It's a bird

by Vian Esterhuizen

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Most dSLRS use focal plane shutters with two curtains. The first curtain "opens" the shutter, and the second one "closes" it. The size of the gap between the two shutters determines the shutter speed. The smaller the gap, the faster your shutter speed. When you reach your maximum sync speed (usually around 1/200s, for most cameras), that's the fastest ...

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