Electronic flash photography

Electronic flash photography

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They then multiply the recommended f-stop by the flash-to-subject distance to obtain the flash guide number. The guide number (GN) can be used to calculate quickly the basic exposure at any flash- to-subject distance. f-stop guide number anbsp;...

Title:Electronic flash photography
Author:Ronald G. Carraher, Colleen Chartier
Publisher: - 1980


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