usually wall you're