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How Electronic Flash Units Work
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35mm SLR accessories Amphoto Guide angle auto-thyristor automatic exposure automatic unit automatic-exposure background bare-tube flash beam Bounce flash bracket camera camera-mounted capacitor carbon-zinc charger circuitry close-up color film convenient correct exposure dedicated flash device Edgerton effect elec electrical electronic flash unit equipment f-stop fill light film speed filter fire flash bulbs flash photography flash powder flash tube foreground give guide number hot shoe illuminate Leaf shutters lens lenses light source lighting ratio manual manufacturers meters models mounted multiple flash nicads Nikon F2 Novatron off-camera on-camera flash open-flash button operation output Photo photographer Polaroid portable electronic flash portable flash unit power pack primary batteries rechargeable recycle reflector result ring lights Rollei sensor shadows shooting shutter speed single flash slave cells speedlight units sure sync cord synchro-sun synchronization technique through-the-lens trigger circuit tronic flash unit's Vivitar voltage wide-angle