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Message: <blockquote data-quote="WayneF" data-source="post: 182061" data-attributes="member: 12496">Dropping the ambient exposure back a couple of stops will help, expose more with the flash (more main light instead of fill).  The flash is a speedlignt, faster than the shutter, but sunlight is continuous and will still blur the action.  So reduce the sunlight to reduce the blur.The SB-700 is still a flash, and you have the same focal plane shutter, so it is the same.One exception:  The SB-700 can do Auto FP flash, but the D3100 cannot.   FP mode can use any shutter speed, but otherwise this mode is reduced power, and would need five SB-700 working together to give the same power as one in regular flash mode.</blockquote>