Switch it to manual focus like you said and aim for the right part of the swing motion you're after - give it just a tad longer in the exposure and you'll get some movement in the shot.
Alternatively use a fill-in flash and longer exposure with fixed focus on the eyes. Sync the flash so it fires at the end of the exposure when she's travelling towards you - vice versa if she's moving away.
Experimentation - what it's all about.
Alternatively use a fill-in flash and longer exposure with fixed focus on the eyes. Sync the flash so it fires at the end of the exposure when she's travelling towards you - vice versa if she's moving away.
Experimentation - what it's all about.
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